Touchpad does not register mouse movement

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My Surface Laptop Studio touchpad worked fine until I installed the nvidia drivers on Ubuntu 22.04. The touchpad is physically working---I can see this via this tool:

sudo libinput debug-gui

However, moving my finger on the touchpad no longer moves the cursor. But pressing-and-moving does indeed move the cursor.

$ sudo libinput quirks list /dev/input/event20

These settings seem to make sense when I run sudo libinput measure touchpad-pressure, but maybe I am not understanding what it is supposed to do. It looks like a light touch shows "up" and a heavy touch shows "down"....

$ uname -a
Linux moctar 6.3.2-surface #1 SMP PREEMPT_DYNAMIC Fri May 12 15:00:39 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
$ cat /sys/class/dmi/id/modalias 
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Turns out this was from not being on xorg instead of wayland. After switching to wayland on login, the touchpad seems to work fine.

I sit in a Tesla and translated this thread with Ai:


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