I upgraded from 17.04 to 17.10 on a Lenovo T540p which has broken two finger touchpad scrolling and right clicking

Trackpad two finger scrolling and right-click issue with Ubuntu 17.10 (i386, 64bit, GNOME 3.26.1) on a Lenovo T540p (the model with a Intel Core i5-4210M Haswell CPU etc)

Solution 1:

I have the same issue on my Thinkpad T450s. This issue is referenced on launchpad here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1722478

It seems to happen after a resume. The workaround described on LP1722478 works for me:

sudo modprobe -r psmouse
sudo modprobe psmouse

Solution 2:

Update for other ThinkPad users, as per the hard work done here, the workaround is as follows...

Edit the file /etc/default/grub and change the line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash psmouse.synaptics_intertouch=0"

then

sudo update-grub

and reboot.

Solution 3:

I guess I know what you mean. If you install Gnome Tweaking Tool, a.k.a. Tweaks, you can go to Keyboard & Mouse > Click Method > Fingers. That might solve it.