Message-ID: <4384C524.8070202@tmr.com>
Date: Wed, 23 Nov 2005 14:38:12 -0500
From: Bill Davidsen <davidsen@tmr.com>
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To: "Antonino A. Daplas" <adaplas@gmail.com>
CC: Damien Wyart <damien.wyart@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: VESA fb console in 2.6.15
References: <20051121215531.GA3429@localhost.localdomain>	<43826648.9030606@gmail.com>	<87oe4c7gbv.fsf@brouette.noos.fr> <20051122162226.41305851.akpm@osdl.org> <4383B880.80301@gmail.com>
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Antonino A. Daplas wrote:
> Andrew Morton wrote:
> 
>>Damien Wyart <damien.wyart@gmail.com> wrote:
>>
>>>>>I've noticed in several versions of 2.6.15 that VESA fb console
>>>>>seems completely broken : it draws screen in several very slow
>>>>>steps, making the whole display almos unusable. And it crashes
>>>>>*very* often, for example when switching to X. The computer is
>>>>>complety locked, and doesn't even respond to SysRQ.
>>>>>I use vga=0x31B as boot param.
>>>
>>>* "Antonino A. Daplas" <adaplas@gmail.com> [051122 01:28]:
>>>
>>>
>>>>Try booting with:
>>>>vga=0x31b video=vesafb:mtrr:3
>>>
>>>Thanks, this works fine with this param and also without any video=
>>>param. I had a default video=vesafb:mtrr:2 in my grub conf file because
>>>of mtrr problems a few kernel versions earlier (had been discussed
>>>extensively on this list). This setting doesn't work well in 2.6.15.
>>>
>>
>>Does 2.6.15-rc? work OK without any special boot options? (We want it to..)
>>
> 
> 
> From what I understand, before this, he needs video=vesafb:mtrr:2. (Because
> his machine defaults to write-back mtrr instead of write-combining). Now it
> works without any special boot options because I made vesafb default to
> nomtrr because of problems like this and conflicts with X/DRI.
> 
Thank you, I bet this fixes a problem I was having with a system which 
sometimes came up with video problems unless I used an mtrr parameter.
-- 
    -bill davidsen (davidsen@tmr.com)
"The secret to procrastination is to put things off until the
  last possible moment - but no longer"  -me

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