Public bug reported:
[What happened]
The GNOME lockscreen currently does not accept any input if a smartcard (in
this case a YubiKey) is used for logging in.
Similar to the initial login, the password field does not accept any input.
However, it does not recover after resetting the prompt (via Escape).
Disconnecting the smartcard causes the fallback to the regular password
login flow, and makes the password field work again.
[What I expected]
The lockscreen should allow PIN input, just as the login screen does (or
ideally, even without having to reset once at the start).
[More info]
I am running the resolute cloud-image, which I installed gnome-core on.
Some configs:
- GDM:
```
$ sudo gdm-config show
GDM Authorization configuration
Password authentication: Enabled
Fingerprint authentication: Disabled
Smart Card authentication: Enabled
Smart Card removal action: none
```
- SSSD:
```
[sssd]
debug_level = 9
domains = local
certificate_verification = no_verification
[pam]
pam_cert_auth = true
[domain/local]
auth_provider = none
id_provider = proxy
local_auth_policy = only
proxy_lib_name = files
# from conf.d/local_users.conf
[certmap/local/test]
matchrule = <SUBJECT>^CN=test,O=B1$
[certmap/local/tux]
matchrule = <SUBJECT>^CN=tux,O=B1$
```
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: gnome-shell 50.1-0ubuntu1.1
ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
CloudBuildName: server
CloudSerial: 20260717
CurrentDesktop: GNOME
Date: Thu Jul 23 16:08:26 2026
DisplayManager: gdm3
ProcEnviron:
LANG=C.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
RelatedPackageVersions: mutter-common 50.1-0ubuntu2.2
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug cloud-image resolute wayland-session
** Attachment added: "Video demonstration of initial login and lockscreen"
https://bugs.launchpad.net/bugs/2161662/+attachment/5985869/+files/demo.mp4
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https://bugs.launchpad.net/bugs/2161662
Title:
smartcard auth breaks lockscreen
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