Comment # 1 on bug 1028575 from Mircea Kitsune

This continues to be a huge issue with the latest Tumbleweed packages! The
system now freezes and crashes on a hourly basis. It's likely something
triggering a GPU crash, as it only seems to happen the moment certain desktop
effects occur or given panels pop up; Even bringing up the taskbar (from
auto-hide) or clicking the arrow which expands the system tray can cause it.

The only way to recover the system without restarting is to immediately hit
"control + alt + backspace" to kill x11 once noticing the freeze, before it has
time to become permanent or the glitches I mentioned take place. Can anyone
else confirm this please, and let us know whether a solution is being worked
on?