I installed the fingerprint reader successfully on Ubuntu 16.04 and ran fprintd-enroll with apparent success. When I rebooted, the fingerprint was requested but failed 3 times and then asked for my password. I thought I'd try enroll again, but it failed before it finished and I had to control c out. Logged out and in and tried again, but now I consistently get a failure "device already claimed." How can I clear that claim so I can try again? And/or, how do I uninstall it? Sorry, I'm a noob with Linux.
I installed on my T410 using: sudo apt install libpam-fprintd as shown on page: How to install a fingerprint reader on Lenovo ThinkPad