Ubuntu 22.04 LTS GDM Login Loop on Desktop Systems

📖 ~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

After entering credentials, screen flashes and returns to GDM login repeatedly.

Environment & Reproduction

Seen on Ubuntu 22.04 LTS GNOME desktops after graphics updates or home permission changes.

Root Cause Analysis

Corrupt session config, wrong ownership in home directory, or graphics stack mismatch blocks session startup.

Quick Triage

Switch to TTY and verify free disk space and user directory ownership.

Step-by-Step Diagnosis

Review GDM and user session logs for immediate logout triggers.

Solution – Primary Fix

Correct home ownership, reset problematic GNOME session files, and restart gdm3.

Solution – Alternative Approaches

Select Xorg session at login if Wayland/GPU path is unstable on current driver.

Verification & Acceptance Criteria

User reaches desktop successfully and can log out/in repeatedly without loop.

Rollback Plan

Restore prior session files from backup if desktop settings regress.

Prevention & Hardening

Keep graphics drivers aligned with Ubuntu 22.04 repositories and avoid manual mixed stacks.

Related Errors & Cross-Refs

Connected with NVIDIA black-screen and disk-full profile write failures.

Related tutorial: View the step-by-step tutorial for Ubuntu 22.04 LTS.

View all Ubuntu 22.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Review GNOME, gdm3, and Ubuntu desktop troubleshooting docs.