Dump the firmware

Assuming this is a fresh install, lets do some magic by getting some dependencies:

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sudo dnf install gcc git python-pip python-devel openssl

Let’s get the source code:

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git clone --recurse-submodules https://github.com/goodix-fp-linux-dev/goodix-fp-dump.git
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cd goodix-fp-dump

Create an isolated Python environment:

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python -m venv .v
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source .v/bin/activate

Do the magic:

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sudo su
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pip install -r requirements.txt
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python run_55b4.py
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exit

There are some python scripts available. I run run_55b4.py because my device ID is 27c6:55b4. It will spell some nonsense, which is a good thing. That nonsense actually the firmware captured by our device. Also, I typed exit because we want to enroll our finger in our own user, not root. If we run the fprintd-enroll as a root, the finger will be for root, not us. Anyway,

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fprintd-enroll
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Using device /net/reactivated/Fprint/Device/0
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Enrolling right-index-finger finger.
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-stage-passed
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Enroll result: enroll-completed

Yes! In my case, the fingerprint need to add my right index finger ten times. I was confused at first because the lack of message. I thought it was error. But, it didn’t. After that, everything in the system is automatically pick the fingerprint as one way to authenticate.

Overall

There is nothing to change. Fedora 40 will automatically enable fingerprint login.

Dual Boot

Dual booting with Windows 11 will make the fingerprint firmware rewritten. We need to redo the magic:

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source .v/bin/activate
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sudo su
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pip install -r requirements.txt
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python run_55b4.py
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exit

SDDM

NOTE: I have done this before. However, I have disabled this as it doesn’t unlock KWallet. I am writing this for future if I am bored and want to do some hacking on the SDDM device.

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auth [success=1 new_authtok_reqd=1 default=ignore]  pam_unix.so try_first_pass likeauth nullok
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auth sufficient  pam_fprintd.so

Source

• https://discussion.fedoraproject.org/t/d-k-bo-libfprint-goodixtls/43849
• https://copr.fedorainfracloud.org/coprs/d-k-bo/libfprint-goodixtls
• https://github.com/goodix-fp-linux-dev/goodix-fp-dump