Comment 18 for bug 89269

As a workaround for that bug I have done this:

1. open up a terminal window
2. cd /usr/lib/pm-utils/sleep.d
3. sudo gedit 99-power-state-fix.sh
4. paste this:

#!/bin/bash
/usr/bin/on_ac_power
if [ "$?" -eq 0 ]; then
 echo "BATTERY" > /var/lib/acpi-support/powerstate
 /etc/acpi/power.sh ac_adapter
else
 if [ "$?" -eq 1 ]; then
  echo "AC" > /var/lib/acpi-support/powerstate
  /etc/acpi/power.sh battery
 fi
fi

5. save & close
6. chmod 755 99-power-state-fix.sh

What this does is trick the power.sh file into thinking the power state has changed and forces it to recheck everything and run what's needed for this 'new' power state. It's just an ugly fix for a bigger problem and I'd rather have this fixed.