I am running Debian 8 (Jessie) using the default Gnome desktop and installation.
Sometimes I will be logged off Gnome and brought back to the graphical login screen where I must enter my password. When I log back, all programs will have been closed and I am brought back to a fresh desktop. This is happening at irregular intervals.
How can I diagnose this problem?
Is there a file that would contain information to help me find the source of the error?