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appelgriebsch/t480-fedora-fingerprint.md

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Created November 20, 2022 10:51
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ThinkPad T480 fingerprint reader on Fedora Linux
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t480-fedora-fingerprint.md

ThinkPad T480 fingerprint reader on Fedora Linux

Background

The Synaptics fingerprint sensor (06cb:009a) present on my T480 is not supported by libfprint and fprintd as it requires a non-free binary blob. uunicorn created open-fprintd, a replacement for fprintd, that allows for loading of binary blobs. In conjunction with their python-validity driver we are able to make use of the inbuilt fingerprint reader. The following instructions were tested against Fedora Linux 35.

Installing open-fprintd and python-validity

sudo dnf copr enable tigro/python-validity
sudo dnf install open-fprintd fprintd-clients fprintd-clients-pam python3-validity

Prepare the fingerprint reader

sudo touch /usr/share/python-validity/backoff
sudo touch /usr/share/python-validity/calib-data.bin
sudo validity-sensors-firmware
sudo python3 /usr/share/python-validity/playground/factory-reset.py
sudo chmod 0755 /usr/share/python-validity/6_07f_lenovo_mis_qm.xpfwext

Enable services

sudo systemctl enable python3-validity open-fprintd-resume open-fprintd-suspend
sudo systemctl start python3-validity

Enroll and test fingerprint

fprintd-enroll
fprintd-verify

Enable authentication with fingerprint

sudo authselect current
sudo authselect enable-feature with-fingerprint
sudo authselect apply-changes
@appelgriebsch
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ok sorry for spamming but happy news! i've managed to make it work! tada

all you have to do is:

sudo touch /usr/share/python-validity/backoff
sudo touch /usr/share/python-validity/calib-data.bin

now you have to follow the instructions here: https://github.com/uunicorn/python-validity#error-situations and then:

cd /usr/share/python-validity && ls -la

find driver file. in my case there is driver named: 6_07f_lenovo_mis_qm.xpfwext so:

sudo chmod 755 6_07f_lenovo_mis_qm.xpfwext

and the best part: i had to repeat these steps few times and in the end i've managed to enroll my finder v

best wishes!

@appelgriebsch
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appelgriebsch commented Nov 27, 2022 •
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I had the exact same problem on Fedora 36 (was working fine on 35), I managed to fix it changing "/usr/lib/systemd/system/open-fprintd-resume.service" to this:

[Unit]
Description=Restart devices after resume
After=suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target

[Service]
Type=oneshot
ExecStart=systemctl restart open-fprintd.service python3-validity.service

[Install]
WantedBy=suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target

Here's the thread where I found the solution: uunicorn/python-validity#106

@fabtjar
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fabtjar commented Mar 31, 2023

Works for me on Fedora 37! Thanks very much.

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