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

[Stephen Berman <stephen.berman@gmx.net>]

On Tue, 30 Aug 2022 20:48:23 +0800 Po Lu <luangruo@yahoo.com> wrote:

> Stephen Berman <stephen.berman@gmx.net> writes:
>
>> This failed to build; I assume you meant leave->detail, which did build.
>
> Yes, that's what I meant, sorry.
>
>> The shell output looks like this:
>>
>> Enter 0 3
>> Leave 1 0
>> Enter 2 0
>> Leave 1 0
>> Enter 2 0
>> Leave 1 0
>> Enter 2 0
>> Leave 1 0
>> ... (and so on)
>
> [...]
>
>> After applying the patch and rebuilding, scrolling the mouse wheel is
>> still a no-op.
>
> What window manager are you using?
> Is it xfwm4 by any chance?

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?

Steve Berman