I was not having any issue with two-finger scrolling on my T560 and kernel 4.18.0-18-generic. I was trying to resolve a separate problem, that the pointing stick pointing in the center of the keyboard wasn't functioning, and would in fact cause the touchpad to stop functioning if I attempted to use it. The pointing stick's function was restored by adding psmouse.proto=imps to my bootloader options. However, now my touchpad 1) refuses to send scroll events, and 2) refuses to stop emulating mouse clicks (even after it's been disabled in tweaks). I've attempted every fix on this thread, with no success. Some of them cause the pointing stick to stop working again.
I was not having any issue with two-finger scrolling on my T560 and kernel 4.18.0-18-generic. I was trying to resolve a separate problem, that the pointing stick pointing in the center of the keyboard wasn't functioning, and would in fact cause the touchpad to stop functioning if I attempted to use it. The pointing stick's function was restored by adding psmouse.proto=imps to my bootloader options. However, now my touchpad 1) refuses to send scroll events, and 2) refuses to stop emulating mouse clicks (even after it's been disabled in tweaks). I've attempted every fix on this thread, with no success. Some of them cause the pointing stick to stop working again.