I haven't run this exact expression on the laptop with the sensor yet. For future readers, something like:

FP_TOD_DRIVERS_DIR=${libfprint-2-tod1-goodix}/usr/lib/libfprint-2/tod-1/ 

is how you load the driver. You can debug withG_MESSAGES_DEBUG=all. For internet searchers, if you run with G_DEBUG=all you're forcing glib in to strictly resolving symbols causing undefined symbol: LivenssDetection.

Result of nixpkgs-review pr 104915 run on x86_64-linux 1

Hello @grahamc , thanks for this PR.

Is there anything I can help with to get this out of the draft stage?

I also have a XPS 9300, so I can help with any testing.

works great on a xps 9500 ! 👍
I added to my configuration:

systemd.services.fprintd.environment = { FP_TOD_DRIVERS_DIR = "${pkgs.libfprint-2-tod1-goodix}/usr/lib/libfprint-2/tod-1"; };

rebasing this on latest master fails the build and the only difference I see so far is ninja version

PS: I'm not complaining just trying to test it 😉

This is how I use it. And it works perfectly! Thanks!

{
  services.fprintd = {
    enable = true;
    package = pkgs.fprintd.override {
      libfprint = pkgs.libfprint-tod;
    };
  };
  systemd.services.fprintd.environment = {
    FP_TOD_DRIVERS_DIR = "${pkgs.libfprint-2-tod1-goodix}/usr/lib/libfprint-2/tod-1";
  };
}

overlay

self: super:
{
  libfprint-tod = super.callPackage ./libfprint-tod { };
  libfprint-2-tod1-goodix = super.callPackage ./libfprint-2-tod1-goodix { };
}

PS: XPS 13 9310

I'm using this for 2 weeks straight and there is no issues at all. I think it's pretty safe to merge this one. Thanks.

@ofborg eval

I updated this to use 1.90.7+tod1 and checked it works on nixos-unstable-small.

I've raised a PR with a separate driver for Goodix 550a by Lenovo: #226056. Reviews appreciated.