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I would like to ask the following question. I installed Ubuntu 17.10.1 on my Thinkpad X1C 5th gen. Trackpoint worked after putting the kernel option "psmouse.proto=bare". But, I can not change the scrolling direction. Now, pushing the trackpoint up (toward the display) scrolls a window down and pushing the trackpoint down (toward the trackpad) scrollls a window up. How can I reverse this scrolling?

I created the file /usr/share/X11/xorg.conf.d/90-evdev.conf with the following content:

Section "InputClass"
Identifier "Touchpad/TrackPoint"
MatchProduct "PS/2 Generic Mouse"
MatchDriver "evdev"
Option "EmulateWheel" "1"
Option "EmulateWheelButton" "2"
Option "Emulate3Buttons" "0"
Option "XAxisMapping" "7 6"
Option "YAcisMapping" "5 4"
EndSection

Then, I changed the XAxisMapping into "6 7". But, even after logout/login, nothing has changed on the scrolling. What should I do instead? Thank you in advance.

veo
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1 Answers1

4

I solved this problem on my Thinkpad T420s running Arch, but it should work on Ubuntu just the same.

Step 1

Get the name of the Trackpoint:

$ xinput list

The name of the Trackpoint is referred to as <device>, if it contains spaces, the name must be put into quotes. On my T420s the Trackpoint is called "TPP/2 IBM TrackPoint".

Step 2

Get the name of the option for natural scrolling:

$ xinput list-props <device>

The name of the option is referred to as <option>, again it must be put into quotes, if it contains spaces. For my Trackpoint the option is called "libinput Natural Scrolling Enabled".

Step 3

Set the option to the desired setting:

$ xinput set-prop <device> <option> <setting>

For natural scrolling, the <setting> is 1, so the entire command is:

$ xinput set-prop "TPPS/2 IBM TrackPoint" "libinput Natural Scrolling Enabled" 1

Step 4

Make the setting permanent with the .xprofile file:

$ echo 'xinput set-prop <device> <option> <setting>' >> ~/.xprofile

The .xprofile file is sourced on startup of Xorg. That means, the command is executed every time the PC starts the display server for graphics. If you don't use a display manager put it in .xinitrc.

David Härer
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