This bug was fixed in the package lightdm - 1.30.0-0ubuntu4.21.10.1
--------------- lightdm (1.30.0-0ubuntu4.21.10.1) impish; urgency=medium
* debian/lightdm.lightdm-greeter.pam, debian/lightdm.pam: - Suppress log error for missing pam modules (LP: #1949970)
-- Dan Streetman <email address hidden> Fri, 05 Nov 2021 10:18:32 -0400
This bug was fixed in the package lightdm - 1.30.0- 0ubuntu4. 21.10.1
--------------- 0ubuntu4. 21.10.1) impish; urgency=medium
lightdm (1.30.0-
* debian/ lightdm. lightdm- greeter. pam, lightdm. pam:
debian/
- Suppress log error for missing pam modules (LP: #1949970)
-- Dan Streetman <email address hidden> Fri, 05 Nov 2021 10:18:32 -0400