You can possibly get a bit more information by invoking vncviewer from xterm instead of launching it from the GUI. In order to do this, you'll need xterm. After starting xterm, invoke vncviewer with the following: run-standalone.sh /var/lib/install/usr/bin/vncviewer . Then, do what you would normally do in the VNC Viewer GUI. When VNC viewer crashes, go back to xterm and see if there is any useful output. Aaron