Same problem on Gutsy to Hardy Heron upgrade.
Fixed by doing:
sudo /etc/init.d/acpid stop sudo dpkg --configure -a sudo /etc/init.d/acpid start
Same problem on Gutsy to Hardy Heron upgrade.
Fixed by doing:
sudo /etc/init.d/acpid stop
sudo dpkg --configure -a
sudo /etc/init.d/acpid start