Comment # 3 on bug 968727 from Franck Bui

(In reply to patrick shanahan from comment #2)
> 
> plug drive in graphical target and tell device notifier to mount
> 
> have not tried using manual mount

Which desktop environment are you using (KDE, LXDC, ...) ?

Are you sure the mounts get dropped when switching from runlevel 3 to 5 ?