I'm running a Kali Linux with KDE Plasma and encountered an issue where I cannot logout/reboot or shutdown.
I tried adding
reboot=bios to the
GRUB_CMDLINE_LINUX_DEFAULT, but it didn't work.
The issue is that whenever I try to shutdown or reboot the PC it freezes, the cursor dissapears and the screen remains frozen basically forever. I had the absolutely same problem with GNOME before and that's the main reason I decided to switch to KDE Plasma, but it didn't fix the problem.