ubuntu-x-swat team mailing list archive

[eagles051387 <eagles051387@xxxxxxxxx>]

for me and my issue with nvidia freezing it seems to be solved in the
alpha in karmic. could this be an issue with jaunty kernel?

On 5/18/09, Albert Damen <albrt@xxxxxxx> wrote:
> Based on Eric Anholt's findings about freezes due to prefetching beyond
> end of aperture (b.fd.o 21488), I have done some testing.
>
> With Eric's patch applied in kernel 2.6.30-rc6 I still got the freeze. That
> seemed to make sense: we are using EXA, and the exa offscreen buffer is
> using the last page in aperture. So BO's wouldn't use the last page in our
> case anyways.
> Then I patched -intel and pushed back the exa offscreen buffer 4 kB below
> end of aperture (0x0ed3f000-0x0fffefff: exa offscreen). That still gave the
> freeze.
> Then I pushed a bit harder, now by 32MB (0x0cd40000-0x0dffffff: exa
> offscreen) --> No freeze anymore.
>
> The 32MB was not a random choice: it matches the 32 MB classic texture
> buffer we had until beginning of April, which was sitting between exa
> offscreen and end of aperture. Dropping patch 118_drop_legacy3d.patch,
> which removed the (unused) classic texture buffer, also solves the
> freeze issue for me. So maybe that patch (dated 1 April) has been the
> trigger for this bug?
>
> Now the question is: Is something writing or reading beyond the end of
> the exa offscreen buffer? Without the 32 MB unused memory after the exa
> offscreen buffer, that would be beyond end of aperture. How can I find
> what is doing that?
>
> --
> [i965] X freezes starting on April 3rd
> https://bugs.launchpad.net/bugs/359392
> You received this bug notification because you are a direct subscriber
> of the bug.
>


-- 
Jonathan Aquilina

-- 
[i965] X freezes starting on April 3rd
https://bugs.launchpad.net/bugs/359392
You received this bug notification because you are a member of Ubuntu-X,
which is the registrant for xf86-video-intel.