Hello
Is there any way to disable VGA output port in linux. I mean when I plug monitor to VGA port nothing displayed exactly like those times that the system is turned off (disabling all output signal to vga port)?

Thanks a lot.

Yes, there is.

0 members found this post helpful.

thank you very much because of your "yes there is" but would you please tell me how and what should I do? where should I start? or would you please give an example? or any thing more than "YES THERE IS".

If the VGA hardware is onboard (on the motherboard) you may be able to disable it in the BIOS.

my vga hardware is onboard but has nothing in bios configuration related to it.
and I want some configuration in linux OS not bios.

I was being semi-facetious in my reply, but also trying to illustrate how frustrating a lack of information can be.
Can you provide some more details about the system... hardware used... distribution and so on.

this is a mini pc with 1.6 intel atom cpu and all the things on it are on board and my graphic out put is not vga it is DVI .

just don't plug anything into it, it should automatically detect which plug your monitor is attached to and disable the rest automatically, at least mine does

We need more than that to help you. Brand? Model? Version of Linux?

uname -a
Linux solmate2 2.6.32-21-generic #32-Ubuntu SMP Fri Apr 16 08:10:02 UTC 2010 i686 GNU/Linux


cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz
stepping : 2
cpu MHz : 1600.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm
bogomips : 3200.29
clflush size : 64
cache_alignment : 64
address sizes : 32 bits physical, 32 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz
stepping : 2
cpu MHz : 1600.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm
bogomips : 3200.29
clflush size : 64
cache_alignment : 64
address sizes : 32 bits physical, 32 bits virtual
power management:

root@solmate2:~# cat /proc/meminfo
MemTotal: 1018120 kB
MemFree: 577020 kB
Buffers: 26248 kB
Cached: 79812 kB
SwapCached: 0 kB
Active: 74364 kB
Inactive: 72840 kB
Active(anon): 44744 kB
Inactive(anon): 0 kB
Active(file): 29620 kB
Inactive(file): 72840 kB
Unevictable: 0 kB
Mlocked: 0 kB
HighTotal: 130824 kB
HighFree: 2800 kB
LowTotal: 887296 kB
LowFree: 574220 kB
SwapTotal: 2980856 kB
SwapFree: 2980856 kB
Dirty: 92 kB
Writeback: 0 kB
AnonPages: 41148 kB
Mapped: 19580 kB
Shmem: 3596 kB
Slab: 14228 kB
SReclaimable: 4540 kB
SUnreclaim: 9688 kB
KernelStack: 1600 kB
PageTables: 1604 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 3489916 kB
Committed_AS: 333480 kB
VmallocTotal: 122880 kB
VmallocUsed: 22368 kB
VmallocChunk: 95004 kB
HardwareCorrupted: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 4096 kB
DirectMap4k: 20472 kB
DirectMap4M: 888832 kB


lshw
PCI (sysfs)


local
description: Desktop Computer
product: To Be Filled By O.E.M.
vendor: Quanmax Inc.
version: B1
serial: To Be Filled By O.E.M.
width: 32 bits
capabilities: smbios-2.4 dmi-2.4 smp-1.4 smp
configuration: boot=normal chassis=desktop cpus=1 uuid=00020003-0004-0005-0006-000700080009
*-core
description: Motherboard
product: To be filled by O.E.M.
vendor: Quanmax Inc.
physical id: 0
version: B1
serial: To be filled by O.E.M.
slot: To Be Filled By O.E.M.
*-firmware
description: BIOS
vendor: American Megatrends Inc.
physical id: 0
version: 1.12 (07/09/2010)
size: 64KiB
capacity: 960KiB
capabilities: isa pci pnp apm upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int14serial int17printer int10video acpi usb ls120boot zipboot biosbootspecification
*-cpu
description: CPU
product: Intel(R) Atom(TM) CPU N270 @ 1.60GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: 6.12.2
serial: 0001-06C2-0000-0000-0000-0000
slot: CPU 1
size: 1600MHz
capacity: 1600MHz
width: 32 bits
clock: 133MHz
capabilities: boot fpu fpu_exception wp vme de tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm pse cpufreq
configuration: id=0
*-cache:0
description: L1 cache
physical id: 5
slot: L1-Cache
size: 24KiB
capacity: 24KiB
capabilities: internal write-back data
*-cache:1
description: L2 cache
physical id: 6
slot: L2-Cache
size: 512KiB
capacity: 512KiB
capabilities: internal write-back unified
*-logicalcpu:0
description: Logical CPU
physical id: 0.1
width: 32 bits
capabilities: logical
*-logicalcpu:1
description: Logical CPU
physical id: 0.2
width: 32 bits
capabilities: logical
*-memory
description: System Memory
physical id: c
slot: System board or motherboard
size: 1GiB
*-bank
description: DIMM SDRAM Synchronous
product: PartNum0
vendor: Manufacturer0
physical id: 0
serial: SerNum0
slot: DIMM0
size: 1GiB
width: 64 bits
*-pci
description: Host bridge
product: Mobile 945GME Express Memory Controller Hub
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 03
width: 32 bits
clock: 33MHz
configuration: driver=agpgart-intel
resources: irq:0
*-display:0
description: VGA compatible controller
product: Mobile 945GME Express Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: msi pm bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:16 memory:fea80000-feafffff ioport:dc80(size=8) memory:d0000000-dfffffff(prefetchable) memory:fea40000-fea7ffff
*-display:1 UNCLAIMED
description: Display controller
product: Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2.1
bus info: pci@0000:00:02.1
version: 03
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: latency=0
resources: memory:fe980000-fe9fffff
*-multimedia
description: Audio device
product: N10/ICH 7 Family High Definition Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=HDA Intel latency=0
resources: irq:16 memory:fea38000-fea3bfff
*-pci:0
description: PCI bridge
product: N10/ICH 7 Family PCI Express Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm bus_master cap_list
configuration: driver=pcieport
resources: irq:24 ioport:e000(size=4096) memory:feb00000-febfffff ioport:fdf00000(size=1048576)
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: eth0
version: 02
serial: 00:50:08:03:9c:c2
size: 100MB/s
capacity: 1GB/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=192.168.8.132 latency=0 link=yes multicast=yes port=MII speed=100MB/s
resources: irq:25 ioport:ec00(size=256) memory:febff000-febfffff memory:fdff0000-fdffffff(prefetchable) memory:febc0000-febdffff(prefetchable)
*-usb:0
description: USB Controller
product: N10/ICH7 Family USB UHCI Controller #1
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:23 ioport:dc00(size=32)
*-usb:1
description: USB Controller
product: N10/ICH 7 Family USB UHCI Controller #2
vendor: Intel Corporation
physical id: 1d.1
bus info: pci@0000:00:1d.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:19 ioport:d880(size=32)
*-usb:2
description: USB Controller
product: N10/ICH 7 Family USB UHCI Controller #3
vendor: Intel Corporation
physical id: 1d.2
bus info: pci@0000:00:1d.2
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:18 ioport:d800(size=32)
*-usb:3
description: USB Controller
product: N10/ICH 7 Family USB UHCI Controller #4
vendor: Intel Corporation
physical id: 1d.3
bus info: pci@0000:00:1d.3
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:16 ioport:d480(size=32)
*-usb:4
description: USB Controller
product: N10/ICH 7 Family USB2 EHCI Controller
vendor: Intel Corporation
physical id: 1d.7
bus info: pci@0000:00:1d.7
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm debug bus_master cap_list
configuration: driver=ehci_hcd latency=0
resources: irq:23 memory:fea37c00-fea37fff
*-pci:1
description: PCI bridge
product: 82801 Mobile PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: e2
width: 32 bits
clock: 33MHz
capabilities: pci bus_master cap_list
*-isa
description: ISA bridge
product: 82801GBM (ICH7-M) LPC Interface Bridge
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: latency=0
*-ide
description: IDE interface
product: 82801GBM/GHM (ICH7 Family) SATA IDE Controller
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
logical name: scsi0
version: 02
width: 32 bits
clock: 66MHz
capabilities: ide pm bus_master cap_list emulated
configuration: driver=ata_piix latency=0
resources: irq:19 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:ffa0(size=16)
*-disk
description: ATA Disk
product: WDC WD1600BEVT-2
vendor: Western Digital
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 11.0
serial: WD-WXF0EA9TP192
size: 149GiB (160GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=0004cd6a
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /
version: 1.0
serial: 2d4637c3-b7ec-4373-b07a-b2247fe4e786
size: 146GiB
capacity: 146GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2002-01-05 05:14:53 filesystem=ext4 lastmountpoint=/�ꥅ�H�����A�����u^ �U/����~!��������������a modified=2010-12-22 10:16:39 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,barrier=1,data=ordered mounted=2010-12-25 16:35:18 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
size: 2911MiB
capacity: 2911MiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume
description: Linux swap / Solaris partition
physical id: 5
logical name: /dev/sda5
capacity: 2911MiB
capabilities: nofs
*-serial UNCLAIMED
description: SMBus
product: N10/ICH 7 Family SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 02
width: 32 bits
clock: 33MHz
configuration: latency=0
resources: ioport:400(size=32)


I think it would be complete information of my system.

That is very complete information but the brand and model would be more useful in the first instance.

it is a mini fanless pc from Quanmax Company model:QBOX-1010

Thanks for the information. It is a neat looking device

Now that I know it is not a portable computer with a built-in screen ...

The only way I can think of (there may be other ways) is to ensure the kernel uses a loadable module for the Mobile 945GME Express Integrated Graphics Controller hardware and then blacklist it. It looks as if the driver is i915 but there may be an Intel-supplied module too (according to my understanding of these netsearch results).

The lsmod command lists the loaded modules.

On of the /var/log/* files -- probably /var/log/messages, depending on which distro you are running -- should have messages from the booting kernel as it probes the hardware and should list the 945G and the driver/module used for it, regardless of whether the module is built-in or loadable.