Re: FVWM: restarting fvwm

From: Dominik Vogt <fvwm_at_fvwm.org>
Date: Mon, 21 May 2001 13:16:15 +0200

On Fri, May 18, 2001 at 01:27:31PM -0700, Perry Hutchison wrote:
> > > when I press the pulldown menu of netscape the menu shows up as
> > > expected, but once in a month netscape refuses to continue, it simply
> > > stalls. When showing up the pulldown menu the mouse pointer changes its
> > > shape, e.g. from an "X" to an arrow pointing north-east. A further
> > > consequence of this is I can't focus any other windows anymore. Netscape
> > > (or netscape's pull down menu) doesn't release the focus.
> > >
> > > So I switch back to a virtual console via CTRL-ALT-F1 and kill netscape
> > > with "pkill -9 netscape". switiching back to X reveals that netscape is
> > > really dead but unfortunately the mouse is still an arrow pointing
> > > north-east and thus I can't focus any other windows leaving X-windows in
> > > an unusable state. now i have to kill x-windows from a virtual console
> > > and start it, again ;-(
> >
> > Yes, I saw this Netscape's bug too. It leaves cursor grabbed.
>
> I've seen this also, although with a different app (not Netscape).
>
> Granted a well-behaved app shouldn't lock up to the point of needing
> kill -9 at any point, much less with the cursor grabbed; nevertheless
> it seems like a bug somewhere (X server? Window Manager?) to allow
> the cursor to remain grabbed after the window that grabbed it has
> been destroyed.

If it's really netscape that has grabbed the cursor, X must
release the grab after netscape is killed. So its either an X11
bug or a different application has grabbed the cursor (the window
manager?). Since the cursor has still the shape of the netscape
menu cursor it awfully looks like a bug in X11. There is a simple
way to find out where the bug is: kill all X applications one by
one from the console and see if the cursor is ungrabbed after
killing one of them. If the cursor is still forzen after all X
applications have been killed, it must be an X bug.

Restarting fvwm2 will only help if fvwm grabbed the cursor.

> Is there any prospect of fixing it, or does this
> turn out to be one of those fundamental X problems that's not easily
> fixed?

That's hard to say without actually knowing where the problem
comes from. I experience spurious lockups with XFree 3.3.x and
4.x especially when switching X servers or between X server and
console, so it may well be a problem of the X server.

Bye

Dominik ^_^ ^_^

--
Dominik Vogt, email: d.vogt_at_lifebits.de
LifeBits Aktiengesellschaft, Albrechtstr. 9, D-72072 Tuebingen
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Received on Mon May 21 2001 - 06:16:42 BST

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