I believe it's:
but, I'm not sure if that's the right output, or if I'm posting the contents of the correct file.
Here's the error:
(I'll add it in a sec)
"Your session only lasted less than 10 seconds. If you have not logged out yourself, this could mean that there is some installation problem or that you may be out of diskspace [My edit: that's definitely not the case]. Try logging in with one of the failsafe sessions to see if you can fix this problem."
I was able to produce a Fluxbox option as a session option by adding a Fluxbox file to the /etc/X11/gdm/Sessions
directory. It contains:
edit: added the error message and /etc/X11/gen/gdm/Sessions comments, clarifications.