Your link seems to be broken (404). (Update: it works now.)

However, from what you're saying, that sounds like vnc. I have vncserver already installed and working on my machine, and it's also easy to start another real X server on a different console if I want to do a test like this. Does Xvfb have any advantage over these?

In reply to Re^2: To install Tk, you need an X display by ambrus
in thread To install Tk, you need an X display by ambrus

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