Description of problem: Under certain circumstances the display and input methods freeze while trying to log in. No input is accepted via the keyboard, e.g. the Alt+SysRq combinations do not work. The computer is accessible remotely via ssh. Version-Release number of selected component (if applicable): This did not happen under Fedora 27 and only started after updating to 28. How reproducible: Steps to Reproduce: 1. User A establishes a graphical login session. 2. User B establishes a concurrent graphical login session 3. User B logs out 4. User A attempts to log in again. Actual results: The login for user A fails to ever return. At this point I try Ctrl-Alt-F1 to get back to the 'choose a user screen'. However, logging in from this virtual terminal never succeeds. Then I have tried Ctrl-Alt-F2, which seems to be associated with user A. I can successfully log in, but the session is not fully functional, e.g. starting applications like Terminal never succeed. I suspect that the user actually has two sessions at this point but I do not know how to verify that. Once the computer is in this state if I need to log in again the system freezes and keyboard and mouse input cease to be recognized. It is necessary to log in remotely and reboot the system. Expected results: The existing session of user A is rejoined and all applications are functional. Repeated logins do not cause issues. Additional info: Let me know what I can do to provide more information and troubleshoot. I would also like to know if there is a less drastic step than rebooting which might repair the problem.
I forgot to mention in my original description - this started after updating from F27 to F28. Had none of this behavior in F27. Also, I have noticed that the "Switch User" option in the upper right Gnome menu, under the currently logged in user is not always present. (This is located where "Log Off" is, in case I have not been clear.
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Closing as we do not experience the problem in F29.