I’m running EndeavourOS (Gnome) on an XPS 9720. It runs fine for hours, and then at some point the touchpad will become unstable/unusable (stops responding for a few seconds, then works for a few seconds, then stops responding again, then scrolls the screen when it should be moving the cursor, etc.).
I tried other distros (Ubuntu, Fedora and openSUSE), and another DE (KDE), but it happens there too. Opened a support case with Dell and they replaced the touchpad, but the issue still occurs.
Maybe this thread (my first thread ever) may be of help to you, too? On my old Dell laptop, I could solve issues by installing other touchpad drivers and changing settings in its configuration files:
I had a really similar problem on a lenovo laptop, it was because the touch pad got too warm. Did you try to use it with windows with the same kind of workload?
try using the gpu on the cpu, make sure the nvidia gpu isn’t used if not playing something. With an intel+nvidia combo, this laptop is a furnace with linux for sure.