Broken login (SDDM unable to mount Plasma 5.21)

English Install/Boot/Login
1

[FONT=&amp]Plasma 5.21 was fine until I rebooted. Then I found out that my login was broken. More precisely:

  • I am reaching SDDM, but there is no longer any selector to pick a specific session (Full Wayland, Wayland, X11).
  • SDDM fails to load the plasma workspace. The login screen is just frozen after I’ve input my credentials.
  • Brought up tty, checked journactl, to see a line reading: Invalid session /var/lib/sddm/.desktop
  • Forced by way with startplasma-wayland and this how I was able to post this thread. However, I have 0 plasma widget or panel and only kwin along with krunner seem to be operational.
  • Uninstalled, then reinstalled SSDM. Didn’t change anything.

Any help greatly appreciated. My main wish for now is to be able to completely repair SDDM.

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2

May be time to do some Cache housekeeping – BTW, thanks for the hint.

  • Isolate the “Multi-User Target” systemd state.
  • Clean out the directories under ‘/var/lib/sddm/’ …
  • Restore to the “Default” systemd Target – probably “Graphic” …
3

Hello and thank you for your reply. In fact before checking in on it I’ve been able to fix my issue by reinstalling sddm, plasma-workspace and plasma-wayland. I hope this hasn’t left behind some corrupted files that risk breaking my system one day.