[Bug 98520] System randomly crashes / freezes while playing certain games

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98520

--- Comment #14 from Itzamna <xamaniqinqu at gmail.com> ---
I would like to confirm this bug. Since a world update yesterday, 3D
acceleration has become unusable due to random freezes. Just like
MirceaKitsune, I am running on KDE (Plasma 5.8.3) and am on a rolling release
distribution (Gentoo). I have tried several kernel, Mesa and libdrm versions,
but the freezes prevail.
After a freeze occurs, I can SSH into my system and it is otherwise responsive;
except for being unable to kill the X server or display manager (sddm).
Switching KWin's rendering path to XRender prevents hangs from occurring when
on the desktop; the OpenGL 3.3 and 2.0 rendering paths will provoke hangs.

When my system hangs, dmesg shows no related messages at all; Xorg.0.log shows
nothing out of the ordinary either. Any suggestions on how to obtain useful
debugging information is welcomed.

My system information is as follows:

Linux kernel version: 4.9.0
Mesa version: 13.0.2
LLVM version: 3.9.0-rc1
libdrm version: 2.4.76
Video card: RX 460 4GB
Processor: Intel Core i7-5775C

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