Comment 13 for bug 10548

For the records, I debugged this problem on your machine. The problem is that
the hal user is not in group 'cdrom'. Put hal into floppy, cdrom, and plugdev
(with the commands I wrote in private mail) and everything will work again. Any
idea how the auxilliary groups disappeared? Did you run adduser manually? Did
you recently used gnome-system-tools? There is currently a nasty bug which
removes random users from random groups.