bug#5177: 23.1.90; scrollbar thumb stops working after being dragged

[Ken Brown]

On 12/10/2009 6:11 PM, Angelo Graziosi wrote:
> Il 10/12/2009 20.43, Ken Brown ha scritto:
> > On 12/10/2009 2:31 PM, Jan Djärv wrote:
> > > Ken Brown skrev:
> > > > Please write in English if possible, because the Emacs maintainers
> > > > usually do not have translators to read other languages for them.
> > > >
> > > > Your bug report will be posted to the emacs-pretest-bug@gnu.org
> > > > mailing list.
> > > >
> > > > Please describe exactly what actions triggered the bug
> > > > and the precise symptoms of the bug. If you can, give
> > > > a recipe starting from `emacs -Q':
> > > >
> > > > 1. Start the Gtk+ build of emacs.
> > > > 2. Visit a file too big to fit in the window.
> > > > 3. Drag the (vertical) scrollbar thumb.
> > > > 4. Scroll through the buffer using the mouse wheel or keystrokes.
> > > >
> > > > The scrollbar thumb stays fixed and no longer shows the relative
> > > > position in the buffer. Clicking in an empty area of the scrollbar
> > > > restores the correct behavior.
> > >
> > > This does not happen for me. Must be Cygwin-specific.
> >
> > Angelo Graziosi told me he has observed similar behavior in Kubuntu.
> > Could it be related to the Gtk+ version? My Cygwin build uses version
> > 2.18.3.
>
> I can reproduce the bad behavior on Kubuntu 8.04 and 9.10 on which I 
> have the builds I did on 20091207.

It would be helpful if a few people who have built emacs on other 
systems could see if they can reproduce this bug.  And if you could 
report which version of Gtk+ you have, that might help narrow the 
problem down.

Thanks.

Ken