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From: Richard Stallman <rms@gnu.org>
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Subject: Re: Poor handling of multiple X displays
Date: Fri, 19 Jul 2002 17:15:36 -0600 (MDT)
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In-Reply-To: <E17VZyy-000DKi-00@cyan.csi.cam.ac.uk> (message from Tony Finch
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    The underlying code that goes wrong is

    (make-frame '((display . "cyan.csi.cam.ac.uk:10.0")))

    which when run with C-x C-e produces

    Debugger entered--Lisp error: (error "Connection lost to X server `cyan.csi.cam.ac.uk:10.0'")
      x-create-frame(((visibility) (display . "cyan.csi.cam.ac.uk:10.0")))

This looks like a problem at the Xlib level.  If that is true,
there is nothing we can do.  We need someone to debug the problem.