PAM and howdy for facial recognition


I'm trying to setup facial recognition for my ASUS ZenBook ux425e. Everything is looking great, but PAM just does not do anything. It's my first time tinkering with PAM and I suspect I'm just to dense. I've read the arch-wiki pages on PAM and configured several files in /etc/pam.d/ like login, sudo, system* but nothing changes at all. How do I know or check if any changes are taking effect?

Here is my /etc/pam.d/login:


auth sufficient try_first_pass likeauth nullok
#für Gesichtserkennung
auth       required
auth       requisite
auth       include      system-local-login
account    include      system-local-login
session    include      system-local-login
password   include      system-local-login
auth sufficient /lib/security/howdy/

Thanks in advance!


As requested by the forum my garuda-inxi:

  Kernel: 6.2.6-zen1-1-zen arch: x86_64 bits: 64 compiler: gcc v: 12.2.1
    parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-zen
    root=UUID=90037c42-b571-4c45-8b08-1c85d7f7c21e rw [email protected]
    quiet quiet splash rd.udev.log_priority=3 vt.global_cursor_default=0
    resume=UUID=dd8c40ac-6ef7-444a-9a79-89fb7aea15e3 loglevel=3 ibt=off
  Desktop: i3 v: 4.22 info: i3bar vt: 7 dm: LightDM v: 1.32.0
    Distro: Garuda Linux base: Arch Linux
  Type: Laptop System: ASUSTeK product: ZenBook UX425EA_UX425EA v: 1.0
    serial: <superuser required>
  Mobo: ASUSTeK model: UX425EA v: 1.0 serial: <superuser required>
    UEFI: American Megatrends LLC. v: UX425EA.317 date: 08/09/2022
  ID-1: BAT0 charge: 40.8 Wh (80.0%) condition: 51.0/67.1 Wh (76.0%)
    volts: 15.9 min: 15.9 model: ASUSTeK UX425 type: Li-ion serial: <filter>
    status: not charging cycles: 413
  Info: model: 11th Gen Intel Core i7-1165G7 bits: 64 type: MT MCP
    arch: Tiger Lake gen: core 11 level: v4 note: check built: 2020
    process: Intel 10nm family: 6 model-id: 0x8C (140) stepping: 1
    microcode: 0xA6
  Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
    L1: 320 KiB desc: d-4x48 KiB; i-4x32 KiB L2: 5 MiB desc: 4x1.2 MiB
    L3: 12 MiB desc: 1x12 MiB
  Speed (MHz): avg: 1454 high: 1500 min/max: 400/4700 scaling:
    driver: intel_pstate governor: powersave cores: 1: 1500 2: 1500 3: 1250
    4: 1500 5: 1500 6: 1500 7: 1388 8: 1498 bogomips: 44851
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
  Vulnerabilities: <filter>
  Device-1: Intel TigerLake-LP GT2 [Iris Xe Graphics] vendor: ASUSTeK
    driver: i915 v: kernel arch: Gen-12.1 process: Intel 10nm built: 2020-21
    ports: active: eDP-1 empty: DP-1, DP-2, DP-3, DP-4, HDMI-A-1, HDMI-A-2,
    HDMI-A-3, HDMI-A-4, HDMI-A-5 bus-ID: 0000:00:02.0 chip-ID: 8086:9a49
    class-ID: 0300
  Device-2: IMC Networks USB2.0 HD UVC WebCam type: USB driver: uvcvideo
    bus-ID: 2-6:2 chip-ID: 13d3:56eb class-ID: fe01 serial: <filter>
  Display: x11 server: X.Org v: 21.1.7 compositor: Picom v: git-b700a
    driver: X: loaded: modesetting alternate: fbdev,intel,vesa dri: iris
    gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.00x11.22")
    s-diag: 582mm (22.93")
  Monitor-1: eDP-1 model: AU Optronics 0xa48f built: 2020 res: 1920x1080
    hz: 60 dpi: 158 gamma: 1.2 size: 309x174mm (12.17x6.85") diag: 355mm (14")
    ratio: 16:9 modes: 1920x1080
  API: OpenGL Message: Unable to show GL data. Required tool glxinfo
  Device-1: Intel Tiger Lake-LP Smart Sound Audio vendor: ASUSTeK
    driver: sof-audio-pci-intel-tgl
    alternate: snd_hda_intel,snd_sof_pci_intel_tgl bus-ID: 0000:00:1f.3
    chip-ID: 8086:a0c8 class-ID: 0401
  Sound API: ALSA v: k6.2.6-zen1-1-zen running: yes
  Sound Server-1: PulseAudio v: 16.1 running: no
  Sound Server-2: PipeWire v: 0.3.67 running: yes
  Device-1: Intel Wi-Fi 6 AX201 driver: iwlwifi v: kernel bus-ID: 0000:00:14.3
    chip-ID: 8086:a0f0 class-ID: 0280
  IF: wlo1 state: up mac: <filter>
  Device-1: Intel AX201 Bluetooth type: USB driver: btusb v: 0.8
    bus-ID: 2-10:3 chip-ID: 8087:0026 class-ID: e001
  Report: bt-adapter ID: hci0 rfk-id: 5 state: down
    bt-service: enabled,running rfk-block: hardware: no software: yes
    address: <filter>
  Hardware-1: Intel Volume Management Device NVMe RAID Controller driver: vmd
    v: 0.6 port: N/A bus-ID: 0000:00:0e.0 chip-ID: 8086:9a0b rev: class-ID: 0104
  Local Storage: total: 476.94 GiB used: 23.69 GiB (5.0%)
  SMART Message: Required tool smartctl not installed. Check --recommends
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Intel model: SSDPEKNW512G8
    size: 476.94 GiB block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s
    lanes: 4 type: SSD serial: <filter> rev: 004C temp: 36.9 C scheme: GPT
  ID-1: / raw-size: 229.89 GiB size: 229.89 GiB (100.00%)
    used: 23.66 GiB (10.3%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:2
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 25.9 MiB (8.6%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
  ID-3: /home raw-size: 229.89 GiB size: 229.89 GiB (100.00%)
    used: 23.66 GiB (10.3%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:2
  ID-4: /var/log raw-size: 229.89 GiB size: 229.89 GiB (100.00%)
    used: 23.66 GiB (10.3%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:2
  ID-5: /var/tmp raw-size: 229.89 GiB size: 229.89 GiB (100.00%)
    used: 23.66 GiB (10.3%) fs: btrfs dev: /dev/nvme0n1p2 maj-min: 259:2
  Kernel: swappiness: 133 (default 60) cache-pressure: 100 (default)
  ID-1: swap-1 type: partition size: 16.86 GiB used: 0 KiB (0.0%)
    priority: -2 dev: /dev/nvme0n1p5 maj-min: 259:5
  ID-2: swap-2 type: zram size: 15.32 GiB used: 181.7 MiB (1.2%)
    priority: 100 dev: /dev/zram0
  System Temperatures: cpu: 45.0 C mobo: N/A
  Fan Speeds (RPM): N/A
  Processes: 296 Uptime: 2d 2h 16m wakeups: 4421 Memory: 15.32 GiB
  used: 3.04 GiB (19.8%) Init: systemd v: 253 default: graphical
  tool: systemctl Compilers: gcc: 12.2.1 Packages: pm: pacman pkgs: 1351
  libs: 373 tools: pamac,paru Shell: Bash v: 5.1.16 running-in: alacritty
  inxi: 3.3.25
Garuda (2.6.15-1):
  System install date:     2023-01-04
  Last full system update: 2023-03-17 ↻
  Is partially upgraded:   No
  Relevant software:       snapper tlp NetworkManager mkinitcpio
  Windows dual boot:       Probably (Run as root to verify)
  Failed units:            

Hi there, welcome to the forum!
Any possible hint in the package comments?
Additionally, I see there is a Arch Wiki page, but I guess you already saw that, give the configuration you've shown.


Thank you for the warm welcome!

Well, yes. There might be a problem with python2 and python3 (I'm using 3) but howdy did add my face without error, although I don't know how to verify if it works. Anyway, I think the problem is with pam and I'm not even certain that it's doing anything. Is there a log or can I make easy changes to check if i3 is using it at all?

I use Howdy very successfully
This is the WiKi Howdy - ArchWiki

If you are using the Version 3.0.0 Beta from AUR then don't use that last line, use

auth sufficient /lib/security/

as the first line in the two Pam modules
polkit-1 & sudo

The additional line needs to be at the top, added as a new line.



Thank you for your answer.

I'm not using the beta but howdy 2.6.1-2 and followed the instructions of the wiki page. It only said add auth sufficient /lib/security/howdy/ Anyway I put it at the top now and I didn't know to include polkit-1.
It changes nothing and I still don't know if any of it takes effect. Is there an easy way to trouble shoot this? For example a command to deactivate password promt without installing extra modules and complicating the situation, just to see if anything is happening or if I made a mistake with howdy? I'm totally in the dark as to what the problem is because there is no change what so ever.

OK, well if you are using 2.6.1-2 then the line you insert at the top of the pam module is

auth sufficient /lib/security/howdy/

If sudo howdy test works and you have added a face profile then all there is to do is modify the pam modules to suit your requirements.

The additional lines though need to be the first lines when the module is read.

Try uninstalling 2.6.1.-2 and add howdy-beta-git the install is more straightforward and add the correct line to your pam modules.


1 Like

It's kind of working now, but the recognition is super bad. But my initial problem is solved.
Is there a way to train the AI?

Add more face models, different light, glasses, no glasses etc.



You could also change the video certainty in howdy config to 4.0, or even 4.5.


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