[arch-general] systemd and local group membership

[F.Gr.]

Excerpt from Giorgio Lando's message
of 2012-10-28T12:29+0100:

> > "Note: Adding your user to groups (optical, audio, scanner, ...)
> > is not necessary with systemd. It might even break the wanted
> > functionality if you do so."
> 
> While I ignore the technical reasons, my scanner does not work if I
> am not in the scanner group.

Indeed, if I'm not in the optical group, K3b doesn't work. (I'm
running Xfce, not KDE; I don't know if it is related).