After several days of using my Lenovo m5400 I’ve faced serious problem with built-in touchpad. Sometimes it didn’t work at all, sometimes every touch I made was understood as scrolling, sometimes it was stuck for several seconds and started to work again. It seems that problem somewhere in driver, I tried to reinstall/update it, but it didn’t help. Since I was using my laptop only at home I decided to buy an external mouse and don’t use touchpad at all. But recently I tried again to solve this issue. After some time clicking around it turned out that it’s quite easy to make it work.
Just in case I’m running Windows 8.1 on Lenovo m5400 with i5-4200.
Press super and search for “Mouse settings”, select Change mouse settings
Then select Device Settings, Synaptic TouchPad… device and press Settings, you’ll see following window:
Then I disabled everything except Two-Finger Scrolling option and also changed sensitivity of Palm Check because I think that touchpad wasn’t working because it wasn’t able to distinguish palm from finger sometimes and was blocking touchpad.
After this manipulation touchpad start to work much more better!