[Bug 80419] XCOM: Enemy Unknown Causes lockup

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80419

--- Comment #70 from Kamil Páral <kamil.paral at gmail.com> ---
Created attachment 120594
  --> https://bugs.freedesktop.org/attachment.cgi?id=120594&action=edit
kernel messages from xcom hang

I'd like to help with resolving this. I added GALLIUM_DDEBUG=800 and checked
using environ file that it is applied. Interestingly, I see no performance
degradation (am I doing something wrong?). I have played XCOM for about 3 hours
(which seems to be considerably longer than usual), then it got stuck. The
screen got black for 10 seconds, then image returned, and I could move the
mouse pointer, but do nothing else. I was able to switch to tty3, but when I
switched back, it froze completely, and I had to use sysrq to reboot. The hang
is visible in kernel messages, it is attached.

There is no /home/$username/dd_dumps/ directory. I wonder whether the
GALLIUM_DDEBUG variable is having any effect? Also, I can't find any
documentation to it, the only thing I was able to find is this:
https://patchwork.freedesktop.org/patch/57799/

Inspired by comment 66, I tried GALLIUM_DDEBUG=help (like "GALLIUM_DDEBUG=help
glxgears"), but nothing is written to stdout.

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Curacao PRO [Radeon R7 370 / R9 270/370 OEM] [1002:6811]
kernel-4.2.8-300.fc23.x86_64
mesa-dri-drivers-11.0.6-1.20151122.fc23.x86_64
xorg-x11-drv-ati-7.6.0-0.4.20150729git5510cd6.fc23.x86_64
xorg-x11-server-Xorg-1.18.0-2.fc23.x86_64
llvm-libs-3.7.0-1.fc23.x86_64
Fedora 23

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