On wayland with an external monitor connected the screen doesn’t return after the monitors are sent to standby. STEPS TO REPRODUCE 1. Have multiple monitors connected 2. Idle long enough for the screen-lock to appear and the monitors to go into standby 3. move the mouse cursor / switch to terminal and back OBSERVED RESULT The monitors stay black only the mouse cursor is drawn on the external monitors. It’s not possible to move it to the other moniter. I’ve also tried unplugging the external monitor. Then the black screen and cursor move the laptop’s monitor. EXPECTED RESULT Lock screen appears and I can unlock the desktop. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Gentoo KDE Plasma Version: 5.20.0 KDE Frameworks Version: 5.74.0 Qt Version: 5.15.1 ADDITIONAL INFORMATION Before the upgrade to 5.20.0 I’ve used 5.19.5 which had the same issue, but the lock-screen would reappear most of the times after switching to another VT and back again.
I seem to have the same problem as well. The only thing I can do is hit the reset button on my PC. For now, I just disabled locking. Let me know how to get debugging info if it's needed. I use two HP screens (25ES, 22cwa) if that helps. Plasma 5.20 of course OS: OpenSuse Tumbleweed CPU: Ryzen 2600X GPU: Radeon RX 5600XT
I think this bug may be related to LatteDock (it says something about Wayland in the backtrace). I disabled screen locking and let my pc sit for 20 minutes. I came back to three separate crashes that happened around the same time. Here are those backtraces: kactivitymanagerd - https://pastebin.com/Gx9Pf1Gp kde connect dameon - https://pastebin.com/W1HfvKN9 latte dock - https://pastebin.com/aF9UhQuS
This bug should be fixed after updating Qt to 5.15.2 and rebuilding kwayland-server against it. *** This bug has been marked as a duplicate of bug 426293 ***
Thank you, what I tried did not work anyways.