Bug#523415: corrupted rendering

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Kurt Roeckx wrote:
> On Thu, Apr 16, 2009 at 08:09:30PM +0200, Frederic Peters wrote:
>   
>> Brice Goglin wrote:
>>
>>     
>>> So now, booting 2.6.29 and doing as root
>>>     echo "base=0x0e8000000 size=0x8000000 type=write-combining" > /proc/mtrr
>>> might give you the same MTRR back, and might even fix your problems.
>>>       
>> Same corrupted display for me after updating MTRR, too bad :(
>>     
>
> I was under the impression that 2.6.29 already had this, and
> 2.6.28 didn't.  So that would mean you would have to remove it
> in 2.6.29, and I have no idea if you can do that, and how.
>   

echo disable=2 > /proc/mtrr

(where "2" comes from "reg02" in cat /proc/mtrr)

http://www.mjmwired.net/kernel/Documentation/mtrr.txt

Brice