GNOME Bugzilla – Bug 72563
Better error messages on failed login
Last modified: 2002-07-11 22:41:46 UTC
This bug report mentions various things but maybe display .xsession-errors on failure, and check for issues with /tmp files. https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=52938
Definitely. I have heard of a number of people who wasted hours because of this.
This has been fixed just before the stable release of 2.4. That is, when the session lasts a very short time, gdm allows you to view the .xsession-errors file