I am having a problem with the external display (connected via HDMI) to my laptop. It works properly on other operating systems but not with the Ubuntu 22.04. Dell 27" 25XCMS2. I get either a white screen or 1/4 of the top is a bar which has the image in it and the rest of the screen is white. (see attached)

I've changed the resolution to no avail.
Driver appears to be X.Org.X server -nouveau display driver from xserver-xorg-video-nouveau (open source) if that is any consequence. I do not know how to change drivers if that is necessay.


My laptop system info is:
Model HP Pavilion Gaming Laptop 15-ec0xxx

Memory Size 16384 MB RAM
BIOS Date 07/09/2020
BIOS Revision F.08
Installed OS version 2004 (10.0.19041)
Processor Type AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx
Current Processor Speed 2100 MHz

Attached Thumbnails

   

Doing a search shows issues with Wayland and second monitors. I think Wayland is the default for Ubuntu, so try changing the session to use X.org.

Sorry, what is Wayland and how do I change the session to use X.org (which I think I am currently using).

Wayland is/will be a display manager like X11...it's not as mature right now, and has issues.
https://linuxconfig.org/how-to-enabl...-22-04-desktop

I followed the directions in the link you provided and used nano to edit the custom.conf file to both include and exclude Wayland.
Results were:

1. waylandenable=false - the secondary display works and displays all data except the computer now becomes VERY slow. A few seconds (5-30) wait is required for anything to happen after clicking an icon, an executable, or any link.

2. waylandenable=true - secondary display does not work (per the image attached to the original post) but the speed (from the laptop) is ok.

So, the bottom line is that with waylandenable=false, the display now works but there is a significant speed problem. In order to use Ubuntu on the laptop, I need to exclude the remote monitor and only use the laptop screen.

Ok, I noticed something...you're using the Nouveau driver. Have you tried loading the Radeon driver?
https://www.amd.com/en/support/previ.../radeon-rx-550

You may be on to something here. I just noticed a bunch of error lines flash on the screen as it boots up (too fast to read - other than the word "Nouveau").
I tried installing the Radeon driver but no change. However, I may not have installed the Radeon driver properly as the Nouveau error continues to flash at boot. Any suggestions on how to insure the Radeon driver is installed and not the Nouveau?

It appears that I have two drivers installed.

*-display
description: VGA compatible controller
product: GP107M [GeForce GTX 1050 3 GB Max-Q]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
logical name: /dev/fb0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom fb
configuration: depth=32 driver=nouveau latency=0 resolution=2560,1440
resources: irq:80 memory:f6000000-f6ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:f000(size=128) memory:f7000000-f707ffff
*-display
description: VGA compatible controller
product: Picasso/Raven 2 [Radeon Vega Series / Radeon Vega Mobile Series]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:05:00.0
logical name: /dev/fb1
version: c2
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix vga_controller bus_master cap_list fb
configuration: depth=32 driver=amdgpu latency=0 resolution=1920,1080
resources: irq:24 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:c000(size=256) memory:f7500000-f757ffff

Wow...never seen nVidia and Radeon together. You should (??) be able to load the Radeon drivers as well as the nVidia drivers.
https://linuxconfig.org/how-to-insta...n-ubuntu-22-04

That would get rid of the Nouveau driver, and may make things work better. Unsure, though..uncharted territory for me.

Got it to only read the Radeon driver (I think - see log) but the extremely slow response still persists.

LOG:
12:21:03 kernel: [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to grab modeset ownership
11:20:23 kernel: audit: type=1326 audit(1659637223.300:76): auid=1000 uid=1000 gid=1000 ses=2 subj=? pid=3532 comm="GLXVsyncThread" exe="/snap/firefox/1232/usr/lib/firefox/firefox" sig=0 arch=c000003e syscall=312 compat=0 ip=0x7f144483b73d code=0x50000
11:20:22 kernel: kauditd_printk_skb: 3 callbacks suppressed
11:18:02 kernel: audit: type=1107 audit(1659637082.749:63): pid=735 uid=102 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/PolicyKit1/Authority" interface="org.freedesktop.PolicyKit1.Authority" member="CheckAuthorization" mask="send" name=":1.7" pid=1805 label="snap.snap-store.ubuntu-software" peer_pid=749 peer_label="unconfined"
exe="/usr/bin/dbus-daemon" sauid=102 hostname=? addr=? terminal=?'
11:17:57 kernel: Bluetooth: hci1: setting interface failed (110)
11:17:56 kernel: audit: type=1400 audit(1659637076.741:53): apparmor="DENIED" operation="capable" profile="/snap/snapd/16292/usr/lib/snapd/snap-confine" pid=1805 comm="snap-confine" capability=4 capname="fsetid"
11:17:56 kernel: rfkill: input handler disabled
11:17:56 kernel: audit: type=1400 audit(1659637076.501:49): apparmor="DENIED" operation="capable" profile="/snap/snapd/16292/usr/lib/snapd/snap-confine" pid=1037 comm="snap-confine" capability=38 capname="perfmon"
11:17:54 kernel: kauditd_printk_skb: 35 callbacks suppressed
11:17:54 kernel: IPv6: ADDRCONF(NETDEV_CHANGE): wlo1: link becomes ready
11:17:54 kernel: wlo1: associated
11:17:54 kernel: rtw_8822ce 0000:03:00.0: sta 82:2a:a8:db:0e:3d joined with macid 0
11:17:54 kernel: wlo1: RX AssocResp from 82:2a:a8:db:0e:3d (capab=0x11 status=0 aid=4)
11:17:52 kernel: Bluetooth: hci1: CSR: Failed to suspend the device for our Barrot 8041a02 receive-issue workaround
11:17:49 kernel: nvidia-uvm: Loaded the UVM driver, major device number 504.
11:17:49 kernel: nvidia_uvm: module uses symbols from proprietary module nvidia, inheriting taint.
11:17:49 kernel: loop17: detected capacity change from 0 to 8
11:17:49 kernel: rtw_8822ce 0000:03:00.0: start vif c0:e4:34:0b:5f:a9 on port 0
11:17:48 kernel: [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 1
11:17:48 kernel: r8169 0000:04:00.0 eno1: Link is Down
11:17:47 kernel: Generic FE-GE Realtek PHY r8169-0-400:00: attached PHY driver (mii_bushy_addr=r8169-0-400:00, irq=MAC)
11:17:47 kernel: NET: Registered PF_ALG protocol family
11:17:47 kernel: Bluetooth: BNEP socket layer initialized
11:17:47 kernel: input: HD-Audio Generic Headphone as /devices/pci0000:00/0000:00:08.1/0000:05:00.6/sound/card1/input41
11:17:47 kernel: ACPI Warning: \_SB.PCI0.GPP0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20210730/nsarguments-61)
11:17:47 kernel: [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
11:17:47 kernel: intel_rapl_common: Found RAPL domain core
11:17:47 kernel: nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 515.65.01 Wed Jul 20 13:43:59 UTC 2022
11:17:47 kernel: [drm] Initialized amdgpu 3.42.0 20150101 for 0000:05:00.0 on minor 0
11:17:47 kernel: amdgpu 0000:05:00.0: amdgpu: ring jpeg_dec uses VM inv eng 6 on hub 1
11:17:47 kernel: Console: switching to colour frame buffer device 240x67
11:17:47 kernel: fbcon: amdgpudrmfb (fb0) is primary device
11:17:47 kernel: [drm] pitch is 7680
11:17:47 kernel: amdgpu 0000:05:00.0: amdgpu: SE 1, SH per SE 1, CU per SH 11, active_cu_number 8
11:17:47 kernel: kfd kfd: amdgpu: added device 1002:15d8
11:17:47 kernel: amdgpu: Topology: Add APU node [0x15d8:0x1002]
11:17:47 kernel: memmap_init_zone_device initialised 524288 pages in 4ms
11:17:47 kernel: NVRM: loading NVIDIA UNIX x86_64 Kernel Module 515.65.01 Wed Jul 20 14:00:58 UTC 2022
11:17:47 kernel: Bluetooth: hci0: RTL: fw version 0x19b76d7d
11:17:47 kernel: kfd kfd: amdgpu: Allocated 3969056 bytes on gart
11:17:47 kernel: [drm] VCN decode and encode initialized successfully(under SPG Mode).
11:17:47 kernel: nvidia 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=nonewns=none
11:17:47 kernel:
11:17:47 kernel: nvidia-nvlink: Nvlink Core is being initialized, major device number 506
11:17:47 kernel: mtd device must be supplied (device name is empty)
11:17:47 kernel: MCE: In-kernel MCE decoding enabled.
11:17:47 kernel: [drm] Display Core initialized with v3.2.149!
11:17:47 kernel: amdgpu 0000:05:00.0: amdgpu: RAP: optional rap ta ucode is not available
11:17:47 kernel: Disabling lock debugging due to kernel taint
11:17:47 kernel: nvidia: module license 'NVIDIA' taints kernel.
11:17:47 kernel: SVM: Virtual GIF supported

Looks like the nVidia driver is loaded, but if the HDMI port is using Radeon, that may be it. Have you loaded the Radeon drivers?

I thought I did. I'll go check out if and how.

I thought I did. I'll go check out if and how. Radeon makes it impossible to understand how to install this.

I think the newest AMD driver for Linux is named amdgpu, the radeon driver is for older graphics cards.
Looks like it does have both AMD and Nvidia gpus; https://linux-hardware.org/?probe=29f2cd44d5

Here is the output of the link you sent. Not sure what it means.

Attached Files

driver-test.pdf (109.2 KB, 8 views)