This issue resolved after I changed my /etc/nsswitch.conf with the one mentioned above by Daniel.
The difference between my config file and Daniel's above is that mine had "compat" instead of "files" and that mine lacked the "gshadow" entry. Also my "hosts" entry was slightly different. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apparmor in Ubuntu. https://bugs.launchpad.net/bugs/2121017 Title: Gdm3 doesn't start [unix_chkpwd: could not obtain user info (gdm- greeter)] Status in apparmor package in Ubuntu: Confirmed Status in gdm3 package in Ubuntu: Confirmed Status in gnome-session package in Ubuntu: Confirmed Status in pam package in Ubuntu: Confirmed Bug description: My system: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Questing Quokka (development branch) Release: 25.10 Codename: questing Completely updated. After yesterday (2025-08-19) package updates, gdm3 stops on starting Ubuntu and It's impossible to start Gnome. Gdm3 freezes computer. On restarting computer, I see a lot of dmesg messages: nouveau cannot find any crtc or sizes I've blacklisted nouveau driver and installed several nvidia drivers and nothing works. My nvidia is: # nvidia-driver-assistant Detected GPUs: NVIDIA GeForce RTX 4070 Laptop GPU - (pci_id 0x2860) Detected system: Ubuntu 25.10 Only works to install lightdm. ProblemType: Bug DistroRelease: Ubuntu 25.10 Package: gdm3 49~beta-0ubuntu2 ProcVersionSignature: Ubuntu 6.16.0-13.13-generic 6.16.0 Uname: Linux 6.16.0-13-generic x86_64 ApportVersion: 2.33.1-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Wed Aug 20 08:23:58 2025 InstallationDate: Installed on 2023-06-17 (795 days ago) InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1) SourcePackage: gdm3 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2121017/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
