disabling all video

disabling all video

[Davy Durham]

Sorry if this is the wrong list to ask this.. direct me to the correct 
list if so...

Question: I would like the kernel not to use any of the video hardware 
on the machine.  Is there any run-time kernel parameter I can pass to 
disable all video?  (I tried console= to direct output to the serial 
port, but ttys were still using the vga hardware.)  My video card is 
built onto the mother board, and there is no way I see to disable it 
from the BIOS. 

I was hoping there was an option such as vga=disable or video=null or 
something like that, but I've looked thru the docs and cannot find anything.

Thanks,
  Davy

Re: disabling all video

[Yapo Sebastien]

> Question: I would like the kernel not to use any of the video hardware
> on the machine.  Is there any run-time kernel parameter I can pass to
> disable all video?  (I tried console= to direct output to the serial
> port, but ttys were still using the vga hardware.)  My video card is
> built onto the mother board, and there is no way I see to disable it
> from the BIOS.
>
Remove "if EMBEDDED" in the VT and VT_CONSOLE section of drivers/char/Kconfig 
then reconfigure your kernel.
You should find the old VT options in Device Drivers  -> Character devices

Regards

Sebastien

Re: disabling all video

[Davy Durham]

Yapo Sebastien wrote:

>>Question: I would like the kernel not to use any of the video hardware
>>on the machine.  Is there any run-time kernel parameter I can pass to
>>disable all video?  (I tried console= to direct output to the serial
>>port, but ttys were still using the vga hardware.)  My video card is
>>built onto the mother board, and there is no way I see to disable it
>>from the BIOS.
>>
>>    
>>
>Remove "if EMBEDDED" in the VT and VT_CONSOLE section of drivers/char/Kconfig 
>then reconfigure your kernel.
>You should find the old VT options in Device Drivers  -> Character devices
>
>  
>
Aww, is there no way to disable it at run-time?  I'm working with a 
precompiled kernel.

Perhaps there's a trick to disable the card with a special interrupt?  
Set the terminal parameters to blanked from the kernel parameter line 
(like setterm does)

Thanks

Re: disabling all video

[Davy Durham]

Perhaps is there a way/trick to accomplish this by explicitly breaking 
(*at* runtime/kernel-parameter-time) the vga support that wouldn't cause 
a panic?

Yapo Sebastien wrote:

>>Question: I would like the kernel not to use any of the video hardware
>>on the machine.  Is there any run-time kernel parameter I can pass to
>>disable all video?  (I tried console= to direct output to the serial
>>port, but ttys were still using the vga hardware.)  My video card is
>>built onto the mother board, and there is no way I see to disable it
>>from the BIOS.
>>
>>    
>>
>Remove "if EMBEDDED" in the VT and VT_CONSOLE section of drivers/char/Kconfig 
>then reconfigure your kernel.
>You should find the old VT options in Device Drivers  -> Character devices
>
>Regards
>
>Sebastien
>-
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>

Re: disabling all video

[Randy.Dunlap]

On Sat, 07 Aug 2004 14:15:48 -0500 Davy Durham wrote:

| Perhaps is there a way/trick to accomplish this by explicitly breaking 
| (*at* runtime/kernel-parameter-time) the vga support that wouldn't cause 
| a panic?

Perhaps there could be a way (most likely there could be), but there
isn't a way currently that I can find in source files or in
Documentation/kernel-parameters.txt .


| Yapo Sebastien wrote:
| 
| >>Question: I would like the kernel not to use any of the video hardware
| >>on the machine.  Is there any run-time kernel parameter I can pass to
| >>disable all video?  (I tried console= to direct output to the serial
| >>port, but ttys were still using the vga hardware.)  My video card is
| >>built onto the mother board, and there is no way I see to disable it
| >>from the BIOS.
| >>
| >>    
| >>
| >Remove "if EMBEDDED" in the VT and VT_CONSOLE section of drivers/char/Kconfig 
| >then reconfigure your kernel.
| >You should find the old VT options in Device Drivers  -> Character devices
| >
| >Regards
| >
| >Sebastien


--
~Randy