First things first, I should say that I'm a real newbie when it comes to Ubuntu -- I've been using it for no longer than three months and have no previous experience with any other OS except for Windows. That said, I'm glad I found this community.
I work on an Acer Extensa 2509 (a bit overpowered) and I had no problems going from 20.04 to 20.04.1 LTS. But after some minor updates via the Software Updater (I only read 'Ubuntu base', not paying much attention to the details), and after the reboot, the keyboard+touchpad stopped working.
Using a plug-in USB keyboard & mouse I re-installed the OS, and noticed that the built-in keyboard works properly until I have to reboot my PC. After that I constantly return to the starting point.
Any suggestions will be much appreciated. Cheers!
EDIT: I replaced the 20.04 release with the 18.04.5 -- keyboard & touchpad work perfectly now. I will surely come back soon to 20.04 and try to solve the problem anyway.