I've noticed that 3/5 reboots after upgrading to UP5, that mate-power-manager isn't starting up at login into MATE. The battery icon doesn't appear in the notification bar. I have to manually start it by running "mate-power-manager &".
It appears it may be randomly erroring out. Sometimes when I try to start it, I get the following error:
TI:18:42:50 TH:0x1986cd0 FI:gpm-main.c FN:main,230
- This program cannot start until you start the dbus session service.
This is usually started automatically in X or mate startup when you start a new session.
If I try it a second time, it works. Perhaps it is failing with similar error on bootup?