linux-kernel - Re: Framebuffer drivers that break the boot on systemswithout the hardware

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Message-ID: <489F6253.3010703@keyaccess.nl>
Date:	Sun, 10 Aug 2008 23:49:07 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Frans Pop <elendil@...net.nl>
CC:	adaplas@...il.com, mingo@...e.hu, akpm@...l.org,
	linux-fbdev-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: Framebuffer drivers that break the boot on systemswithout the
 hardware

On 09-08-08 23:19, Frans Pop wrote:

> Rene Herman wrote:

>> Ingo Molnar posted a list of drivers he found to break the boot during
>> testing of randconfig kernels and among them are a number of FB drivers:
>>
>> FB_VESA
> 
> This one is set to "y" in the kernel configs for the generic Debian 
> kernels for i386 and x86_64 and is used by default for the graphical 
> version of the Debian Installer, so I'd be very surprised if it broke 
> very many systems...
> AFAIK it is only actually enabled if the 'vga=' boot parameter is passed.
> 
> Ingo's mail also lists FRAMEBUFFER_CONSOLE which again is set to "y" in 
> Debian's standard kernel configs for x86 (and probably most other 
> arches).

Okay. MDA_CONSOLE was also in there impying RAM at 0xb0000 which might 
indicate a gun/foot situation here...

>> (and FB_VIRTUAL)
> 
> This one should be fixed with 2.6.27-rc1. The commit that fixes it is:
>   commit b604838ac6d233fd6bffc0e758a818133a01ff22
>   Author: Frans Pop <elendil@...net.nl>
>   Date:   Wed Jul 23 21:31:26 2008 -0700
>     vfb: only enable if explicitly requested when compiled in

Ah, thanks.

Rene.

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