using ubuntu-10.10-desktop-amd64 fully updated, Linux myhost 2.6.35-28-generic #50-Ubuntu SMP Fri Mar 18 18:42:20 UTC 2011 x86_64 GNU/Linux via@myhost:~$ dispcal -D5 -? Calibrate a Display, Version 1.3.0 Author: Graeme W. Gill, licensed under the GPL Version 3 Diagnostic: Usage requested usage: dispcal [options] outfile -v [n] Verbose mode -display displayname Choose X11 display name -d n[,m] Choose the display n from the following list (default 1) Optionally choose different display m for VideoLUT access Checking XRandR 1.2 VideoLUT access XRandR 1.2 is faulty - falling back to older extensions get_displays checking for Xinerama Display 0 name = ':0.0' 1 = 'Screen 1 at 0, 0, width 1920, height 1080' -c listno Set communication port from the following list (default 1) >> hangs here I removed all usb devices (mouse, keyboard, printer) and rebooted. dispcal -D5 -? hangs same place sudo dispcal -D5 -? hangs same place What else can I do?