Re: VESA fb console in 2.6.15

From: Antonino A. Daplas
Date: Tue Nov 22 2005 - 19:33:08 EST

Andrew Morton wrote:
> Damien Wyart <damien.wyart@xxxxxxxxx> 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@xxxxxxxxx> [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.


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