* Re: Force FB off
2010-12-15 13:39 ` Jan Engelhardt
@ 2010-12-15 14:51 ` Rui Santos
2010-12-15 18:40 ` Geert Uytterhoeven
1 sibling, 0 replies; 5+ messages in thread
From: Rui Santos @ 2010-12-15 14:51 UTC (permalink / raw)
To: Jan Engelhardt; +Cc: linuxppc-dev, linux-fbdev, Dave Airlie
Hi Jan,
You could boot with "vga=normal i915.modeset=0". This will provide
you with a 25x80 console.
You can also use vga=ext for an somethingx50 console.
Regards,
Rui
On 15-12-2010 13:39, Jan Engelhardt wrote:
> On Tuesday 2010-12-14 21:18, Dave Airlie wrote:
>> On Wed, Dec 15, 2010 at 3:41 AM, Jan Engelhardt<jengelh@medozas.de> wrote:
>>
>>> booting with video=off nor video=i915:off has any effect on skipping
>>> FB. What is the correct option to stop FB from taking over my boot
>>> consoles?
>> For KMS its not fb taking over its the drm i915 driver, nomodeset will
>> stop it however X will no longer work since it relies on the kernel
>> driver.
> That would make sense. Furthermore I discovered that video=vesafb:off
> also has no effect, but here it is clear because the source code ignores
> the return value of fb_get_options, and so ignores any off command.
>
> The real strange thing is that video=offb:off on an Apple Xserve G5
> PPC64, while probably skipping OFFB initialization, still ends up in a
> 640x480 mode with a 8x16 font instead of retaining the PROM
> console/font.
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>
--
Cumprimentos
*Rui Santos*
Email: rsantos@grupopie.com <mailto:rsantos@grupopie.com>
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Force FB off
2010-12-15 13:39 ` Jan Engelhardt
2010-12-15 14:51 ` Rui Santos
@ 2010-12-15 18:40 ` Geert Uytterhoeven
1 sibling, 0 replies; 5+ messages in thread
From: Geert Uytterhoeven @ 2010-12-15 18:40 UTC (permalink / raw)
To: Jan Engelhardt; +Cc: linuxppc-dev, linux-fbdev, Dave Airlie
On Wed, Dec 15, 2010 at 14:39, Jan Engelhardt <jengelh@medozas.de> wrote:
> On Tuesday 2010-12-14 21:18, Dave Airlie wrote:
>>On Wed, Dec 15, 2010 at 3:41 AM, Jan Engelhardt <jengelh@medozas.de> wrote:
>>
>>>
>>>booting with video=off nor video=i915:off has any effect on skipping
>>>FB. What is the correct option to stop FB from taking over my boot
>>>consoles?
>>
>>For KMS its not fb taking over its the drm i915 driver, nomodeset will
>>stop it however X will no longer work since it relies on the kernel
>>driver.
>
> That would make sense. Furthermore I discovered that video=vesafb:off
> also has no effect, but here it is clear because the source code ignores
> the return value of fb_get_options, and so ignores any off command.
>
> The real strange thing is that video=offb:off on an Apple Xserve G5
> PPC64, while probably skipping OFFB initialization, still ends up in a
> 640x480 mode with a 8x16 font instead of retaining the PROM
> console/font.
That just means something different than offb is driving the console now.
What does /proc/fb say?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 5+ messages in thread