Created attachment 170600 [details] Example of garbled user icon SUMMARY User icon seems corrupted in application launcher until the user icon is changed STEPS TO REPRODUCE 1. Reboot 2. Open the application launcher OBSERVED RESULT See attachment. EXPECTED RESULT Icon should be a smaller version of the one seen in the System Settings SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6.9.4-1 (available in About System) KDE Plasma Version: 6.0.5 KDE Frameworks Version: 6.3.0 Qt Version: 6.7.1 ADDITIONAL INFORMATION Using an AMD iGPU
Created attachment 170601 [details] Showing the garbled user icon in particular
This looks to me like GPU driver issue, but we've also seen cache issues with the Kickoff user icon before. CCing some folks with some familiarity with the issue.
IIRC it is an upstream issue with QtQuick not refreshing the texture buffers after waking up from sleep. Textures would contain a garbage data and need to be redrawn, but QtQuick doesn't realize that and keeps it cached that way until the Item source is changed in a way that requires redrawing it. This is why KWin has "graphical effects have been reset" notification — to fix the same bug on a window manager level, so that the whole window surfaces and effect's texture won't stay garbled. So, probably RESOLVED UPSTREAM, but I'll let KWin wizards say it for sure.
It was, in fact, a GPU driver issue. I was on Tumbleweed, which has been having issues with the Mesa driver. A fix was just pushed out that resolved this issue.