Confirmed on HP ProBook 4520s
Linux laptop 3.2.0-31-generic #50-Ubuntu SMP Fri Sep 7 16:16:45 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Bus 001 Device 003: ID 138a:0007 Validity Sensors, Inc. VFS451 Fingerprint Reader
Confirmed on HP ProBook 4520s
Linux laptop 3.2.0-31-generic #50-Ubuntu SMP Fri Sep 7 16:16:45 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Bus 001 Device 003: ID 138a:0007 Validity Sensors, Inc. VFS451 Fingerprint Reader