The first thing I noticed that I can't see my remote destop icons. When Itried to logout, there is a warning saying there is some process running and asks if I want to logout. I do not run any process so I chose to log out. Checking /var/log/syslog shows following suspicious lines:
Activated service 'org.freedesktop.login1' failed: Cannot launch daemon, file not found or permissions invalid
Nov 29 12:54:08 xgserver mate-session[5636]: WARNING: Client '/org/mate/SessionManager/Client4' failed to reply before timeout
Nov 29 12:55:15 xgserver /usr/sbin/x2gocleansessions[1889]: xuser-50-1417261525_stDMATE_dp24, pid 5274 cleaning up stale X11 socket file: /tmp/.X11-unix/X50
Nov 29 12:55:15 xgserver /usr/sbin/x2gocleansessions[1889]: xuser-50-1417261525_stDMATE_dp24, pid 5274 cleaning up stale X11 lock file: /tmp/.X50-lock
Nov 29 12:55:15 xgserver /usr/bin/x2goumount-session[8783]: ERROR: failed to unmount "/tmp/.x2go-xuser/spool/C-xuser-50-1417261525_stDMATE_dp24"
Nov 29 12:55:15 xgserver /usr/bin/x2goumount-session[8792]: ERROR: failed to unmount "/tmp/.x2go-xuser/spool/C-xuser-50-1417261525_stDMATE_dp24"
Nov 29 12:55:16 xgserver console-kit-daemon[4582]: GLib-CRITICAL: Source ID 59 was not found when attempting to remove it
Nov 29 12:55:17 xgserver console-kit-daemon[4582]: GLib-CRITICAL: Source ID 28 was not found when attempting to remove it
Nov 29 12:55:17 xgserver /usr/bin/x2gomountdirs[5335]: WARNING: mounting of /home/im/.x2go/S-xuser-50-1417261525_stDMATE_dp24/spool failed
Nov 29 12:55:17 xgserver console-kit-daemon[4582]: GLib-CRITICAL: Source ID 28 was not found when attempting to remove it
Nov 29 12:55:18 xgserver console-kit-daemon[4582]: GLib-CRITICAL: Source ID 78 was not found when attempting to remove it
Nov 29 13:03:04 xgserver /usr/bin/x2gostartagent: successfully started X2Go agent session with ID xuser-50-1417262583_stDLXDE_dp24
Nov 29 13:03:05 xgserver /usr/bin/x2goruncommand: launching session with Xsession-x2go mechanism, using STARTUP="startlxde"
Nov 29 13:03:06 xgserver /usr/bin/x2gosetkeyboard: Setting X keyboard according to /home/xuser/.x2go/C-xuser-50-1417262583_stDLXDE_dp24/keyboard
Nov 29 13:05:19 xgserver /usr/bin/x2goumount-session[16790]: ERROR: failed to unmount "/tmp/.x2go-xuser/spool/C-xuser-50-1417262583_stDLXDE_dp24"
Nov 29 13:05:20 xgserver console-kit-daemon[4582]: GLib-CRITICAL: Source ID 133 was not found when attempting to remove it
Nov 29 13:05:20 xgserver console-kit-daemon[4582]: GLib-CRITICAL: Source ID 109 was not found when attempting to remove it
Nov 29 13:05:20 xgserver /usr/bin/x2gomountdirs[15088]: WARNING: mounting of /home/im/.x2go/S-xuser-50-1417262583_stDLXDE_dp24/spool failed
Nov 29 13:05:32 xgserver /usr/bin/x2gostartagent: successfully started X2Go agent session with ID xuser-50-1417262730_stDLXDE_dp24
Nov 29 13:05:33 xgserver /usr/bin/x2goruncommand: launching session with Xsession-x2go mechanism, using STARTUP="startlxde"
Nov 29 13:05:35 xgserver /usr/bin/x2gosetkeyboard: Setting X keyboard according to /home/xuser/.x2go/C-xuser-50-1417262730_stDLXDE_dp24/keyboard