Dell has done it again, they have a lineup of bad Touchpads on their new XPS 13 7390 portfolio, their trackpads comes defected out of the box with one of 3 main issues
Dead Spot on the touchpad
Dead/unresponsive touchpad
erratically behaving touchpad specially with gestures functions and scrolling.
Personally, I suffered from the last issue with erratic behavior that progressed to totally dead touchpad on my new late 2019 XPS-13 7390 (6 Cores Machine) I am detailing my experience with Dell in the lines below
Problem
DELL XPS 13 7390 Touchpad is defected on an out of the box PC, Touchpad was first erratic in its motion specially with the gestures (Two or Three fingers gestures and scrolling)
Behavior was observed on all applications running, so no compatibility issue with any SW running on PC. Given that no 3rd party was yet installed (out of the Box unit)
HID and PS/2 driver were upgraded same erratic behavior.
HID and PS/2 drivers were removed and reinstalled but yet behavior either erratic or not responsive touchpad.
Behavior was observed on BIOS and Diagnosis screens. BIOS version is latest BIOS version released by DELL
Situation became worse as touchpad stopped working entirely, and being relocated outside the US at that time it took me 3 weeks to get DELL engaged and On-Board to resolve the issue after spending some extra to upgrade my warranty to fix DELL defected touchpad.
Solution
Replace the touchpadwhich is actually called replacing Palm-Rest as it turned out that XPS is entirely built on the palm-rest with everything fixed onto it.
Technician has to literally to tear down the Out of the BOX PC to replace the Touchpad - Photo Attached - and then re-assemble the PC again.
