Am Sonntag, 20. Februar 2011 schrieb Paul Cartwright: > On 02/20/2011 01:58 PM, Mag. Dr. Nikolaus Klepp wrote: > > oh, i overlooked that tart with ":1.0". try this: > > > > $ xhost + > > $ su > > # DISPLAY=:0 synaptic > > # DISPLAY=:0 synaptic > Invalid MIT-MAGIC-COOKIE-1 key > (synaptic:10481): Gtk-WARNING **: cannot open display: :0 > > maybe I should reinstall synaptic.. no, that's not the thing. your X is not running as display 0 nor 1. could you make $ ls /var/log/Xorg.* This should give some files Xorg.<a number>.log, where <a number> is the display id. that's the thing you pass to synaptic: # DISPLAY=:<a number> synaptic