https://bugs.kde.org/show_bug.cgi?id=363079
--- Comment #7 from Thomas Lübking <thomas.luebk...@gmail.com> --- The intel driver is unloaded (you're on the modesetting driver alongside glamor) and you're on xrender compositing. (But I do not understand why, your IGP seems supported by the intel driver version and it should™ take precedence on autoconfiguration if available) Can you please also attach the output of glxinfo > ~/glx.info I assume you'll encounter the same problems with suspended compositor (so not a kwin issue at all) and suspect a driver bug, triggered by firefox et al. (they still operate on OpenGL) directly. I's propose to try to enforce intel and disable glamor for a beginning. add a file /etc/X11/xorg.conf.d/20-intel.conf (requires root permissions) with the content: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "sna" EndSection respecitvely alter any present file itr. If this doesn't help, try to even fallback to Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "uxa" EndSection Then restart X11 (logging out and back in should be sufficient, in doubt reboot ;-) Ensure that the intel driver doesn't get unloaded in /var/log/Xorg.0.log after those changes. -- You are receiving this mail because: You are watching all bug changes.