Light DM schließt plötzlich die Session

zypper se -s xdm
Repository-Daten werden geladen...
Installierte Pakete werden gelesen...

S  | Name                 | Type  | Version        | Arch   | Repository
---+----------------------+-------+----------------+--------+-----------
i+ | libXdmcp-devel       | Paket | 1.1.2-1.23     | x86_64 | OSS
   | libXdmcp-devel-32bit | Paket | 1.1.2-1.23     | x86_64 | OSS
i  | libXdmcp6            | Paket | 1.1.2-1.23     | x86_64 | OSS
   | libXdmcp6-32bit      | Paket | 1.1.2-1.23     | x86_64 | OSS
   | remmina-plugin-xdmcp | Paket | 1.4.8-1.81     | x86_64 | OSS
i+ | xdm                  | Paket | 1.1.11-13.9.1  | x86_64 | OSS
i+ | xdm-xsession         | Paket | 1.1.11-13.9.1  | x86_64 | OSS
i  | xdmbgrd              | Paket | 0.6-1.34       | x86_64 | OSS
   | xdmsc                | Paket | 0.6-bp153.1.15 | noarch | OSS

tuxracer@ubuntu:~$ systemctl status display-manager.service
● lightdm.service - Light Display Manager
     Loaded: loaded (/lib/systemd/system/lightdm.service; indirect; vendor preset: enabled)
     Active: active (running) since Tue 2021-11-30 06:52:28 CET; 10h ago
       Docs: man:lightdm(1)
    Process: 1332 ExecStartPre=/bin/sh -c [ "$(basename $(cat /etc/X11/default-display-manager 2>/dev/null))" = "lightdm" ]>
   Main PID: 1343 (lightdm)
      Tasks: 21 (limit: 6921)
     Memory: 83.9M
     CGroup: /system.slice/lightdm.service
             ├─1343 /usr/sbin/lightdm
             └─1390 /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch

Nov 30 06:52:31 ubuntu lightdm[1721]: PAM unable to dlopen(pam_kwallet.so): /lib/security/pam_kwallet.so: cannot open share>
Nov 30 06:52:31 ubuntu lightdm[1721]: PAM adding faulty module: pam_kwallet.so
Nov 30 06:52:31 ubuntu lightdm[1721]: pam_succeed_if(lightdm:auth): requirement "user ingroup nopasswdlogin" not met by use>
Nov 30 06:52:46 ubuntu lightdm[1721]: gkr-pam: unable to locate daemon control file
Nov 30 06:52:46 ubuntu lightdm[1721]: gkr-pam: stashed password to try later in open session
Nov 30 06:52:46 ubuntu lightdm[1721]: pam_kwallet5(lightdm:auth): (null): pam_sm_authenticate
Nov 30 06:52:46 ubuntu lightdm[1721]: pam_kwallet5(lightdm:setcred): pam_kwallet5: pam_sm_setcred
Nov 30 06:52:46 ubuntu lightdm[1721]: pam_unix(lightdm:session): session opened for user tuxracer by (uid=0)
Nov 30 06:52:47 ubuntu lightdm[1721]: gkr-pam: gnome-keyring-daemon started properly and unlocked keyring
Nov 30 06:52:47 ubuntu lightdm[1721]: pam_kwallet5(lightdm:session): pam_kwallet5: pam_sm_open_session