I'm posting this first of all to share in case someone else runs into my problem and second of all to ask where I report the problem more specifically.
Recently I have installed Ubuntu Mate 22.04 on 3 slightly older machines: a Samsung, an Asus, and a Dell. (Hoping to get it on my HP soon.) At least 2 of those 3 installs (definitely the Dell and Asus), possibly all three, had a desktop crashing issue that took awhile to figure out.
After hunting around a lot each time, I discovered each time that redshift seems to be causing the desktop crash. After uninstalling redshift (which was a default install with Ubuntu Mate 22.04), each machine has so far worked wonderfully.
When I could, when prompted, I would report the crashes. But I wanted to post it here both to ask if there was another place I could report it and also so that if someone else looks up desktop crashes (or getting kicked out to the log in screen) they might try uninstalling redshift.
Thanks.
/var/crashfor a .crash file with the time/date that matches the issue you experienced, and report using that file, ie.ubuntu-bug /var/crash/[filename from directory].crash. I'd also peruse that file for some clues as to issue, FYI: I use redshift & have had no issues; so I'd likely also check your config file doesn't contain errors.. – guiverc Aug 01 '22 at 06:01