[Bug 52005] wmvcore:wmvcore crashes in Wine on cw-gtx560

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52005

--- Comment #6 from Zebediah Figura <z.figura12 at gmail.com> ---
(In reply to François Gouget from comment #5)
> (In reply to Zebediah Figura from comment #4)
> [...]
> > Except that with nouveau, kernel synchronization is bad enough that even
> > asking for available formats (and creating test surfaces?) causes a GPU
> > reset.
> 
> Do you know if there is already a Vaapi / Nouveau bug tracking this issue?
> It would be nice to have a pointer to it to be able to track progress on
> this.
> And if there is no such bug report it would be nice if you could create one.

Unfortunately there seems to be no single bug report for "nouveau doesn't
support multithreading". When I asked about it in #dri-devel
<https://gitlab.freedesktop.org/mesa/mesa/-/issues/3518> was suggested, but
this is also only one of a slew of similar reports (just an unusually detailed
one).

> > So obviously nouveau should be fixed, but in the meantime, probably the best
> > thing to do is disable libva acceleration on the relevant machines.
> 
> I have removed the gstreamer1.0-vaapi packages from the cw-gtx560 machine.
> This should be the only TestBot machine that's impacted. A quick test does
> show that the crash no longer happens. This should show up on tomorrow's
> WineTest results.
> 
> What are the impacts for Wine users? Is it correct to assume that the
> presence of the gstreamer1.0-vaapi package(s) would have also broken video
> playback in other applications like VLC or Firefox+YouTube; thus making it
> essentially unusable anyway? Or does it mean they have to choose between a
> working Wine and video acceleration in other applications?

For platforms other than nouveau I assume it works just fine. For nouveau I
have to assume it's broken in general (at least, there's probably nothing that
Wine is doing differently than other GStreamer users in this respect).

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