I'm using a ThinkPad L440 with a Synaptics touchpad. A while ago (~1-2 months) the touchpad started acting strange when trying to move the mouse pointer diagonally.The picture shows the first line drawn with an external mouse, second with the trackpoint and the last one with the touchpad.At first I thought the issue was related to libinput or a kernel update but even after booting into older distros (like Ubuntu 14.04 without libinput and with older 3.16 kernel), the problem still prevails.Any ideas?
Diagonal touchpad movement results in wobbly line
linux;touchpad;thinkpad