Re: Duplication error upon startx with XWin :0; No terminal withXWin :1

[Igor Pechtchanski <pechtcha at cs dot nyu dot edu>]

On Fri, 8 Jul 2005, Angus Veitch wrote:

> First of all, thanks to Alexander and Igor for responding to my last
> message. I'm edging my way forward, but haven't seen the light just yet.
> I'm still not having much success running startx or xdmcp.  It's even
> possible that some of what I am observing is perfectly healthy, and it
> is my expectations or understanding of the program that are wrong.
> Since I don't know whether all my problems are related, I'll deal with
> startxwin.bat in this email and with startxdmcp.bat in the next one.
> Sorry for all the logs!
>
> I'm running a freshly downloaded cygwin/x, and am trying to connect WinXP to a
> (nearly) freshly installed Linux box running MEPIS.
>
> If I run startxwin.bat with the line "XWin :0 -multiwindow -clipboard
> -silent-dup-error", I successfully load a terminal, but attempting to run
> startx invokes: "Fatal server error: InitOutput - Duplicate invocation on
> display number: 0."  The full XWin.log follows:
> [snip]

If it really is a duplicate invocation on the same window station, you
should have an "X" icon in your system tray.  You could quit the current X
server, and your new one would come up.

> I can't find any other xwin processes running (perhaps I don't know what to
> look for),

ps -W | grep -i xwin

> but to keep xwin happy, I instead run startxwin.bat with "XWin :1
> (...etc)".  The result is that I get no terminal at all  -- the cygwin/x
> window is just a blank grey screen.  The XWin.log follows:
>
> ---------------------------------------------------------
> Welcome to the XWin X Server
> Vendor: The Cygwin/X Project
> Release: 6.8.2.0-3
>
> Contact: cygwin-xfree@cygwin.com
>
> XWin was started with the following command line:
>
> /usr/X11R6/bin/XWin :1 -multiwindow -clipboard -silent-dup-error
> [snip]
> winDeinitMultiWindowWM - Noting shutdown in progress
> winClipboardProc - winClipboardFlushWindowsMessageQueue trapped WM_QUIT
> message, exiting main loop.
> winClipboardProc - XDestroyWindow succeeded.
>
> winClipboardIOErrorHandler!
>
> winDeinitMultiWindowWM - Noting shutdown in progress
> ---------------------------------------------------------
>
> So, my question is: Why is the terminal missing when I run startwinx.bat
> with display number :1 rather than :0?

You're basically attempting to start two multiwindow window managers on
the same underlying Windows desktop.  If I understand this correctly, the
multiwindow manager needs some sort of exclusive access to the underlying
Windows interface to delegate all of the window handling, and having more
than one of them makes them interfere with each other.

Try starting the second XWin without the -multiwindow parameter, and see
if it helps.  You don't want -multiwindow for XDMCP anyway.
	Igor
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