Approximately once every 1 to 3 days of uptime, the system experiences a sudden and inexplicable crash: The image completely freezes in place, although unlike similar crashes in the past I can keep moving the mouse pointer around. A few seconds afterward, I find myself in a black console... and a few seconds after that, I'm back at the login screen. If I attempt to log back in however, the image either freezes again or desktop effects are no longer working without any error message as to why. Not even forcefully restarting X11 (control + alt + backspace twice) fixes the remaining glitches, and the only way to truly recover the system is to also reboot.

The crashes are completely random, but always caused by a desktop event... however it is not exclusive to desktop effects! The freeze will occur even with compositing completely disabled, although slightly more rarely. It seems to occur either when some desktop effects are playing (like the desktop switching cube animation) but it's usually when I select a new window or a panel pops up (alt-tab switching to another window can alone trigger this).

I use the free video drivers and default system packages, all latest versions of openSUSE Tumbleweed. My card is a Radeon R7 370, GCN 1.0 on RadeonSI.

https://bugs.kde.org/show_bug.cgi?id=380008

Important: This is a mirrored report of an older issue, which has been happening for nearly 3 months now. I decided to post it here as well because it seems like it might be KDE related, considering only Plasma Desktop / KWin appears to trigger this specific crash. The original reports with openSUSE and OpenDesktop can be found below, their comments contain more information about what has been happening as I've been noticing it:

https://bugzilla.opensuse.org/show_bug.cgi?id=1028575
https://bugs.freedesktop.org/show_bug.cgi?id=100306

This is a major problem and I'm trying to find a solution for it ASAP! Any feedback worth sharing is welcome, and I'd like to know of any possible fix or workaround. Please don't suggest desktop compositing however, as I've already verified that the issue takes place with it turned off.