SUMMARY kscreenlocker_greet will not allow me to log in after locking the screen for a while. STEPS TO REPRODUCE On a fresh Kubuntu 24.04 system with two monitors: 1. In "System Settings > Power Management > Energy Saving > On AC Power" check that Suspend Session is set to "Lock Screen" (not Sleep). 2. Go away for a while. 3. When returning, click a key or move the mouse to activate the screen. 4. Can't login. OBSERVED RESULT One of two things happens: 1. The password text box does not appear at all (just the background image). 2. The password box appears but will not accept keyboard input. (Mouse pointer is active) To recover I have to ctrl-alt-F3 to get a terminal, login, then kill -9 the kscreenlocker_greet process. After that the kglobalaccel process will start consuming 100% of CPU so I have to kill that process too. Once I do that I can ctrl-alt-F2 to get back to the GUI lock screen, wait a few seconds, the login password box appears and I can log in. If I leave the system alone long enough for the screen to lock the same thing happens again. EXPECTED RESULT I should be able to log back into the system. SOFTWARE/OS VERSIONS Hardware: System76 Serval WS laptop with external HDMI-connected monitor Operating System: Kubuntu 24.04 KDE Plasma Version: 5.27.11 KDE Frameworks Version: 5.115.0 Qt Version: 5.15.13 Kernel Version: 6.9.3-76060903-generic (64-bit) Graphics Platform: offscreen Processors: 32 × 13th Gen Intel® Core™ i9-13900HX Memory: 62.6 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 4070 Laptop GPU/PCIe/SSE2 ADDITIONAL INFORMATION
Unfortunately Plasma 5.27 is EOL and unmaintained at this point, having been first released almost two years ago. I'd recommend upgrading to Kubuntu 24.10 which will at least get you Plasma 6.15., which is over a year and a half newer. Thanks for understanding! And if after upgrading, you still encounter this exact same issue, please feel free to re-open the bug report.
I've been sticking with LTS releases since 14.04 due to driver support but maybe that's no longer necessary. I'll give 24.10 a shot.
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Updated to Kubuntu 24.10 and "Lock Screen" is no longer an option under "Suspend Session". Since you can't pick the configuration I used that caused lockups, I guess it's kind-of fixed? $ kinfo Operating System: Kubuntu 24.10 KDE Plasma Version: 6.1.5 KDE Frameworks Version: 6.6.0 Qt Version: 6.6.2 Kernel Version: 6.9.3-76060903-generic (64-bit) Graphics Platform: Wayland Processors: 32 × 13th Gen Intel® Core™ i9-13900HX Memory: 62.6 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 4070 Laptop GPU/PCIe/SSE2