A rule in /etc/dbus-1/system.d/hal.conf defines what group of users is
allowed to do power management. In Trisquel 5.5 Brigantia, this group is
named "powerdev":
Check whether the group is still named "powerdev" and see if you are in this
group by executing:
$ groups
If not, it is only about adding your user name ("crismblog" in the command
below) at the end of the line of /etc/group that starts with "powerdev" (or
the other group name if it changed between Trisquel 5.5 and 6.0). To do so,
you need administrator privileges:
$ sudo sed -i '/^powerdev:/ s/$/,crismblog/' /etc/group
You could also do that with a text editor but a command is much "kooler". :-)
