[CentOS] GUI/X11 login and shells other than bash?

Sat Dec 16 21:35:02 UTC 2017
Gordon Messmer <gordon.messmer at gmail.com>

On 12/15/2017 10:24 AM, Valeri Galtsev wrote:
> if they attempt to log in just by giving their UNIX
> username, their X11 session "crashes", meaning that after attempting to
> start, it just trows one back to GUI/X11 login screen.

Log in over ssh and run "journalctl -f" while such a user attempts 
login.  Do you see anything useful logged after the user attempts login?