Re: Need external fingerprint reader that will attach to an ASUS PN50
Older Elan readers are fully supported, along with those from major brands.
Readers which impose encryption protocols may not be recognized, so (since it can be difficult to find the chipset in use) you should really buy with reserve if you own GNU/Linux systems and explicit support is not declared in the specifications from the seller.
From Debian Supported: https://fprint.freedesktop.org/supported-devices.html
There are probably more that I'm not aware of currently, but that's a good start.
"When you practice gratefulness, there is a sense of respect toward others." >>Dalai Lama