Xlib itself just passes the XQueryPointer request along to the
server. The server rejected the window ID. Usually (always in
the cases I've seen) this is because the window doesn't exist.
But I suppose it could do it if it thought the client didn't
have security clearance to read the contents of that window.
That sort of functionality is built into the window ID -> Window
structure lookup routine. Assuming it's not a Mathematica bug
(assumed because you didn't see this with 4.3), I would guess
it's an authentication problem of some sort. Unfortunately,
I myself know very little about this. Does starting the
server with the -ac flag ("startx -- -ac") help the situation?
Mark.
On Mon, 15 Mar 2004, Peter Breitenlohner wrote:
> On Fri, 12 Mar 2004, Mark Vojkovich wrote:
>
> > Do you have X-servers running on both machines? What happens
> > if you only have an X-server running on the one machine (ie. not
> > on the machine Mathematica is running on).
>
> Normally yes. If I stop xdm and the X-server on the remote machine there is
> absolutely no change in the behaviour.
>
> > On Fri, 12 Mar 2004, Peter Breitenlohner wrote:
> >
> > > 1. We have a problem in the interaction between
> > > XFree86-4.4.0 <=> ssh (openssh-3.7.1p2 or 3.8p1) <=>
> > > mathematica (5.0 or 4.2)
> > >
> > > Assume I am logged into an X-session on "hosta" and then log into "hostb" via
> > > ssh with X-forwarding. If I then start mathematica (the graphical frontend)
> > > I get zillions of messages on stderr:
> > > ......
> > > until I exit from mathematica. (If I don't do that fast enough the
> > > mathematica window occasionally freezes.)
>
> Peter Breitenlohner <peb@xxxxxxxxxxxx>
>
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