I've lost track of this thread, but after a few years of frustration, I've only just now came across this simple registry edit solution that worked for me!
XPS 13 9343
Windows 10 Home
version 1709
build 16299.125
Copied and pasted from original post by user "thl6118" at http://en.community.dell.com/support-forums/laptop/f/3518/p/19654037/21038442
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I know that many users find that the touchpad on XPS 13 (Early 2015) is not responsive, has poor scrolling performance etc. and tried to install many different types of 3rd party drivers.
I have found a solution that has dramatically improved touchpad performance in Windows 10 (for Dell XPS 13 - 9343).
It does not require any Synaptics drivers (trust me, I have manually updated the driver many times from 3rd party websites, the solutions didn't work)
This requires registry changes:
- Run - regedit
- Navigate to: HKEY_LOCAL_MACHINE -> SOFTWARE -> Microsoft -> Windows -> CurrentVersion -> PrecisionTouchPad
- Change the "CurtainDismissDistance" and "CurtainDismissTime" to 0 (this will eliminate any lag or delays)
- Change the "GestureScrollMaxDistance" to your liking (I set it as 40 (hexadecimal value)
- Restart
It works in Windows 10. You may want to create system restore point before doing the above. Cheers