GNU bug report logs - #54436
28.0.91; Only every second mouse wheel scroll is registered

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From: Urban Duh <urby.duh <at> gmail.com>
To: Po Lu <luangruo <at> yahoo.com>
Cc: Lars Ingebrigtsen <larsi <at> gnus.org>, 54436 <at> debbugs.gnu.org
Subject: bug#54436: 28.0.91; Only every second mouse wheel scroll is registered
Date: Tue, 22 Mar 2022 14:59:40 +0100

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This makes scrolling behave as it should on Wayland. On X however, Emacs
now receives too many scroll events per scroll on certain mouses. On
Logitech MX master 3, every mouse wheel scroll is registered as a double or
triple scroll. I would guess this has something to do with its scroll
wheel, since it has an electromagnetic scroll wheel. Such issues do not
exists on Emacs 28 though, but I guess I could probably make it usable by
binding triple scroll to normal scroll.

On Mon, 21 Mar 2022 at 12:05, Po Lu <luangruo <at> yahoo.com> wrote:

> Urban Duh <urby.duh <at> gmail.com> writes:
>
> >> On the other hand, I don't see why that would happen on Wayland.  Do you
> >> see a similar problem with a different mouse?  And can you verify that
> >> your build is actually running in Wayland and not Xwayland?
> >
> > I have the same issue with two different mouses (Logitech MX Master 3 and
> > a cheap off-brand mouse). My build is running Wayland (tested with xeyes
> > and by disabling Xwayland on gnome via gnome-shell --no-x11).
>
> What happens if you set mwheel-coalesce-scroll-events to nil?
>

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