[Mesa-dev] WebGL test suite, and whitelisting drivers / OpenGL implementations in Firefox

[Alex Deucher]

On Mon, Jan 17, 2011 at 10:00 AM, Corbin Simpson
<mostawesomedude at gmail.com> wrote:
> On Mon, Jan 17, 2011 at 1:11 AM, Dave Airlie <airlied at gmail.com> wrote:
>>
>> Results: (5231 of 5344 passed, 3 timed out)
>>
>> This was with the latest Intel mesa driver on an Ironlake laptop.
>>
>> However I got a random crash on a previous run, I'm guessing if we can
>> figure out the misc crasher we'd be in a lot better place.
>
> I already started working on this. (A friend just got hired by Moz and
> I owe him one.)
>
> Basic analysis: The crash is in the Mesa-side DRI2 handler for
> flushing the frontbuffer. There's a segfault of very weird
> composition. The BT (which I can get if needed) goes back to
> glXMakeCurrent, and it looks like glXMakeCurrent is unbinding the
> current context, which is calling the DRI2 unbind callbacks, which
> calls frontbuffer flush, but part of the DRI2 context is screwy and we
> get a segfault.
>
> There's a couple problems though. The frontbuffer flush usually isn't
> fatal; it only kills us about one in five times. Sometimes it dies on
> the very first test, sometimes it dies halfway through the suite.
> There's no rhyme or reason to it.
>
> If you've got any ideas, I'm open to them. I bugged Kristian and he had no idea.
>

Sounds like this bug:
https://bugs.freedesktop.org/show_bug.cgi?id=31940

Alex

> --
> When the facts change, I change my mind. What do you do, sir? ~ Keynes
>
> Corbin Simpson
> <MostAwesomeDude at gmail.com>
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