https://bugs.kde.org/show_bug.cgi?id=370352
--- Comment #1 from Martin Gräßlin <mgraess...@kde.org> --- This doesn't sound like a problem in our software, but rather in deeper in the stack (Xorg, OpenGL driver or drm). First of all: if you are using Intel hardware please switch from xorg-intel to xorg-modesettings driver and check whether the problem persists. If that doesn't help, please try to investigate a little bit more. E.g. check with dmesg or in /var/log/messages and /var/log/Xorg.0.log for error messages related to what you see. Also try to unlock the system without using the greeter: loginctl unlock-sessions -- You are receiving this mail because: You are watching all bug changes.