Ubuntu 24.04 LTS – GNOME login loop on Wayland or Xorg – Fix & Prevention

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

User returns to login screen immediately after authentication.

Environment & Reproduction

Happens after graphics stack changes or corrupted profile files.

systemctl status gdm3
loginctl list-sessions
journalctl -u gdm3 -n 100 --no-pager

Root Cause Analysis

Broken session files, permission errors in home, or graphics backend mismatch.

Quick Triage

Check ownership and display-related errors.

ls -ld $HOME
ls -la $HOME | grep -E 'Xauthority|xsession|ICEauthority'
journalctl -b -p err --no-pager | grep -Ei 'gdm|gnome-shell|wayland|xorg'

Step-by-Step Diagnosis

Validate writable home and isolate problematic startup configs.

touch $HOME/.login-test
rm -f $HOME/.login-test
stat -c '%U:%G %a' $HOME

Solution – Primary Fix

Reset stale session cache and restart display manager.

mv $HOME/.Xauthority $HOME/.Xauthority.bak.$(date +%s) 2>/dev/null || true
mv $HOME/.ICEauthority $HOME/.ICEauthority.bak.$(date +%s) 2>/dev/null || true
sudo chown -R $USER:$USER $HOME
sudo systemctl restart gdm3

Solution – Alternative Approaches

Switch session type at login to isolate Wayland/Xorg issues.

grep -E 'WaylandEnable' /etc/gdm3/custom.conf
sudoedit /etc/gdm3/custom.conf
sudo systemctl restart gdm3

Verification & Acceptance Criteria

User session starts and remains stable for repeated logins.

loginctl session-status
journalctl -u gdm3 -n 40 --no-pager

Rollback Plan

Restore backed-up authority files if custom tooling depends on them.

ls -la $HOME/.Xauthority.bak.*
ls -la $HOME/.ICEauthority.bak.*

Prevention & Hardening

Avoid running desktop config tools as root in user home directories.

find $HOME -maxdepth 1 -user root -ls
chown -R $USER:$USER $HOME

Related Errors & Cross-Refs

Commonly appears after GPU driver or display manager updates.

Related tutorial: View the step-by-step tutorial for Ubuntu 24.04 LTS.

View all Ubuntu 24.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Ubuntu GNOME session troubleshooting and GDM configuration docs.