Comment 16 for bug 1010608

Thanks to #4. And I'd like to share my work around on Fedora 17.

Modify /etc/acpi/actions/power.sh

Add one line of $2 ~ /mate-power-manager/ ||
And it becomes like:

# Check that there is a power manager, otherwise shut down.
[ "$uid_session" ] &&
ps axo uid,cmd | \
awk '
    $1 == '$uid_session' &&
        ($2 ~ /gnome-power-manager/ || $2 ~ /kpowersave/ ||
         $2 ~ /xfce4-power-manager/ || $2 ~ /\/usr\/libexec\/gnome-settings-daemon/ ||
         $2 ~ /mate-power-manager/ ||
         $2 ~ /kded4/ || $3 ~ /guidance-power-manager/) \
                { found = 1; exit }
    END { exit !found }
' ||
  shutdown -h now