I have a Dell XPS 15 9560 running Ubuntu 17.04, and the cursor jumps to the bottom of the screen when I am moving the pointer with one finger and then I click near the bottom of the touchpad with another finger before lifting my original finger.
I have tried the following, none of which fix the problem:
- Disable Tap to click
- Disable Two finger scroll
- Install either or both of xserver-xorg-input-libinput and xserver-xorg-input-synaptics
- Enable and narrow palm detection as described here
I didn't get very far with just libinput though, because my keyboard did not work at all.
This issue might be mentioned here or here but I can't be sure if it's the same because no one mentions the two-finger nature of my problem.
The only workaround I have is to only use one finger on the touchpad at a time, but this is very slow and cumbersome.
$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ ELAN Touchscreen id=12 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=14 [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)]
↳ Video Bus id=8 [slave keyboard (3)]
↳ Power Button id=9 [slave keyboard (3)]
↳ Sleep Button id=10 [slave keyboard (3)]
↳ Integrated_Webcam_HD id=11 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=13 [slave keyboard (3)]
↳ Dell WMI hotkeys id=15 [slave keyboard (3)]
UPDATE: This was a hardware issue. I contacted Dell support and they ran some tests to determine the touchpad was defective.
