I have been having an issue where my desktop take 90 seconds to reboot for a few weeks now. Just yesterday I removed quiet from my grub.cfg and saw the errors found in the attached images.
After looking around the web I saw someone mention it might be an issue with SDDM but I am not certain and could not find how exactly they solved it. I assume I would just switch to GDM or whatever else there is. I am not certain though if this is the issue because I have also had issues with the stability of plasmashell on Wayland. These could be two separate problems but I am not aware of how I would even test that.
For those who are more knowledgeable than me, what does this look like to you? Do I need to attach more information?
If it’s waiting for a user session to end then you have something running in the background when you shut down - check your processes and services. It could be something that requires network access but the network went down before the process finished.
This is a good idea, but also be aware that things like profile-sync-daemon and anything-sync-daemon might need some time to sync files to disk on exit, especially with slower disks.
For that, check this stack exchange post.
If you do a ls /etc/systemd/system/ you’ll see the node name you’ll want to edit is display-manager.service Don’t edit the file directly. Read the entire post.
It would be better though to try and find out what is preventing your display manager from exiting properly instead of having systemd timeout and send a kill signal. But, I can understand not wanting to wait 90 seconds while troubleshooting
