Seems like a dbus problem when I grep out ERROR I get:
$this->bbcode_second_pass_code('', '
19:24:12.859 T:1917653568 ERROR: DBus: Error org.freedesktop.PolicyKit1.Error.Failed - Action org.freedesktop.login1.power-off-multiple-sessions is not registered
19:24:12.865 T:1917653568 ERROR: DBus: Error org.freedesktop.PolicyKit1.Error.Failed - Action org.freedesktop.login1.reboot-multiple-sessions is not registered
19:24:12.872 T:1917653568 ERROR: DBus: Error org.freedesktop.PolicyKit1.Error.Failed - Action org.freedesktop.login1.inhibit-delay-sleep is not registered
19:24:12.879 T:1917653568 ERROR: DBus: Error org.freedesktop.DBus.Error.InvalidArgs - No such property 'CanSuspend'
19:24:12.880 T:1917653568 ERROR: DBus: Error org.freedesktop.DBus.Error.InvalidArgs - No such property 'CanHibernate'
19:24:13.095 T:1917653568 DEBUG: UDisks: org.freedesktop.DBus.Error.ServiceUnknown - The name org.freedesktop.UDisks was not provided by any .service files
19:24:13.095 T:1917653568 DEBUG: DeviceKit.Disks: org.freedesktop.DBus.Error.ServiceUnknown - The name org.freedesktop.DeviceKit.Disks was not provided by any .service files
19:24:14.290 T:1917653568 ERROR: Unable to load libcec.so.4, reason: libcec.so.4: cannot open shared object file: No such file or directory
')
Link to
complete debug log.