1792211 - Respect libinput Natual Scrolling feature

Status: RESOLVED INVALID

(Core :: Panning and Zooming, defect)

Description

[jimbo]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:105.0) Gecko/20100101 Firefox/105.0

Steps to reproduce:

1. Upgraded from Ubuntu 20 to 22.
2. Firefox automatically migrated from apt package to snap package.
3. Open Firefox, navigate to a page with more content than can fit on screen.
4. Attempt to use two-finger drag on the touchpad to scroll vertically.

Actual results:

Scroll direction is inverted (scrolls frame, not content).

Expected results:

Scroll direction should match finger swipe direction. This is called Natural Scrolling in the Ubuntu Mouse & Touchpad settings.

Comment 1

[jimbo]

Workaround:

1. Open about:config.
2. Search for preference mousewheel.default.delta_multiplier_y
3. Edit value, change from 100 to -100.
4. Restart Firefox.

Natural Scrolling should now work.

Comment 2

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Core::Panning and Zooming' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Botond Ballo [:botond]]

Is this Natural Scrolling a new feature in Ubuntu 22, or did it work in Ubuntu 20 and was broken by the upgrade?

Comment 4

[Hiroyuki Ikezoe (:hiro)]

It looks like it's a feature provided by libinput. From libinput man page;

  libinput Natural Scrolling Enabled
         1 boolean value (8 bit, 0 or 1). 1 enables natural scrolling

Comment 5

[jimbo]

Update: is a Firefox bug. The problem was a conflict between xserver-xorg-input-libinput and xserver-xorg-input-synaptics. After upgrading from Ubuntu 20 to 22, both packages were installed. Removing the later and rebooting fixed the issue. Workaround no longer required.

See: https://askubuntu.com/questions/907279/enable-natural-scrolling-on-ubuntu-17-04-with-gnome-shell/907847#907847

Comment 6

[jimbo]

*is NOT a Firefox bug