x-tream@Staatsrechner:~/$ winecfg
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

err:imagelist:ImageList_ReplaceIcon no color!
err:imagelist:ImageList_ReplaceIcon no color!
err:imagelist:ImageList_ReplaceIcon no color!
err:imagelist:ImageList_ReplaceIcon no color!
ALSA lib seq_hw.c:457:(snd_seq_hw_open) open /dev/snd/seq failed: No such file or directory
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

Application tried to create a window, but no driver could be loaded.
Make sure that your X server is running and that $DISPLAY is set correctly.
(x-tream@Staatsrechner:~/$ $DISPLAY)
(bash: :0.0: command not found)
(x-tream@Staatsrechner:~/$ sudo gedit /usr/bin/xgame)
x-tream@Staatsrechner:~/$ synaptic
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified


(synaptic:6065): Gtk-WARNING **: cannot open display:  
x-tream@Staatsrechner:~/$