I installed the KDE spin of Fedora 44. I attempted to replace plasmalogin with GDM because it works better with fingerprint logins. I ran the following:
Logging in succeeded. However, after restarting the machine, I was no longer able to log in. After entering password or trying to log in with fingerprint, it returns back to login.
I’ve had long troubleshooting conversations with ChatGPT and Gemini with no result. I’ve tried to make a new user and log in with it–didn’t succeed. Autorelabel didn’t work. Logs didn’t have anything that could explain the problem, at least to my eye.
I highly prefer KDE over GNOME, but if a solution doesn’t exist, I can live with GNOME.
Youl will need to replicate the issue and then browse the output from journalctl to determine what precisely is happening when your successful login results in you being thrown back to the greeter,
If you don’t see anything obvious in the logs, you might check the man pages for the PAM modules you are using. Many of them will accept a debug parameter to increase the logging verbosity. Both pam_unix and pam_fprintd, for example, accept a debug paramenter.
Also, there is a pamtester package that can be useful for troubleshooting authentication problems.
I also use KDE with GDM. Plasmalogin manager is a trainwreck. I don’t understand your problem, but maybe try reinstalling f44, and next time, don’t use the --now flag. Just disable plasmalogin, enable GDM and reboot.
