Re: x11/xdm with PAM and security/sssd2: not working

On Thu, Apr 23, 2026 at 11:18 PM Gleb Popov <[email protected]> wrote:
>
> I managed to reproduce the issue on 15.0-RELEASE and SSSD with the
> Active Directory backend.
> Unfortunately, debugging XDM is painful as it forks a lot, so I
> haven't been able to identify the root cause yet.
> I will hopefully take another stab on it next week.

As a data point, I managed to login as a domain user via x11/sddm.
I had to use security/pam_mkhomedir and the login didn't work for the
first time, but then it worked.
It seems that xdm is calling pam in some strange way that makes it
believe that authentication is failing.
I don't want to spend time debugging this ancient software, especially
when there is a working contemporary alternative.