ThinkPad T440s brings a new big clickable touchpad that also contains tree buttons you use when manipulate with trackpoint. This post shows how to enable scrolling with TrackPoint on this laptop under Fedora 21.
The method is identical as the one described in my previous post about Elantech TrackPoint on ThinkPad L430.
1) Create a config file
Create a /usr/share/X11/xorg.conf.d/11-trackpoint-wheel-emulation.conf which will contain:
Section "InputClass" Identifier "Trackpoint Wheel Emulation" MatchProduct "PS/2 Generic Mouse" MatchDevicePath "/dev/input/event*" Option "EmulateWheel" "true" Option "EmulateWheelButton" "2" Option "EmulateWheelTimeout" "200" Option "YAxisMapping" "4 5" Option "XAxisMapping" "6 7" EndSection
You may notice that you doesn’t have a device “PS/2 Generic Mouse” in the system yet (try xinput command), don’t be afraid, once you start your system with psmouse.proto=bare kernel option, the device will be available.
2) Add kernel boot option
Open the /etc/default/grub and add psmouse.proto=bare option to the GRUB_CMDLINE_LINUX and then run the “grub2-mkconfig -o /boot/grub2/grub.cfg”
For example, a snippet of my GRUB_CMDLINE_LINUX:
and then run as root:
$ grub2-mkconfig -o /boot/grub2/grub.cfg
3) Reboot the system
And it should be all.
unable to find device TPPS/2 IBM TrackPoint messages on each new terminal window.