ThinkPad : Linux : Scrolling after reboot
After a reboot my gpointing-device-settings would never stick for middle mouse button emulation and scrolling. After looking around this seems to be a bug with the gpointing-device-settings application, but buried in the bug report comments a user has found a fix/hack.
This workaround seems to fix the issue on my X220 and makes the scrolling persistent even after reboot.
In the file /usr/share/X11/xorg.conf.d/20-thinkpad.conf (if it doesn't exist, create it.) put the following contents:
Section "InputClass" Identifier "Trackpoint Wheel Emulation" MatchProduct "TrackPoint" MatchDevicePath "/dev/input/event*" Driver "evdev" Option "EmulateWheel" "true" Option "EmulateWheelButton" "2" Option "Emulate3Buttons" "false" Option "XAxisMapping" "6 7" Option "YAxisMapping" "4 5" EndSection
reference: https://bugs.launchpad.net/ubuntu/+source/gpointing-device-settings/+bug/489830/comments/30 (thanks Tommi!!!)