How I got my HP fingerprint sensor working on Linux.

Mark Ndubuisi
I bought a used HP EliteBook 840 G5 last year. Cleaned it up, wiped Windows, put Ubuntu on it. Everything worked except the fingerprint reader, which I figured I'd get to "eventually." "Eventually" turned out to mean three sessions, several wrong turns, a USB reverse engineering side quest, and a one-line fix that fixes the same problem for a chunk of HP laptops nobody had been able to use on Linux. The expectation: just install a driver This is the thing non-Linux people (and a lot of Linux peo