bug#229: 23.0.60; Weird X11 input-related hang

[George White]

On Tue, 13 May 2008, Chong Yidong wrote:

> corbet@lwn.net wrote:
>
> > For quite some time I have seen a strange bug where emacs (running
> > under X11) would occasionally stop responding to keyboard and mouse
> > events.  The editor is still alive, and will change the cursor block
> > in response to focus events, but mouse clicks and keystrokes have no
> > effect.  The only way I've found to recover is to kill the emacs
> > process and start over.
> >
> > Today I figured out how to reproduce it: move the pointer to the
> > menubar at the top of the window, then move the scroll wheel for a
> > click or two.  Works every time.  Does not appear to be dependent on
> > major mode.
> >
> > This happens with stock emacs as shipped by Fedora and my own pretest
> > builds too.
> >
> > In GNU Emacs 23.0.60.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.12.0)
> > of 2007-12-15 on vena
>
> I can't reproduce this on 23.0.60.50 (i686-pc-linux-gnu, GTK+ Version
> 2.12.9).
>
> Can anyone on the list reproduce this problem?

Yes and no.  Emacs appears "hung", but clicking on a menu releases it.
I assume that moving the scroll wheel "activate" the menus, and Emacs
is just waiting for further instructions.  Changing focus to another
window seems to work as well.  I'm using:

23.0.60.1 (i686-redhat-linux-gnu, GTK+ Version 2.12.8)

--
George White <aa056@chebucto.ns.ca> <gnw3@acm.org>
189 Parklea Dr., Head of St. Margarets Bay, Nova Scotia  B3Z 2G6