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

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 [email protected]
>>>> 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