Description:
With updates from 12th September, 2016 after two week holiday my Active Directory integration is broken.

I could not login via graphical login any more and when logging in via the terminal, the prompt showed

[I have no name!@my-box]

id $username did show all groups and correct ids but couldn’t map ids to user and group names.
Also ls -al in my home dir only showed ids instead of user and group names as owner information.

As far as I can tell, the config files (krb5.conf, smb.conf, etc.) haven’t changed and neither have the Active Directory settings.

In /var/log/samba/log.winbindd-idmap I see messages like this:

[2016/09/15 16:07:24.411226, 3] ../source3/winbindd/idmap_rid.c:146(idmap_rid_unixids_to_sids)
Unexpected error resolving an ID (16208)

Running wbinfo -g or wbinfo -u works as expected and shows all the correct group and user names.
So do getent group, getent passwd, net ads info and net ads lookup.

Additional info:

Steps to reproduce:

  1. Follow: https://wiki.archlinux.org/index.php/Active_Directory_Integration
  2. Install latest updates up to 14th September, 2016
  3. Try to login as Domain user