New Linux user here, patience is appreciated.

I've been trying for a few days to troubleshoot this issue. Out of the box, touchpad left clicks would only work 30% of the time, followed by a ton of left clicks when moving the cursor, then the occasional drag just from moving the cursor. Two finger scroll works. The touchpad works fine in Windows 10. Turning off tap to click prevents these random clicks and drags from the mouse, but I'd really prefer to have both functionalities.

So far, in order to get a functional trackpad (no two finger scroll, just L/R click and scroll with middle button), I make it recognized as a generic PS/2 Mouse:

sudo nano /boot/efi/loader/entries/Pop_OS-current.conf

add "psmouse.proto=imps" to options

This doesn't always get me back to a simple PS/2 recognition of the touchpad, though. I'm still experimenting.

I can recreate the recognition of the AlpsPS/2 ALPS DualPoint TouchPad and Stick

sudo nano /boot/efi/loader/entries/Pop_OS-current.conf

add to options i8042.nopnp=1 pci=nocrs (make sure quiet and splash are also there)

I've also tried sudo apt-get install xserver-xorg-input-synaptics, that's not helping either.

I've tested trackpad functionality with USB Boot tests of both Ubuntu 22.04 and Pop 22.04 on a Lenovo Thinkpad x250. The touchpad is working correctly and is recognized in xinput --list as either
Synaptics TM3075-002
TPPS/2 IBM TrackPoint

I also lost sight of my Pop!_OS option in the BIOS boot menu after updating Lenovo firmware from a notification prompt. Perhaps that's a topic for another post, though. I was hoping that firmware would improve the trackpad, but it doesn't seem to have changed anything.

Anyone have any ideas, or had any similar issues with Lenovo Thinkpads? touchpad trackpad etc

I had a similar problem with a Lenovo laptop. Turning off 'One Finger' under tap to click (but leaving two and three fingers working) fixed it for me. I spent quite a while looking for another fix, but eventually gave up.

Thanks for your reply. Yeah, that seems to be the best working solution at the moment. Apart from cookin' up a new driver or something of the sort, having to push the trackpad (as opposed to tap) isn't so bad. Still beats Windows!