So, apparently #Lenovo's built in #touchpad doesn't work out of the box in #Linux. Can't say I'm happy about this. I don't often use the mouse, but still …
Interestingly, if I boot with i8042.debug there's a lot of stuff going on, but the driver doesn't seem to interpret it correctly. Which at least means it should be … not too hard to fix (famous last words …)
Everything else (so far) seems to be working, but I'll probably start finding out other issues as I do more testing.