Hi, I started experiencing this major bug in one of the recent Plasma/KDE/KF5 updates for openSUSE Tumbleweed (within the past week). Very frequently (within an hour or less) I notice that the Plama panel clock stops updating, and the App Menu and Calendar popups stop rendering (just the outline), and notification popups show black with a copy of the panel underneath. When I restart `plasmashell` it fixes it for a while, but later starts glitching again. This is on a Thinkpad T530 laptop with integrated Intel graphics, running the X modesetting drivers (not xorg-intel driver). I tried switching the KWin compositor from X11 rendering to openGL, but it made no difference.
Created attachment 121397 [details] Opening the popup calendar widget
Created attachment 121398 [details] A popup notification (Firefox browser in background)
Hi, I tried switching to the official Intel driver for Xorg, but it is giving me the same trouble.
Same problem Kubuntu 19.10 Plasma 5.16 Link to my screenshot https://hkar.ru/10964 I think it is not a Kwin problem, because restart Kwin doesn't help, but restart plasmashell fix this
Created attachment 123819 [details] Notification screenshot
Although I suspect that something KDE-related was janky, but for me it turned out to be related to the kernel version: https://bugzilla.opensuse.org/show_bug.cgi?id=1140777 It started happening somewhere in the kernel 5.1.x lifecycle, and was resolved with kernel 5.2.
I use kernel 5.3 and bug is still present. I think it is not kernel problem
Any news? Bug is still present in Kubuntu 20.04