I recently upgraded my 900x3a notebook from 14.04 -> 16.04.
Since then the touchpad performance is bad. The pointer will sometimes freeze or execute ungiven commands. When this happens I often see an increase in CPU usage. First I thought its a xserver problem but when I add an USB mouse these problems dont occur (with the mouse, still occur with the touchpad).
I also tried a lubuntu 16.04 live USB stick and was able to reproduce the problem.
The linked solution posted in Mouse pointer (touchpad) getting stuck often in 12.04
(CTRL+ALT+F2) and back (CTRL+ALT+F7) works as a temporary fix if the problem occurs but does not solve this as the problem just will reoccur. Should I report this as a bug?
I changed to ´libinput´ as suggested below and both frequency and severeness of the problem decreased. As requested here is the input of the xinput command:
⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ SynPS/2 Synaptics TouchPad id=12 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Sleep Button id=9 [slave keyboard (3)] ↳ WebCam SC-13HDL10931N id=10 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=11 [slave keyboard (3)]
The problem might be connected to the use of scrolling or other multifinger commands but I have not had a sufficient number of incidents to be sure.
Do you have any suggestions how to fix this or what to try next?