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ThinkPad T495 で, Ubuntu 20.04 上から finger print を利用する


firmware の確認

下記のコマンドを実行し, fingerprint reader のバージョンを確認します

fwupdmgr get-devices

Image from Gyazo

firmware のアップデート


fwupdmgr get-updates

Image from Gyazo

fwupdmgr update

Image from Gyazo

fingerprint reader のライブラリを導入

sudo apt install fprintd libpam-fprintd

pam-auth-update で更新

/usr/share/pam-configs/ 配下の設定を一つのモジュールのように認識してくれます

pam-auth-update - Ubuntu Manpage

sudo pam-auth-update

ダイアログが表示されるので, fingerprint authentication を選択します

Image from Gyazo

/etc/pam.d/common-auth の更新

ユーザー認証のためのモジュール, PAM(Pluggable Authentication Modules)の設定を更新します

sudo vim /etc/pam.d/common-auth

Image from Gyazo


auth [success=2 default=ignore] pam_fprintd.so max_tries=1 timeout=10

pam_unix.so との順番が大切です



fprintd-enroll $USER

何度か enroll が要求されます

Image from Gyazo


Using device /net/reactivated/Fprint/Device/0
failed to claim device: Open failed with error: Device 06cb:00bd is already open


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Help us understand the problem. What are the problem?