Comment 21 for bug 916200

This is just an information for those that come to here due to matching search engine keywords, it is only partially related to this bug, so all others please ignore this.

If your system does not power off at all (including hang at reboot) you may have fallen into this trap:
- install ipmitool
- recognise that your system does not meet the requirements for ipmi_si (matching errors as described above)
- remove ipmitool

Now ipmi_si is still present in the system and you can see the correspondig startup messages in system.log and it seems to be able to prevent poweroff.

Solution: PURGE ipmitool (and maybe openipmi as well - at least there was "remaining configuration" present in my system for this package as well and therefore I purged it additionally).

After that, my system was able to reboot again and was able to completely poweroff on its own:
CPU: Clarkdale i3 540
Board: ASUS P7H55D-M Evo
OS: Mythbuntu 12.04.4