Sometimes mate-power-manager doesn't start on boot up

[ddurdle]

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.
Traceback:
mate-power-manager() [0x41a347]
mate-power-manager() [0x408a9e]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f1cd577aead]
mate-power-manager() [0x408ac9]

If I try it a second time, it works. Perhaps it is failing with similar error on bootup?