I've tried tightvncserver and vnc4server on Ubuntu. I've tried tightvnc viewer and ultravnc viewer on Windows XP. I can connect from Windows to Ubuntu with any combination, but there is no screen refresh: I can drag a window on Ubuntu using my mouse in Windows or type into a terminal in Ubuntu from my keyboard in Windows, but the image does not change on Windows. I can request a screen refresh from Windows but the screen does not update.

I am running the ATI driver on Ubuntu. I've tried stepping the System|Preferences|Appearance|Visual Effects down from Extra to Normal with no effect.

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up vote 1 down vote accepted

Moved System|Preferences|Appearance|Visual Effects from Normal all the way down to None. VNC works.

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As an alternative to completely disabling desktop effects, you may also try (on the remote host you are attempting to view via vnc) running "gconf-editor", and go to /desktop/gnome/remote_access and enable "disable_xdamage"

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