This is indeed an upstream issue with kernel 5.4.x, reported at:
There aren't any proposed solutions / patches at the moment for it however. If I get the time tomorrow I'll look into the git history for the elantech input driver changes and see if I can find where the issue may lie.
JoshStrobl Thank you very much! I'll wait for the patch then.
AlienTux I don't know if this solves it for you, but my touchpad stopped working after upgrading to a newer kernel. I solved it with the following:
I created the file /etc/modprobe.d/elan.conf and put options psmouse elantech_smbus=0 in there.
I'm going to be revert us 5.3 series (bumping us from 5.3.13 to 5.3.15), which shouldn't have some of the i2c changes that affect the Elantech touchpad (since those landed for 5.4 series). Information on sync blocking and ETA here.
buddyspencer did the folder exist already or should I create it? I can't find it in my system.
AlienTux I had to create it.
buddyspencer appreciate it, will give it a go after debugging the kernel issues with JoshStrobl.
Alas, the workaround of creating mod probe.d Etc. failed for my Lenovo ThinkPad I got in 2021. I think I’ve got Solis version 4.3. Anyone have any ideas for a new work around?
Frank-Starr this is likely to get locked because it's an old thread that you necro'd here, but this is recent and lots to consider in it: https://discuss.getsol.us/d/8797-my-mouse-is-invisible
thank you for the advice tho 
