Unable to set scrolling speed of touchpad. (Ubuntu 22.10, wayland)

Question

I have an ASUS Zenbook OLED with a trackpad.

Even though this trackpad is fine, and mouse pointer movement is a good speed, the two-finger scroll is just too darn fast.

In the settings app, I can only set the pointer movement speed, not the scroll speed.

In the gnome-tweaks app, there is nothing to set the scroll speed either.

The only thing I could find is a hack that is far too drastic. (preloading a lib, and on-the-fly hacking the input events.)

A 'libinput measure' run was of no help.

I cannot find a libinput quirk attribute that would let me control scroll speed.

OS: Ubuntu 22.10

Desktop: Wayland

libinput: 1.21.0

laptop: ASUS ZenBook UX325EA

$ sudo libinput --list-devices
...
Device:           ASUE140A:00 04F3:3134 Touchpad
Kernel:           /dev/input/event6
Group:            6
Seat:             seat0, default
Size:             129x64mm
Capabilities:     pointer gesture
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: disabled
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    *button-areas clickfinger 
Disable-w-typing: enabled
Disable-w-trackpointing: enabled
Accel profiles:   flat *adaptive
Rotation:         n/a
...

Answer 1

I have an Ubuntu 22.04 and I got it to work in chrome. got to chrome://flags/ search Windows Scrolling Personality and enable it.

Answer 2

I've given up on getting this to work.

Note, although I am on Ubuntu 22.10, the same issue is present on older Ubuntu versions too.

I did find a workaround by doing the scrolling per app if the app has a setting for it.

For instance, Firefox:

Go to URL about:config

Accept the risk and continue.

Then search for mousewheel.default and set the multiplier values to something lower.

Answer 3

EDIT: I'm reading by now that synaptic might not be the best solution but libinput

you might disable wayland and use xinput instead by editing the /etc/gdm3/custom.conf file, you can do a sudo nano /etc/gdm3/custom.conf and uncomment the line that has WaylandEnable=false and then restart.

Once restarted you should be able to change xinput properties. List your devices withxinput list and change the property "Synaptics Scrolling Distance":

xinput --set-prop <id> 'Synaptics Scrolling Distance' -120 -120