[Bug 1922047] Re: Touchpad scrolling is too fast

Thu Dec 9 11:07:45 UTC 2021

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On 2020-01-21T12:11:07+00:00 Vincent-liao wrote:

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:72.0)
Gecko/20100101 Firefox/72.0

Steps to reproduce:

Open firefox wayland and start browsing on trackpad.

Actual results:

The scrolling is very unnatural and fast, it's uncomfortable to use.

Expected results:

The scrolling of wayland and x11 should be the same, but it's not.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/0

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On 2020-01-21T12:16:08+00:00 Vincent-liao wrote:

Created attachment 9122009
The video showing the normal scrolling behavior on firefox x11

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On 2020-01-21T12:17:18+00:00 Vincent-liao wrote:

Created attachment 9122010
The video showing the weird scrolling behavior on firefox wayland

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/2

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On 2020-01-21T12:17:27+00:00 Release-mgmt-account-bot wrote:

[Bugbug](https://github.com/mozilla/bugbug/) thinks this bug should
belong to this component, but please revert this change in case of
error.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/3

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On 2020-02-05T10:25:31+00:00 Daniel van Vugt wrote:

I can confirm this bug. `MOZ_ENABLE_WAYLAND` looks very promising but
the touchpad scrolling is too fast to be controllable.

Last time I spoke to the libinput maintainer about this subject (other
toolkits are guilty of the same bug) he said the ideal touchpad
scrolling speed is the unaccelerated speed of cursor movement. I would
tend to agree.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/4

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On 2020-05-31T00:55:34+00:00 2-me-b wrote:

I can also confirm this bug. On my trackpad, the scrolling speed on
wayland is almost uncontrollable. More precisely, the inertia is almost
zero. When I do a small "flick" on X11, it will scroll about 1/3 of the
screen then stop. On wayland, it will scroll probably 8 screens worth of
content (if the page is that long) before it comes to a stop.

I tested this on the latest nightly and there is no change.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/5

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On 2020-06-01T08:44:33+00:00 Oigevald+mozilla wrote:

Related https://gitlab.gnome.org/GNOME/gtk/-/issues/1308 "two-finger scrolling is far too fast".
This is a general problem with GNOME/GTK, though Firefox might exacerbate the issue.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/6

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On 2020-10-06T22:40:44+00:00 Cwestkaemper wrote:

I can confirm the bug is present on wayland, but not in xwayland or
native x11. Furthermore, my GTK apps do not appear to be exhibiting the
same issue, so I doubt that GTK is responsible, although I am not
knowledgeable enough to say for sure.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/7

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On 2021-02-09T23:17:07+00:00 Vincent Chernin wrote:

(In reply to Yariv from comment #6)
> Related https://gitlab.gnome.org/GNOME/gtk/-/issues/1308 "two-finger scrolling is far too fast".
> This is a general problem with GNOME/GTK, though Firefox might exacerbate the issue.

It appears that the above upstream linked bug has been closed due to the
confusing array of comments. There appears to be another issue opened
for it though: https://gitlab.gnome.org/GNOME/gtk/-/issues/3631

I agree that firefox seems to somehow exacerbate the gtk issue, perhaps
since one often wants to scroll to a very specific part of the page.
Also, the scrolling behaviour can be very easily compared to other
operating systems by opening the same webpages.

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On 2021-02-10T01:41:12+00:00 Daniel van Vugt wrote:

I would be surprised if this was related to the GTK issue because GTK
was never as dramatically fast as `MOZ_ENABLE_WAYLAND` seems to be.
Maybe Firefox exacerbates the issue as you say, but either way it feels
like Firefox needs its own unique fix. Please don't just wait for a GTK
fix and expect that to also fix Firefox.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/9

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On 2021-03-19T10:03:49+00:00 Till Schäfer wrote:

I can confirm this for Firefox 86.0.1

Operating System: Gentoo Linux
KDE Plasma Version: 5.21.3
KDE Frameworks Version: 5.80.0
Qt Version: 5.15.2
Kernel Version: 5.11.7-gentoo
OS Type: 64-bit
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-4810MQ CPU @ 2.80GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 4600

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On 2021-04-06T03:44:51+00:00 Mert Can Demir wrote:

In Windows 10, with the Precision touchpad, unaccelerated scrolling
deltas are used directly. In Firefox and GTK, they are not used
directly, it seems. Also, the scrolling on X11 using XInput2 with
touchpad is also unusable for me, same with GTK. Haven't exactly tested
Wayland though, but for me, it is 1.5xish compared to X11.

I could manage the situation for Firefox as changing
`mousewheel.default.delta_multiplier_x` and
`mousewheel.default.delta_multiplier_x` from 100 to 30, and
`mousewheel.min_line_scroll_amount` from 5 to 180. With deltas, I could
manage touchpad scrolling speed usable, and with
`min_line_scroll_amount` one, mouse doesn't be affected by the delta
reduction command. These are my findings.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/16

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On 2021-04-21T21:09:11+00:00 Botond-2 wrote:

*** Bug 1674218 has been marked as a duplicate of this bug. ***

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/17

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On 2021-05-26T14:58:59+00:00 Strangiato Xanadu wrote:

Firefox 89 beta running on Wayland session of KDE Plasma is affected.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/18

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On 2021-12-09T06:31:19+00:00 Hunter Nightblood wrote:

Firefox 95.0 on Fedora 35 KDE Wayland Session is also affected. It kind
of feels like using touch screen scrolling without the touch screen.

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https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1922047/comments/19

** Changed in: firefox
       Status: Unknown => New

** Changed in: firefox
   Importance: Unknown => Medium

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  Touchpad scrolling is too fast

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