To verify if the problem really is with libinput please try:
1. Install the old Xorg touchpad driver:
sudo apt install xserver-xorg-input-synaptics
2. Reboot and then only log into Xorg sessions.
If that avoids the problem then please confirm by:
3. sudo apt remove xserver-xorg-input-synaptics
4. Reboot and verify the bug returns in Xorg sessions.
** Tags added: disco
** Summary changed:
- Jumpy touchpad input when upgrading to 19.04 from 18.04
+ Jumpy touchpad input on Dell XPS 9370 when upgrading to 19.04 from 18.04
** Changed in: libinput (Ubuntu)
Status: New => Incomplete
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which is subscribed to libinput in Ubuntu.
https://bugs.launchpad.net/bugs/1821169
Title:
Jumpy touchpad input on Dell XPS 9370 when upgrading to 19.04 from
18.04
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1821169/+subscriptions
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