Archlinux: Error dbus

Error:
$ /etc/rc.d/dbus start
:: Starting D-BUS system messagebus [BUSY] Failed to start message bus: Could not get UID and GID for username "dbus"
[FAIL]


Solució
bash-3.2# groupadd -g 81 dbus
bash-3.2# useradd -c 'System message bus' -u 81 -g dbus -d '/' -s /bin/false dbus

per arrancar-ho automàticament:
nano /etc/rc.conf
DAEMONS=(... hal dbusd ...)