If you start sunvts or vtsk from a screen other than the console monitor, frame buffer locking is not available. In this case:
disable the window locking option on the remote screen to d.
enable frame buffer locking for the console monitor, as shown in the example above. The SunVTS user interface cannot display on a monitor if locking is disabled.
Do not run any graphic programs (including vtsui) on the remote frame buffer during graphic testing.