Bug#616301: xserver-xorg-video-radeon:screen goes black, system hangs after 2sec:[youtube(FF/Opera)-reset req.]

[Alex Deucher]

On Fri, Mar 4, 2011 at 8:50 PM, Ben Hutchings <ben at decadent.org.uk> wrote:
> On Fri, 2011-03-04 at 21:01 +0200, Faidon Liambotis wrote:
>> severity 616301 critical
>> thanks
>
> No, not unless it will affect a large proportion of users.
>
>> My system locks up whenever I click on a YouTube video link since
>> yesterday. I can probably live without YouTube :), but in any case this
>> shouldn't happen.
>>
>> This isn't a singled out case nor in exotic, possibly faulty, hardware.
>> It's on a standard 1½-year old Dell OptiPlex 780 desktop with a Radeon
>> HD card (one of the standard configurations) and this is on a stock
>> squeeze system.
>>
>> The findings so far seem to suggest this is a Mesa issue; I'd probably
>> file it under "Linux kernel bugs" (or even DoS bugs) but I'm not sure
>> where to properly file such bugs in the post-KMS stack world.
>
> If there is a kernel driver involved then it should be assigned to the
> kernel.  Even without KMS, a Mesa driver should be considered untrusted
> and should not be able to trigger a crash or hang.  With KMS, this
> applies to the X driver too.
>

With or without KMS, the userspace acceleration drivers can certainly
cause GPU hangs if the 3D engine is programmed with some combination
of commands it doesn't like.

Alex

> Ben.
>
> --
> Ben Hutchings
> Once a job is fouled up, anything done to improve it makes it worse.
>
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