According to the upstream bug, this appears to be a new intended behavior with newer gnupg2:
https://dev.gnupg.org/T6871 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2061708 Title: Yubikey stopped working after noble upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/archlinux-lp/+bug/2061708/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs