[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 #8 from Andy Furniss <adf.lists at gmail.com> ---
(In reply to comment #5)
> The problem is Unigine don't know how to use GLSL, again.
> 
> There is "#extension GL_ARB_sample_shading : enable" in the middle of (all?)
> shaders. This is not allowed by any GLSL specification. All #extension
> directives must occur before any non-preprocessor tokens, which pretty much
> means "at the beginning of shader code".
> 
> What I see: Valley is loading. Then there is hang and it recovers
> successfully. After that, Valley seems to have exited. That's all.

It's repeatedly more serious than that for me - maybe because I am fullscreen?

But anyway if I don't sysrq quickly enough when the monitor goes off I am in
ext4 bitching about disk errors territory after I hard reset, so no waiting to
see if the GPU reset works for me (which it never seems to do on SI - but then
I haven't had this card for long).

Heaven 4.0 is also affected, but I don't lock with that - it renders junk but I
can quit OK, after that there is a 90% chance my display is mostly trash. fbcon
is OK when I quit X, but restarting X will still result in trashed display.

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