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uunicorn / python-validity

Validity fingerprint sensor prototype
MIT License
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Unable to start python3-validity service || Exception: No supported validity device found #118

Open LeonardoMantovani opened 2 years ago

LeonardoMantovani commented 2 years ago

I've seen a video on YouTube that was showing how to enable fingerprint support on Linux even for fingerprint readers not supported by fprint, thanks to this package.

I tried installing the package on Fedora 35 as described in the ReadMe but, after fprintd-enroll I got the following error:

Impossible to enroll: GDBus.Error:net.reactivated.Fprint.Error.NoSuchDevice:

So, as the ReadMe suggests, I checked the status of python3-validity and I saw it was inactive (dead). Continuing to follow the instructions, I tried to factory reset my fingerprint sensor but with the command sudo validity-sensors-firmware I got this output:

Traceback (most recent call last): File "/usr/bin/validity-sensors-firmware", line 92, in raise Exception('No supported validity device found') Exception: No supported validity device found

What am I doing wrong? Maybe the video was lying, and this package don't support all fingerprint sensors? And, in that case, is there a way I can help to have my sensor supported?

(In case it could be useful, this is the information I got with lsusb about my fingerprint sensor):

Bus 003 Device 004: ID 27c6:6094 Shenzhen Goodix Technology Co.,Ltd. Goodix USB2.0 MISC

physicophilic commented 2 years ago

Hi, I have the same situation but I'm on Ubuntu 20.04.

I reset my sensor and then got the same no supported device error.

My sensor:

27c6:538d Shenzhen Goodix Technology Co.,Ltd. FingerPrint

Now we have two Goodix sensors requesting support! Could someone please look into this? Thanks!

argibbs commented 2 years ago

It's (probably) not the sensors.

I got this working on Ubuntu straight out of the box, then tried Fedora, and hit the same issue.

Looks like in the copr repo, the install is not quite right, specifically you're missing a couple of files. Once they exist, the app will populate them, but it blows up if it can't find them.

See https://www.mark-gilbert.co.uk/validity-fingerprint-sensor-06cb009a-on-lenovo-x1-carbon-running-fedora/, specifically:

Create two missing files that don’t get created $ sudo touch /usr/share/python-validity/backoff && sudo touch /usr/share/python-validity/calib-data.bin

This didn't completely solve my problem; fprintd-enroll was working, but the sensor wasn't firing and the journalctl logs showed lots of timeouts.

So I reset the firmware as described in the link above ☝️ and in the troubleshooting section in this project's README. And that fixed it.