YubiKeys & GPG on Ubuntu 24.04

YubiKeys stopped working with GnuPG (PGP) after a release upgrade from Ubuntu 22.04 (focal) to Ubuntu 24.04 (noble) on my device(s):

gpg --card-status
gpg: selecting card failed: No such device
gpg: OpenPGP card not available: No such device

GnuPG device error on Ubuntu 24.04 with attached YubiKey

GnuPG did not detect the attached YubiKey after the release upgrade. Similar issues have been reported on https://bugs.launchpad.net/ubuntu.

Yubikeys & GnuPG on Ubuntu 24.04

Required apt packages

sudo apt install gnupg2 libpcsclite1 pcscd scdaemon
sudo systemctl enable --now pcscd

GnuPG scdaemon configuration

cat .gnupg/scdaemon.conf

disable-ccid
pcsc-shared

Restart gpg-agent

pkill -9 gpg-agent

Verify GnuPG works with YubiKey

gpg --card-status
Reader ………..: Yubico YubiKey FIDO CCID 01 00
...

Optional: Install YubiKey Manager for Ubuntu 24.04 by downloading the AppImage Applications from: https://www.yubico.com/support/download/yubikey-manager

P.S.: Follow this steps to disable smartcard-authentication if your Ubuntu Login defaults to your YubiKey instead of your password: https://ubuntu.com/tutorials/how-to-use-smart-card-authentication-in-ubuntu-desktop#4-configure-gdm