georg@georg-esprimo:~/Desktop/linux-cnc-dev$ which linuxcnc
/usr/bin/linuxcnc
georg@georg-esprimo:~/Desktop/linux-cnc-dev$ linuxcnc BF20-2015-06-21-dev.ini 
LINUXCNC - 2.6.8
Machine configuration directory is '/home/georg/Desktop/linux-cnc-dev'
Machine configuration file is 'BF20-2015-06-21-dev.ini'
Starting LinuxCNC...
.
Xlib.protocol.request.QueryExtension
Xlib.protocol.request.QueryExtension

/usr/bin/gladevcp:292: GtkWarning: GdkWindow 0x3e00003 unexpectedly destroyed
  gtk.main()
**** GLADE VCP ERROR:    X Protocol Error: 3
Shutting down and cleaning up LinuxCNC...
georg@georg-esprimo:~/Desktop/linux-cnc-dev$