[Bug 78547] GPU hang (EIR stuck) when trying to launch XBMC

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78547

--- Comment #14 from malstrond at gmail.com ---
I'd have to recompile a lot of stuff to use older mesa versions, since it's a
rolling release distro.

However I found out something new:
The same GPU hang with "EIR stuck" also occurs when using xrandr or lxrandr. 
No resolution change, simply executing "xrandr" from lxterminal or starting
lxrandr to show the current setting causes the GPU to hang. 
But after X has locked up, I can still execute it with "DISPLAY=:0 xrandr" via
SSH and get the correct output. If I change the mode, xrandr output reflects
that (* next to a different mode), but the display stays unresponsive. I can
also turn the display off, and it really gets turned off. Turning it back on
again yields the same solid color it was before though. While doing this lots
of call traces appear in the kernel log again.
If I try to execute "DISPLAY=:0 xrandr" from SSH after clean boot, the same
crash occurs, but xrandr runs produces the correc output.

Since XBMC tries to change the display mode on startup because it normally runs
in fullscreen and mplayer/mpv don't try to change the mode, this might be the
same issue.

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