Spontaneous logout in linux mint 16?

Question

linux

There was a problem that at a certain moment, I can’t understand at what point, a spontaneous exit from the system occurs. The computer may be inactive, or it may exit in the midst of work, while closing all programs, from the browser to filezilla and the editor. How can be cured? Looked in auth.log:
Feb 22 14:23:50 U310 sudo: pam_unix(sudo:session): session opened for user root by (uid=0)
Feb 22 14:24:07 U310 sudo: pam_unix(sudo:session) : session closed for user root
Feb 22 14:31:42 U310 cinnamon-screensaver-dialog: gkr-pam: unlocked login keyring

Answer 1

Look at root's bash_history, since he's logged in to you.
dmesg and syslog output, what's there?