Gpd micropc track pad not working properly

Hello,

i got my gpdmicropc yesterday and installed the specific ubuntu-mate distro for it straight away. everything seemed to work fine, but since today the track pad isnt working properly anymore. i can scroll alright but i can't seem to double click on anything using the track pad. also the pointer likes to jump back to where it was when moving it, making it really hard to click on anything on that small screen really.
things i tried so far: messing with the mouse settings in the control center, reinstalling a bunch of drivers, turning it on and off a bunch of times.
i also tried turning the mouse keys on in "keyboard accessibility" which doesn't seem to work either by the way.
any suggestions what else i could try?
thanks in advance