How to passthrough integrated graphics on Intel NUC?

MisterBark · 09-05-2020, 12:55 PM

Hi,
I've been struggling trying to have the HDMI output of my Intel NUC BXNUC10i7FNK i7-10710U display the guest's screen (not talking about xorg, just kernel for now).

System:
Host: Slackware64-current w/ qemu 5.0.0 and virt-manager 1.5.1
Guest: Slackware64-current
Kernel on both: 5.4.58

What I tried so far:

virt-manager PCI passthrough of the adapter ID as shown in lspci: 00:02.0 VGA compatible controller: Intel Corporation Device 9bca (rev 04)
rmmod i915 in host
intel_iommu=on and nomodeset kernel options in host, guest, and both

The further I could go is that the guest turns on the backlight of the monitor at some point in the kernel boot (very close to login prompt). But the screen is still black. Shutting down the guest immediately puts the monitor in blue screen (no signal).
This proves something is working, but there must be a last piece I am missing. What can I try?

jefro · 09-05-2020, 03:33 PM

This is a pretty good info page. https://wiki.archlinux.org/index.php...rough_via_OVMF

My first question might be uefi.

MisterBark · 09-05-2020, 03:43 PM

Quote:

Originally Posted by jefro

This is a pretty good info page. https://wiki.archlinux.org/index.php...rough_via_OVMF

My first question might be uefi.

Thanks for the quick reply.
Hmmm!
My host machine (hardware BIOS) does not have UEFI because I did not want to mess up with Microsoft nonsense on a machine that will only run Linux (and no huge disk).
Is that a mistake? Why would passing the graphic adapter require UEFI?
And are we taking about the real hardware BIOS or the vBIOS only?

MisterBark · 09-07-2020, 08:33 PM

I tried a lot of things these last couple of days so I thought I would update to clarify where I am now.

===== HOST: =====

Blacklisting modules didn't work (probably because the only kernel I have has them as non-modules) so I do rmmod at boot on i915 and all drm*
/proc/cmdline : auto BOOT_IMAGE=Slack-GpuPass ro root=10301 intel_iommu=on nomodeset efifb=off (To enable IOMMU and disable framebuffer)
lshw shows that pci@0000:00:02.0 is using driver=vfio-pci instead of i915 (see below)

lshw:

Code:

nuc.example.org
    description: Computer
    product: NUC10i7FNK (BXNUC10i7FNK)
    vendor: Intel(R) Client Systems
    version: K61156-303
    serial: GEFN017010NV
    width: 64 bits
    capabilities: vsyscall32
    configuration: boot=normal family=FN sku=BXNUC10i7FNK uuid=9B347BB8-16EC-A81A-A5DE-1C697A669474
  *-core
       description: Motherboard
       product: NUC10i7FNB
       vendor: Intel Corporation
       physical id: 0
       version: K61360-303
       serial: GEFN017010NV
       slot: Default string
     *-firmware
          description: BIOS
          vendor: Intel Corp.
          physical id: 0
          version: FNCML357.0038.2020.0131.1422
          date: 01/31/2020
          size: 64KiB
          capacity: 15MiB
          capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int14serial int17printer acpi usb biosbootspecification
     *-memory
          description: System Memory
          physical id: 36
          slot: System board or motherboard
          size: 63GiB
        *-bank:0
             description: SODIMM Synchronous 2667 MHz (0.4 ns)
             product: CT32G4SFD8266.C16FB
             vendor: 859B
             physical id: 0
             serial: E3419994
             slot: SODIMM1
             size: 31GiB
             width: 64 bits
             clock: 2667MHz (0.4ns)
        *-bank:1
             description: SODIMM Synchronous 2667 MHz (0.4 ns)
             product: CT32G4SFD8266.C16FB
             vendor: 859B
             physical id: 1
             serial: E341998F
             slot: SODIMM2
             size: 31GiB
             width: 64 bits
             clock: 2667MHz (0.4ns)
     *-cache:0
          description: L1 cache
          physical id: 42
          slot: L1 Cache
          size: 384KiB
          capacity: 384KiB
          capabilities: synchronous internal write-back unified
     *-cache:1
          description: L2 cache
          physical id: 43
          slot: L2 Cache
          size: 1536KiB
          capacity: 1536KiB
          capabilities: synchronous internal write-back unified
     *-cache:2
          description: L3 cache
          physical id: 44
          slot: L3 Cache
          size: 12MiB
          capacity: 12MiB
          capabilities: synchronous internal write-back unified
     *-cpu
          description: CPU
          product: Intel(R) Core(TM) i7-10710U CPU @ 1.10GHz
          vendor: Intel Corp.
          physical id: 45
          bus info: cpu@0
          version: Intel(R) Core(TM) i7-10710U CPU @ 1.10GHz
          serial: To Be Filled By O.E.M.
          slot: U3E1
          size: 3205MHz
          capacity: 3205MHz
          width: 64 bits
          clock: 100MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d arch_capabilities cpufreq
          configuration: cores=6 enabledcores=6 threads=12
     *-pci
          description: Host bridge
          product: Intel Corporation
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 00
          width: 32 bits
          clock: 33MHz
        *-display
             description: VGA compatible controller
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 04
             width: 64 bits
             clock: 33MHz
             capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
             configuration: driver=vfio-pci latency=0
             resources: irq:153 memory:7d000000-7dffffff memory:80000000-8fffffff ioport:3000(size=64) memory:c0000-dffff
        *-generic:0 UNCLAIMED
             description: System peripheral
             product: Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
             vendor: Intel Corporation
             physical id: 8
             bus info: pci@0000:00:08.0
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm bus_master cap_list
             configuration: latency=0
             resources: iomemory:400-3ff memory:4000120000-4000120fff
        *-generic:1 UNCLAIMED
             description: Signal processing controller
             product: Comet Lake Thermal Subsytem
             vendor: Intel Corporation
             physical id: 12
             bus info: pci@0000:00:12.0
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: latency=0
             resources: iomemory:400-3ff memory:400011f000-400011ffff
        *-usb
             description: USB controller
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 14
             bus info: pci@0000:00:14.0
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi xhci bus_master cap_list
             configuration: driver=xhci_hcd latency=0
             resources: iomemory:400-3ff irq:135 memory:4000100000-400010ffff
        *-memory UNCLAIMED
             description: RAM memory
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 14.2
             bus info: pci@0000:00:14.2
             version: 00
             width: 64 bits
             clock: 33MHz (30.3ns)
             capabilities: pm bus_master cap_list
             configuration: latency=0
             resources: iomemory:400-3ff iomemory:400-3ff memory:4000118000-4000119fff memory:400011e000-400011efff
        *-network:0 DISABLED
             description: Wireless interface
             product: Wireless-AC 9462
             vendor: Intel Corporation
             physical id: 14.3
             bus info: pci@0000:00:14.3
             logical name: wlan0
             version: 00
             serial: 0c:7a:15:6c:47:24
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
             configuration: broadcast=yes driver=iwlwifi driverversion=5.4.58 firmware=50.3e391d3e.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
             resources: iomemory:400-3ff irq:16 memory:4000114000-4000117fff
        *-serial:0
             description: Serial bus controller
             product: Serial IO I2C Host Controller
             vendor: Intel Corporation
             physical id: 15
             bus info: pci@0000:00:15.0
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=intel-lpss latency=0
             resources: iomemory:400-3ff irq:16 memory:400011c000-400011cfff
        *-serial:1
             description: Serial bus controller
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 15.2
             bus info: pci@0000:00:15.2
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=intel-lpss latency=0
             resources: iomemory:400-3ff irq:18 memory:400011d000-400011dfff
        *-communication
             description: Communication controller
             product: Comet Lake Management Engine Interface
             vendor: Intel Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=mei_me latency=0
             resources: iomemory:400-3ff irq:134 memory:400011b000-400011bfff
        *-storage
             description: SATA controller
             product: Comet Lake SATA AHCI Controller
             vendor: Intel Corporation
             physical id: 17
             bus info: pci@0000:00:17.0
             version: 00
             width: 32 bits
             clock: 66MHz
             capabilities: storage msi pm ahci_1.0 bus_master cap_list
             configuration: driver=ahci latency=0
             resources: irq:124 memory:7e220000-7e221fff memory:7e223000-7e2230ff ioport:3090(size=8) ioport:3080(size=4) ioport:3060(size=32) memory:7e222000-7e2227ff
        *-pci:0
             description: PCI bridge
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1d
             bus info: pci@0000:00:1d.0
             version: f0
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:122 memory:7e100000-7e1fffff
           *-storage
                description: Non-Volatile memory controller
                product: E12 NVMe Controller
                vendor: Phison Electronics Corporation
                physical id: 0
                bus info: pci@0000:01:00.0
                version: 01
                width: 64 bits
                clock: 33MHz
                capabilities: storage pciexpress msix msi pm nvm_express bus_master cap_list
                configuration: driver=nvme latency=0
                resources: irq:16 memory:7e100000-7e103fff
        *-pci:1
             description: PCI bridge
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1d.5
             bus info: pci@0000:00:1d.5
             version: f0
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:123 memory:7e000000-7e0fffff
           *-generic
                description: SD Host controller
                product: Genesys Logic, Inc
                vendor: Genesys Logic, Inc
                physical id: 0
                bus info: pci@0000:02:00.0
                version: 00
                width: 32 bits
                clock: 33MHz
                capabilities: pciexpress msi pm bus_master cap_list
                configuration: driver=sdhci-pci latency=0
                resources: irq:151 memory:7e000000-7e000fff
        *-isa
             description: ISA bridge
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 00
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master
             configuration: latency=0
        *-multimedia
             description: Audio device
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=snd_hda_intel latency=32
             resources: iomemory:400-3ff iomemory:400-3ff irq:152 memory:4000110000-4000113fff memory:4000000000-40000fffff
        *-serial:2
             description: SMBus
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1f.4
             bus info: pci@0000:00:1f.4
             version: 00
             width: 64 bits
             clock: 33MHz
             configuration: driver=i801_smbus latency=0
             resources: iomemory:400-3ff irq:16 memory:400011a000-400011a0ff ioport:efa0(size=32)
        *-serial:3 UNCLAIMED
             description: Serial bus controller
             product: Comet Lake SPI (flash) Controller
             vendor: Intel Corporation
             physical id: 1f.5
             bus info: pci@0000:00:1f.5
             version: 00
             width: 32 bits
             clock: 33MHz
             configuration: latency=0
             resources: memory:fe010000-fe010fff
        *-network:1
             description: Ethernet interface
             product: Ethernet Connection (10) I219-V
             vendor: Intel Corporation
             physical id: 1f.6
             bus info: pci@0000:00:1f.6
             logical name: eth0
             version: 00
             serial: 1c:69:7a:66:94:74
             size: 1Gbit/s
             capacity: 1Gbit/s
             width: 32 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
             configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.8.4-NAPI duplex=full firmware=0.6-4 ip=192.168.1.5 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
             resources: irq:136 memory:7e200000-7e21ffff
  *-power UNCLAIMED
       description: To Be Filled By O.E.M.
       product: To Be Filled By O.E.M.
       vendor: To Be Filled By O.E.M.
       physical id: 1
       version: To Be Filled By O.E.M.
       serial: To Be Filled By O.E.M.
       capacity: 32768mWh
  *-network:0
       description: Ethernet interface
       physical id: 2
       logical name: vnet0
       serial: fe:54:00:23:13:1a
       size: 10Mbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full link=yes multicast=yes port=twisted pair speed=10Mbit/s
  *-network:1 DISABLED
       description: Ethernet interface
       physical id: 3
       logical name: virbr0-nic
       serial: 52:54:00:d1:eb:41
       size: 10Mbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full link=no multicast=yes port=twisted pair speed=10Mbit/s

CONTINUING IN NEXT POST BECAUSE OF LENGTH LIMIT OF THE FORUM...

MisterBark · 09-07-2020, 08:34 PM

===== GUEST: =====

lshw shows that the graphic adapter was passed (as pci@0000:00:06.0) and is using i915
As before, the hdmi monitor gets its backlight turned on but black image. When the VM is shut down the hdmi goes into no signal.

lshw:

Code:

main-vm
    description: Computer
    product: Standard PC (i440FX + PIIX, 1996)
    vendor: QEMU
    version: pc-i440fx-5.0
    width: 4294967295 bits
    capabilities: smbios-2.8 dmi-2.8 smp vsyscall32
    configuration: boot=normal uuid=034C0CD8-002E-7647-BD9C-3937921D8854
  *-core
       description: Motherboard
       physical id: 0
     *-firmware
          description: BIOS
          vendor: SeaBIOS
          physical id: 0
          version: rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org
          date: 04/01/2014
          size: 96KiB
     *-cpu:0
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 400
          bus info: cpu@0
          version: pc-i440fx-5.0
          slot: CPU 0
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:1
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 401
          bus info: cpu@1
          version: pc-i440fx-5.0
          slot: CPU 1
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:2
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 402
          bus info: cpu@2
          version: pc-i440fx-5.0
          slot: CPU 2
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:3
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 403
          bus info: cpu@3
          version: pc-i440fx-5.0
          slot: CPU 3
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:4
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 404
          bus info: cpu@4
          version: pc-i440fx-5.0
          slot: CPU 4
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:5
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 405
          bus info: cpu@5
          version: pc-i440fx-5.0
          slot: CPU 5
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:6
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 406
          bus info: cpu@6
          version: pc-i440fx-5.0
          slot: CPU 6
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:7
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 407
          bus info: cpu@7
          version: pc-i440fx-5.0
          slot: CPU 7
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:8
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 408
          bus info: cpu@8
          version: pc-i440fx-5.0
          slot: CPU 8
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:9
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 409
          bus info: cpu@9
          version: pc-i440fx-5.0
          slot: CPU 9
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:10
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 40a
          bus info: cpu@10
          version: pc-i440fx-5.0
          slot: CPU a
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-cpu:11
          description: CPU
          product: Intel Core Processor (Skylake, IBRS)
          vendor: Intel Corp.
          physical id: 40b
          bus info: cpu@11
          version: pc-i440fx-5.0
          slot: CPU b
          size: 2GHz
          capacity: 2GHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 xsaves arat
          configuration: cores=1 enabledcores=1 threads=1
     *-memory
          description: System Memory
          physical id: 1000
          size: 48GiB
          capabilities: ecc
          configuration: errordetection=multi-bit-ecc
        *-bank:0
             description: DIMM RAM
             vendor: QEMU
             physical id: 0
             slot: DIMM 0
             size: 16GiB
        *-bank:1
             description: DIMM RAM
             vendor: QEMU
             physical id: 1
             slot: DIMM 1
             size: 16GiB
        *-bank:2
             description: DIMM RAM
             vendor: QEMU
             physical id: 2
             slot: DIMM 2
             size: 16GiB
     *-pci
          description: Host bridge
          product: 440FX - 82441FX PMC [Natoma]
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 02
          width: 32 bits
          clock: 33MHz
        *-isa
             description: ISA bridge
             product: 82371SB PIIX3 ISA [Natoma/Triton II]
             vendor: Intel Corporation
             physical id: 1
             bus info: pci@0000:00:01.0
             version: 00
             width: 32 bits
             clock: 33MHz
             capabilities: isa
             configuration: latency=0
        *-ide
             description: IDE interface
             product: 82371SB PIIX3 IDE [Natoma/Triton II]
             vendor: Intel Corporation
             physical id: 1.1
             bus info: pci@0000:00:01.1
             version: 00
             width: 32 bits
             clock: 33MHz
             capabilities: ide isa_compatibility_mode-only_controller__supports_bus_mastering bus_master
             configuration: driver=ata_piix latency=0
             resources: irq:0 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:c100(size=16)
        *-bridge
             description: Bridge
             product: 82371AB/EB/MB PIIX4 ACPI
             vendor: Intel Corporation
             physical id: 1.3
             bus info: pci@0000:00:01.3
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: bridge
             configuration: driver=piix4_smbus latency=0
             resources: irq:9
        *-display:0
             description: VGA compatible controller
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 02
             width: 32 bits
             clock: 33MHz
             capabilities: vga_controller rom
             configuration: driver=bochs-drm latency=0
             resources: irq:0 memory:f0000000-f0ffffff memory:fe090000-fe090fff memory:c0000-dffff
        *-network
             description: Ethernet interface
             product: 82540EM Gigabit Ethernet Controller
             vendor: Intel Corporation
             physical id: 3
             bus info: pci@0000:00:03.0
             logical name: eth0
             version: 03
             serial: 52:54:00:23:13:1a
             size: 1Gbit/s
             capacity: 1Gbit/s
             width: 32 bits
             clock: 33MHz
             capabilities: bus_master rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
             configuration: autonegotiation=on broadcast=yes driver=e1000 driverversion=7.3.21-k8-NAPI duplex=full ip=192.168.122.2 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
             resources: irq:11 memory:fe040000-fe05ffff ioport:c000(size=64) memory:fe000000-fe03ffff
        *-usb:0
             description: USB controller
             product: 82801I (ICH9 Family) USB UHCI Controller #1
             vendor: Intel Corporation
             physical id: 4
             bus info: pci@0000:00:04.0
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:11 ioport:c080(size=32)
        *-usb:1
             description: USB controller
             product: 82801I (ICH9 Family) USB UHCI Controller #2
             vendor: Intel Corporation
             physical id: 4.1
             bus info: pci@0000:00:04.1
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:10 ioport:c0a0(size=32)
        *-usb:2
             description: USB controller
             product: 82801I (ICH9 Family) USB UHCI Controller #3
             vendor: Intel Corporation
             physical id: 4.2
             bus info: pci@0000:00:04.2
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:10 ioport:c0c0(size=32)
        *-usb:3
             description: USB controller
             product: 82801I (ICH9 Family) USB2 EHCI Controller #1
             vendor: Intel Corporation
             physical id: 4.7
             bus info: pci@0000:00:04.7
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: ehci bus_master
             configuration: driver=ehci-pci latency=0
             resources: irq:11 memory:fe091000-fe091fff
        *-generic
             description: Unclassified device
             product: Virtio memory balloon
             vendor: Red Hat, Inc.
             physical id: 5
             bus info: pci@0000:00:05.0
             version: 00
             width: 64 bits
             clock: 33MHz
             capabilities: bus_master cap_list
             configuration: driver=virtio-pci latency=0
             resources: irq:10 ioport:c0e0(size=32) memory:f1000000-f1003fff
           *-virtio0 UNCLAIMED
                description: Virtual I/O device
                physical id: 0
                bus info: virtio@0
                configuration: driver=virtio_balloon
        *-display:1
             description: VGA compatible controller
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 6
             bus info: pci@0000:00:06.0
             version: 04
             width: 64 bits
             clock: 33MHz
             capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:24 memory:fd000000-fdffffff memory:e0000000-efffffff ioport:c040(size=64) memory:fe060000-fe07ffff

At this point I suspect 2 possibilities:

1. The VGA adapter created by virt-manager (as pci@0000:00:02.0 in the VM) confuses the kernel so that the passed-through adapter (pci@0000:00:06.0) is completely disregarded by the terminal (and X because I didn't configure that specifically in xorg.conf)
If so, how can I remove the video device in virt-manager? When I try it puts the default Cirrus.
Would that be the -nographic option in qemu? I don't know where to set that in virt-manager and if I try to replicate the way it calls qemu-kvm I have to deal with password files and I'm not too sure how the GUI creates them.

2. My frame buffer kernel parameter efifb=off on the host isn't enough, and something messes up the firmware of the graphic adapter before the VM gets a chance to use it. Is there a difference between successfully blacklisting the modules and unloading them w/ rmmod right after boot?

To test assumption 1, is there anything I can call on pci@0000:00:06.0 just to see if anything shows on the screen? Like a quick hello world test that would use the device directly?

dc.901 · 09-08-2020, 07:21 AM

Quote:

Originally Posted by MisterBark

Intel NUC BXNUC10i7FNK i7-10710U

Recently acquired this exact same model; and realized that few Linux distributions I tried, did not have proper drivers for display. Ones I tried were Fedora 32 / openSuse 15.2 / Ubuntu 20

I do not know if that may be the issue here?

Take a look at "lspci -v" output.

MisterBark · 09-08-2020, 10:24 AM

I don't think that's an issue because it's fine outside of the VM, and both systems VM and host are identical (Slackware64 current).

lspci -v on HOST:

Code:

00:00.0 Host bridge: Intel Corporation Device 9b51
	DeviceName:  Intel Dual Band
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IOMMU group 0
	Capabilities: [e0] Vendor Specific Information: Len=10 <?>

00:02.0 VGA compatible controller: Intel Corporation Device 9bca (rev 04) (prog-if 00 [VGA controller])
	DeviceName:  GPU
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IRQ 153, IOMMU group 1
	Memory at 7d000000 (64-bit, non-prefetchable) [size=16M]
	Memory at 80000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 3000 [size=64]
	Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
	Capabilities: [40] Vendor Specific Information: Len=0c <?>
	Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
	Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [d0] Power Management version 2
	Capabilities: [100] Process Address Space ID (PASID)
	Capabilities: [200] Address Translation Service (ATS)
	Capabilities: [300] Page Request Interface (PRI)
	Kernel driver in use: vfio-pci
	Kernel modules: i915

00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
	Subsystem: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model
	Flags: bus master, fast devsel, latency 0, IRQ 11, IOMMU group 2
	Memory at 4000120000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
	Capabilities: [dc] Power Management version 2
	Capabilities: [f0] PCI Advanced Features

00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IRQ 11, IOMMU group 3
	Memory at 400011f000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: [50] Power Management version 3
	Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-

00:14.0 USB controller: Intel Corporation Device 02ed (prog-if 30 [XHCI])
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, medium devsel, latency 0, IRQ 135, IOMMU group 4
	Memory at 4000100000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: [70] Power Management version 2
	Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+
	Capabilities: [90] Vendor Specific Information: Len=14 <?>
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci

00:14.2 RAM memory: Intel Corporation Device 02ef
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IOMMU group 4
	Memory at 4000118000 (64-bit, non-prefetchable) [size=8K]
	Memory at 400011e000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: [80] Power Management version 3

00:14.3 Network controller: Intel Corporation Wireless-AC 9462
	Subsystem: Intel Corporation Device 0074
	Flags: bus master, fast devsel, latency 0, IRQ 16, IOMMU group 5
	Memory at 4000114000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [40] Express Root Complex Integrated Endpoint, MSI 00
	Capabilities: [80] MSI-X: Enable+ Count=16 Masked-
	Capabilities: [100] Latency Tolerance Reporting
	Capabilities: [164] Vendor Specific Information: ID=0010 Rev=0 Len=014 <?>
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

00:15.0 Serial bus controller [0c80]: Intel Corporation Serial IO I2C Host Controller
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IRQ 16, IOMMU group 6
	Memory at 400011c000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: [80] Power Management version 3
	Capabilities: [90] Vendor Specific Information: Len=14 <?>
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci

00:15.2 Serial bus controller [0c80]: Intel Corporation Device 02ea
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IRQ 18, IOMMU group 6
	Memory at 400011d000 (64-bit, non-prefetchable) [virtual] [size=4K]
	Capabilities: [80] Power Management version 3
	Capabilities: [90] Vendor Specific Information: Len=14 <?>
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci

00:16.0 Communication controller: Intel Corporation Comet Lake Management Engine Interface
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IRQ 134, IOMMU group 7
	Memory at 400011b000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: [50] Power Management version 3
	Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [a4] Vendor Specific Information: Len=14 <?>
	Kernel driver in use: mei_me
	Kernel modules: mei_me

00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller (prog-if 01 [AHCI 1.0])
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 124, IOMMU group 8
	Memory at 7e220000 (32-bit, non-prefetchable) [size=8K]
	Memory at 7e223000 (32-bit, non-prefetchable) [size=256]
	I/O ports at 3090 [size=8]
	I/O ports at 3080 [size=4]
	I/O ports at 3060 [size=32]
	Memory at 7e222000 (32-bit, non-prefetchable) [size=2K]
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [70] Power Management version 3
	Capabilities: [a8] SATA HBA v1.0
	Kernel driver in use: ahci

00:1d.0 PCI bridge: Intel Corporation Device 02b0 (rev f0) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 122, IOMMU group 9
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
	I/O behind bridge: [disabled]
	Memory behind bridge: 7e100000-7e1fffff [size=1M]
	Prefetchable memory behind bridge: [disabled]
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Intel Corporation Device 2081
	Capabilities: [a0] Power Management version 3
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Access Control Services
	Capabilities: [150] Precision Time Measurement
	Capabilities: [200] L1 PM Substates
	Capabilities: [220] Secondary PCI Express
	Capabilities: [250] Downstream Port Containment
	Kernel driver in use: pcieport

00:1d.5 PCI bridge: Intel Corporation Device 02b5 (rev f0) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 123, IOMMU group 10
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
	I/O behind bridge: [disabled]
	Memory behind bridge: 7e000000-7e0fffff [size=1M]
	Prefetchable memory behind bridge: [disabled]
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Intel Corporation Device 2081
	Capabilities: [a0] Power Management version 3
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Access Control Services
	Capabilities: [150] Precision Time Measurement
	Capabilities: [200] L1 PM Substates
	Capabilities: [220] Secondary PCI Express
	Capabilities: [250] Downstream Port Containment
	Kernel driver in use: pcieport

00:1f.0 ISA bridge: Intel Corporation Device 0284
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IOMMU group 11

00:1f.3 Audio device: Intel Corporation Device 02c8 (prog-if 80)
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 32, IRQ 152, IOMMU group 11
	Memory at 4000110000 (64-bit, non-prefetchable) [size=16K]
	Memory at 4000000000 (64-bit, non-prefetchable) [size=1M]
	Capabilities: [50] Power Management version 3
	Capabilities: [80] Vendor Specific Information: Len=14 <?>
	Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel, snd_soc_skl, snd_sof_pci

00:1f.4 SMBus: Intel Corporation Device 02a3
	Subsystem: Intel Corporation Device 2081
	Flags: medium devsel, IRQ 16, IOMMU group 11
	Memory at 400011a000 (64-bit, non-prefetchable) [size=256]
	I/O ports at efa0 [size=32]
	Kernel driver in use: i801_smbus
	Kernel modules: i2c_i801

00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake SPI (flash) Controller
	Subsystem: Intel Corporation Device 2081
	Flags: fast devsel, IOMMU group 11
	Memory at fe010000 (32-bit, non-prefetchable) [size=4K]

00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (10) I219-V
	DeviceName:  LAN
	Subsystem: Intel Corporation Ethernet Connection (10) I219-V
	Flags: bus master, fast devsel, latency 0, IRQ 136, IOMMU group 11
	Memory at 7e200000 (32-bit, non-prefetchable) [size=128K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Kernel driver in use: e1000e
	Kernel modules: e1000e

01:00.0 Non-Volatile memory controller: Phison Electronics Corporation E12 NVMe Controller (rev 01) (prog-if 02 [NVM Express])
	Subsystem: Phison Electronics Corporation E12 NVMe Controller
	Flags: bus master, fast devsel, latency 0, IRQ 16, NUMA node 0, IOMMU group 12
	Memory at 7e100000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [80] Express Endpoint, MSI 00
	Capabilities: [d0] MSI-X: Enable+ Count=9 Masked-
	Capabilities: [e0] MSI: Enable- Count=1/8 Maskable- 64bit+
	Capabilities: [f8] Power Management version 3
	Capabilities: [100] Latency Tolerance Reporting
	Capabilities: [110] L1 PM Substates
	Capabilities: [128] Alternative Routing-ID Interpretation (ARI)
	Capabilities: [200] Advanced Error Reporting
	Capabilities: [300] Secondary PCI Express
	Kernel driver in use: nvme

02:00.0 SD Host controller: Genesys Logic, Inc Device 9755 (prog-if 01)
	Subsystem: Intel Corporation Device 2081
	Flags: bus master, fast devsel, latency 0, IRQ 151, IOMMU group 13
	Memory at 7e000000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [80] Express Endpoint, MSI 00
	Capabilities: [e0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [f8] Power Management version 3
	Capabilities: [100] Vendor Specific Information: ID=17a0 Rev=1 Len=008 <?>
	Capabilities: [108] Latency Tolerance Reporting
	Capabilities: [110] L1 PM Substates
	Capabilities: [200] Advanced Error Reporting
	Kernel driver in use: sdhci-pci
	Kernel modules: sdhci_pci

lspci -v on VM:

Code:

00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
	Subsystem: Red Hat, Inc. Qemu virtual machine
	Flags: fast devsel
	Kernel modules: intel_agp

00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
	Subsystem: Red Hat, Inc. Qemu virtual machine
	Flags: medium devsel

00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] (prog-if 80 [ISA Compatibility mode-only controller, supports bus mastering])
	Subsystem: Red Hat, Inc. Qemu virtual machine
	Flags: bus master, medium devsel, latency 0
	Memory at 000001f0 (32-bit, non-prefetchable) [virtual] [size=8]
	Memory at 000003f0 (type 3, non-prefetchable) [virtual]
	Memory at 00000170 (32-bit, non-prefetchable) [virtual] [size=8]
	Memory at 00000370 (type 3, non-prefetchable) [virtual]
	I/O ports at c100 [virtual] [size=16]
	Kernel driver in use: ata_piix

00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
	Subsystem: Red Hat, Inc. Qemu virtual machine
	Flags: medium devsel, IRQ 9
	Kernel driver in use: piix4_smbus
	Kernel modules: i2c_piix4

00:02.0 VGA compatible controller: Device 1234:1111 (rev 02) (prog-if 00 [VGA controller])
	Subsystem: Red Hat, Inc. Device 1100
	Flags: fast devsel
	Memory at f0000000 (32-bit, prefetchable) [size=16M]
	Memory at fe090000 (32-bit, non-prefetchable) [size=4K]
	Expansion ROM at 000c0000 [disabled] [size=128K]
	Kernel driver in use: bochs-drm
	Kernel modules: bochs_drm

00:03.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 03)
	Subsystem: Red Hat, Inc. QEMU Virtual Machine
	Physical Slot: 3
	Flags: bus master, fast devsel, latency 0, IRQ 11
	Memory at fe040000 (32-bit, non-prefetchable) [size=128K]
	I/O ports at c000 [size=64]
	Expansion ROM at fe000000 [disabled] [size=256K]
	Kernel driver in use: e1000
	Kernel modules: e1000

00:04.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03) (prog-if 00 [UHCI])
	Subsystem: Red Hat, Inc. QEMU Virtual Machine
	Flags: bus master, fast devsel, latency 0, IRQ 11
	I/O ports at c080 [size=32]
	Kernel driver in use: uhci_hcd
	Kernel modules: uhci_hcd

00:04.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03) (prog-if 00 [UHCI])
	Subsystem: Red Hat, Inc. QEMU Virtual Machine
	Flags: bus master, fast devsel, latency 0, IRQ 10
	I/O ports at c0a0 [size=32]
	Kernel driver in use: uhci_hcd
	Kernel modules: uhci_hcd

00:04.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03) (prog-if 00 [UHCI])
	Subsystem: Red Hat, Inc. QEMU Virtual Machine
	Flags: bus master, fast devsel, latency 0, IRQ 10
	I/O ports at c0c0 [size=32]
	Kernel driver in use: uhci_hcd
	Kernel modules: uhci_hcd

00:04.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) (prog-if 20 [EHCI])
	Subsystem: Red Hat, Inc. QEMU Virtual Machine
	Flags: bus master, fast devsel, latency 0, IRQ 11
	Memory at fe091000 (32-bit, non-prefetchable) [size=4K]
	Kernel driver in use: ehci-pci
	Kernel modules: ehci_pci

00:05.0 Unclassified device [00ff]: Red Hat, Inc. Virtio memory balloon
	Subsystem: Red Hat, Inc. Virtio memory balloon
	Physical Slot: 5
	Flags: bus master, fast devsel, latency 0, IRQ 10
	I/O ports at c0e0 [size=32]
	Memory at f1000000 (64-bit, prefetchable) [size=16K]
	Capabilities: [84] Vendor Specific Information: VirtIO: <unknown>
	Capabilities: [70] Vendor Specific Information: VirtIO: Notify
	Capabilities: [60] Vendor Specific Information: VirtIO: DeviceCfg
	Capabilities: [50] Vendor Specific Information: VirtIO: ISR
	Capabilities: [40] Vendor Specific Information: VirtIO: CommonCfg
	Kernel driver in use: virtio-pci
	Kernel modules: virtio_pci

00:06.0 VGA compatible controller: Intel Corporation Device 9bca (rev 04) (prog-if 00 [VGA controller])
	Subsystem: Intel Corporation Device 2081
	Physical Slot: 6
	Flags: bus master, fast devsel, latency 0, IRQ 24
	Memory at fd000000 (64-bit, non-prefetchable) [size=16M]
	Memory at e0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at c040 [size=64]
	Expansion ROM at fe060000 [disabled] [size=128K]
	Capabilities: [40] Vendor Specific Information: Len=0c <?>
	Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
	Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [d0] Power Management version 2
	Kernel driver in use: i915
	Kernel modules: i915

MisterBark · 04-05-2021, 05:52 PM

Hi!
Sorry to bump this back up but I tried to work on this again but unsuccessfully... Would anyone have any new suggestions of what I should try?
Thanks!

Emerson · 04-05-2021, 06:57 PM

I'm trying to understand your setup. You have Slackware host running headless, no video output of any kind? And then you have guest which is supposed to have full control over graphics hardware, correct? How do you know your hardware supports primary graphics handover to the guest? It is rather unusual ... never heard it done ...

MisterBark · 04-05-2021, 07:41 PM

Quote:

Originally Posted by Emerson

I'm trying to understand your setup. You have Slackware host running headless, no video output of any kind? And then you have guest which is supposed to have full control over graphics hardware, correct?

That's right. I control the host remotely, either via VNC or SSH.

Quote:

Originally Posted by Emerson

How do you know your hardware supports primary graphics handover to the guest? It is rather unusual ... never heard it done ...

Hmmm, really?
Let me make sure I understand what you are saying here... Are you saying that GPU passthrough is pretty much never done on the main GPU of a machine, that everyone keeps that for the host and passes secondary GPUs to the guest? And that it's usually not only not done but not even supported?

dc.901 · 04-05-2021, 07:54 PM

To me this was a drivers issue; for example, see the device (from your lspci -v output)

Code:

00:02.0 VGA compatible controller: Intel Corporation Device 9bca (rev 04) (prog-if 00 [VGA controller])

With proper drivers, it should show something similar to:

Code:

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 530 (rev 06) (prog-if 00 [VGA controller])

Granted above is not from my Nuc, which is unused at the moment until I have time to fool with drivers on it.

Emerson · 04-05-2021, 08:43 PM

MisterBark,

while in theory once passthru support is enabled in firmware it could be possible for all PCI devices, I see no apparent reason why not. I know near to nothing about practical side, so I better shut up. However, if you continue having issues this is something I'd read up on. Hardware manufacturer may have their own ideas how this box can be used.

Edit: there is a bunch IOMMU related options in kernel, you sure your host kernel is not missing anything?

MisterBark · 04-05-2021, 10:04 PM

Thanks both of you.
Ok I will check these closer, thanks!