Oh, you are quite right... It's even identified in the project scope of the
original proposal to switch from KDM: "Fix the bugs affecting log in: PAM
stack integration and LDAP user lists"  --

I'm just going to switch back to KDM...   Should solve my problem.

Thank you!

On Tue, Mar 14, 2017 at 12:46 PM, Alexander Bokovoy <aboko...@redhat.com>

> On ti, 14 maalis 2017, Tyrell Jentink wrote:
>> I have users in an AD Domain, my FreeIPA server is set up with an
>> interforest trust, and users can log in using SSH or virtual terminals on
>> any system joined to the IPA domain, and I have Samba authenticating
>> against these users on another server... Things are good...
>> Until I try logging in to the Fedora 25 KDE Respin from the desktop
>> manager
>> (SDDM), in which case it goes to a black screen, with an X as a cursor,
>> but
>> nothing else... This is my first attempt at logging a remote user in
>> through the GUI, and KDE/SDDM is the default configuration on Fedora KDE
>> Respin, thus the combination in question... I haven't tried anything else.
>> Some diagnostics I have tried:
>> If I log in to a virtual terminal and run startx, then I get KDE,
>> regardless of the user.
>> If I log in to SDDM/KDE using a local user, then I get KDE.
>> If I log in to SDDM/KDE using an IPA user, I get the black screen...
>>   But, the audit and security logs show that the user successfully
>> authenticated. Dmesg shows the user getting authenticated successfully and
>> user contexts changing successfully.
>> So, I'm left assuming this is a problem with SDDM somewhere, but only with
>> remote users... And my logs aren't giving me any hints.
>> Any ideas? Any logs in particular that I should be looking at?
> "Black screen" with SDDM is a fairly known issue -- you can look at
> https://bugzilla.redhat.com/show_bug.cgi?id=1350107, for example. Or
> https://github.com/sddm/sddm/issues/756, or many other distros. It looks
> like SDDM is crashing internally on many conditions. The bug in Red Hat
> bugzilla has at least three different cases where SDDM crashes.
> I'd suggest you to file a bug and attach system logs to it. You can use
> SSSD troubleshooting guide to create SSSD debug logs (domain, pam, nss,
> and selinux sections at least) but also attach logs for sddm and audit.
> --
> / Alexander Bokovoy

Tyrell Jentink
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