I've installed Ubuntu 17.10 on the Xiaomi Notebook Ari 13'3 but I couldn't get the fingerprint function running for logon. The Fingerprint GUI sees no device at all. Maybe there are necessary drivers for the Xiaomi Fingerprint sensor?
Here's the output (partial) of lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 8087:0a2b Intel Corp.
Bus 001 Device 003: ID 04f3:0c1a Elan Microelectronics Corp.
Bus 001 Device 002: ID 04f2:b5a3 Chicony Electronics Co., Ltd
...
lsusbcommand. This should enumerate the fingerprint reader device, which will help us better troubleshoot your issue. – richbl Jan 03 '18 at 17:26lsusbmore legible. – richbl Jan 04 '18 at 15:48lsusbtells us is that the fingerprint device is from Elan Microelectronics Corp (device 04f3:0c1a). We can use that information to better troubleshoot your issue. – richbl Jan 04 '18 at 15:49libfprintproject. However, there's a very recent project up on GitHub that's doing some work directly related to the Elan fingerprint sensors. In fact, there's a recent request for support of your specific device noted here. I'd suggest you contact the developer, let them know you have the device, and offer to help out. – richbl Jan 05 '18 at 05:34