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SubjectRe: [PATCH,CFT] Tentative fix for agpgart (writing on 'reserved' bits)
Alessandro Morelli wrote:

>
> Hello
> I managed to get rid of customers, in order to test the patches....
> Bad news...no change...

At least it is not worse (I hope ...) ;-)


> I'm starting to believe I'm mad...my PC works like charm without AGP and
> gets all mixed when I enabled it...

Does it start messing right after you enable it, or only after you write
to it (starting X...) ?

> What kind of information can I provide (/proc readings, tests, etc.) to
> shed some light?
>
> Could this be a case of interaction between AGP and VM?
>
> tlb-flush weirdness?
>

Apart from this kinda usual write-on-reserved-bits in the AGP
initialization, which has been done before on various chipsets and
almost never caused any trouble, I saw no blatant errors that may lead
to such things... In fact, we have several PCs with i815 chipsets in the
lab. People are using AGP without any troubles. The only difference is
that we run an old kernel version (2.4.3-13, thanks the sysadmin for
never upgrading....), and we have a different graphic card (Matrox).

Alan, do you have any idea about this one ?

Best regards
--
Nicolas Aspert Signal Processing Institute (ITS)
Swiss Federal Institute of Technology (EPFL)


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