Errors occurred in previous boot:
erlangen:~ # journalctl -b -1 -u init.scope -g polkit
Dec 17 06:08:10 erlangen systemd[1]: Created slice Slice /system/polkit-agent-helper.
Dec 17 06:08:31 erlangen systemd[1]: polkit-agent-helper@0-21775-1001.service: Main process exited, code=exited, status=1/FAILURE
Dec 17 06:08:31 erlangen systemd[1]: polkit-agent-helper@0-21775-1001.service: Failed with result 'exit-code'.
Dec 17 06:08:31 erlangen systemd[1]: polkit-agent-helper@0-21775-1001.service: Triggering OnFailure= dependencies.
Dec 17 06:08:31 erlangen systemd[1]: failure-notification@polkit-agent-helper@0-21775-1001.service: Deactivated successfully.
Dec 17 06:08:38 erlangen systemd[1]: polkit-agent-helper@1-91347-1000.service: Main process exited, code=exited, status=1/FAILURE
Dec 17 06:08:38 erlangen systemd[1]: polkit-agent-helper@1-91347-1000.service: Failed with result 'exit-code'.
Dec 17 06:08:38 erlangen systemd[1]: polkit-agent-helper@1-91347-1000.service: Triggering OnFailure= dependencies.
Dec 17 06:08:38 erlangen systemd[1]: failure-notification@polkit-agent-helper@1-91347-1000.service: Deactivated successfully.
Dec 19 20:20:12 erlangen systemd[1]: Removed slice Slice /system/polkit-agent-helper.
Dec 19 20:20:12 erlangen systemd[1]: polkit.service: Deactivated successfully.
Dec 19 20:20:12 erlangen systemd[1]: polkit.service: Consumed 4.241s CPU time.
Dec 19 20:20:14 erlangen systemd[1]: polkit-agent-helper.socket: Deactivated successfully.
erlangen:~ #
Graphical sessions started at tty3 and tty5 failed. New sessions were started at tty7 and tty9.
After reboot sessions again start at tty3 and tty5. No errors occur in current boot:
erlangen:~ # journalctl -b -u init.scope -g polkit
-- No entries --
erlangen:~ #