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disabling all video

DISCUSSION Davy Durham 3 participants 5 messages Aug 6, 2004 – Aug 8, 2004

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#0 lore raw

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

#1 lore raw
Quoted 7 lines

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

#2 lore raw
Quoted 9 lines · Yapo Sebastien
Quoted 9 lines

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.

Quoted 5 lines

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

#3 lore raw
In reply to Yapo Sebastien

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?

Quoted 22 lines · Yapo Sebastien
Quoted 9 lines

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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#4 lore raw

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