SUMMARY Plasmashell hangs/crashes sporadically after wakeup from monitor standby (monitor power off) and needs to be restarted. The problem could be traced back to the "vsync" options in the compositor settings by trial and error. No log entries related to the issue could be identified. Setting vsync to "Never" prevents the "crash". WORKAROUND: Set vsync to "Never". Enable the "TearFree" option in amdgpu configuration to prevent tearing. STEPS TO REPRODUCE 1. Connect at least 2 monitors with a different standby and switch off behaviour. 2. VSYNC to e.g. Automatic 3. sleep 1; xset dpms force standby 4. Wake up by keyboard or mouse after ~30 seconds OBSERVED RESULT Task bar and desktop (including widgets) do not appear. Wallpaper stays black. KRunner still works. Plasmashell restart required: kquitapp5 plasmashell && kstart5 plasmashell EXPECTED RESULT The same desktop environment / layout as before the standby. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 20.10 (available in About System) KDE Plasma Version: 5.19.5 KDE Frameworks Version: 5.74.0 Qt Version: 5.14.2 Mesa: 20.2.1 HARDWARE: Radeon RX 580 4GB AORUS GIGABYTE GA-X79-UD5 i7-3930K ADDITIONAL INFORMATION https://forum.kde.org/viewtopic.php?f=289&t=168162&start=15
X11 or Wayland?
Ah, nvm, X11
Yes X11. I just tested Wayland regarding this issue. On a Wayland session I ran into similar problems like: https://bugs.freedesktop.org/show_bug.cgi?id=109246 My primary display elements switches to the secondary. --> Panels, widgets and wallpaper are all moved to the secondary (smaller) monitor when the monitor standby was triggered and the monitors did not switch off. One time I also had to reboot the system via SysRq keys. I've decided to stick with my workaround on X11 until Plasma 5.20 is released on Kubuntu.
Is this still a problem? I haven't encountered this issue with Plasma 5.27.5 or 5.26.1 with amdgpu (tested with the APU of a Ryzen 7 4800H and a Steam Deck)
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!