[Bug 79659] R9 270X lockup with unigine valley since radeonsi: enable ARB_sample_shading

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79659

--- Comment #18 from Marek Olšák <maraeo at gmail.com> ---
(In reply to Alexander Tsoy from comment #15)
> Ah.. "st/mesa,gallium: add a workaround for Unigine Heaven 4.0 and Valley
> 1.0" is also included in mesa-10.3. So both Heaven 4.0 and Valley 1.0 should
> just work. The question is why ARB_sample_shading is causing GPU lockup on
> VERDE. Should I open a separate bug for this issue?

I can re-test VERDE when I get home.

I haven't investigated why the hw hangs, because it only happens if shader
compilation fails and so none of the sample_shading shader stuff makes it to
the driver. I think the likely cause is that Unigine attempted to do rendering
with a shader that hasn't actually been compiled and things went wrong after
that.

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