jcb@localhost:~$ journalctl -o verbose -n
 -- Logs begin at Sa 2015-01-10 20:03:48 CET, end at Mi 2015-11-25 13:32:42 CET.
 Mi 2015-11-25 13:32:39.518585 CET s=47da77439d10498aafb608231cd005cd;i=190441;
     _TRANSPORT=stdout
     PRIORITY=6
     SYSLOG_IDENTIFIER=gnome-session
     _UID=1000
     _GID=1000
     _COMM=gnome-session
     _EXE=/usr/bin/gnome-session
     _CMDLINE=gnome-session
     _CAP_EFFECTIVE=0
     _AUDIT_SESSION=1
     _AUDIT_LOGINUID=1000
     _SYSTEMD_CGROUP=/user.slice/user-1000.slice/session-1.scope
     _SYSTEMD_SESSION=1
     _SYSTEMD_OWNER_UID=1000
     _SYSTEMD_UNIT=session-1.scope
     _SYSTEMD_SLICE=user-1000.slice
     _MACHINE_ID=956fbf7078cb4692bed922be877f6778
     _HOSTNAME=localhost.localdomain
     _BOOT_ID=a552964bee8a4416b0e1134f2f197e64
     _PID=2409
     MESSAGE=(gnome-shell:2525): mutter-WARNING **: STACK_OP_LOWER_BELOW: window