bug#57476: 29.0.50; Mouse wheel event ignored on Lucid build

[Po Lu]

Stephen Berman <stephen.berman@gmx.net> writes:

> Yes:
>
> $ xfwm4 --version
>       This is xfwm4 version 4.16.1 (revision 5f61a84ad) for Xfce 4.16
>       Released under the terms of the GNU General Public License.
>       Compiled against GTK+-3.24.31, using GTK+-3.24.33.
>
>       Build configuration and supported features:
>       - Startup notification support:                 Yes
>       - XSync support:                                Yes
>       - Render support:                               Yes
>       - Xrandr support:                               Yes
>       - Xpresent support:                             No
>       - X Input 2 support:                            No
>       - Embedded compositor:                          Yes
>       - Epoxy support:                                Yes
>       - KDE systray proxy (deprecated):               No
>
> Perhaps the missing XInput2 support is causing the problem?

Please try enabling that, but we should work around the bug in xfwm
builds without XInput 2 anyway.

In fact, this bug was fixed several months ago, but the fix disappeared
sometime during the following cleanups to the scroll valuator management
code.