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[Bug 2121017] Re: Gdm3 doesn't start [unix_chkpwd: could not obtain user info (gdm-greeter)]

To: debcrafters-packages@xxxxxxxxxxxxxxxxxxx
From: Fred <2121017@xxxxxxxxxxxxxxxxxx>
Date: Fri, 22 Aug 2025 11:49:58 -0000
Reply-to: Bug 2121017 <2121017@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx

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.

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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)

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