Can someone give me a heads up how to better respond to seemingly far to broad questions which might be solvable by observing an issue first hand and with the consent and trust of a user to not do anything fishy with their data or hardware?
I guess I would be able to solve the following case at some point in time, probably even without having the hardware in front of me: Virus in windows killed mouse also not working in Ubuntu
But asking for the disk image or several ROM/Option ROM or whatever dumps is way beyond what I think this site is about and I wouldn't want anyone to publish sensitive data to the entire Internet just to analyze a probably trivial issue.
With several uncovered nasty privacy violations in firmware from different computer manufacturers (like Lenovo, sorry can't remember the name of the thing that was uncovered after Superfish and any similar cases from other manufacturers), it seems possible that such kind of PUP exists, a user may just not be able to describe it detailed enough.