After upgrading to Kubuntu 18.04 from 17.10 my built-in keyboard on HP Envy 15 stopped working in Plasma only. Touchpad works, external usb keyboard works. Please kindly help
the software/package Kubuntu 17.10 used for that keyboard, can be deleted during the upgrade. that can happen in the proces were all deemed´unnessesary´ packages are deleted and replaced by the new/updated ones from the new OS version.
the only tip i can give you, is to look at ´additional drivers´ in 18.04. there might be software showed for the keyboard.