Ubuntu 20.04 Black Screen After Login With NVIDIA

📖 ~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

Successful authentication leads to black screen instead of desktop.

Environment & Reproduction

Cursor only, blank display, or return to login loop.

Root Cause Analysis

NVIDIA GPU systems after driver, kernel, or display stack updates.

Quick Triage

Driver mismatch with kernel modules or Wayland/Xorg session conflicts.

Step-by-Step Diagnosis

Check gdm logs, verify loaded NVIDIA module, and inspect Xorg errors.

Solution – Primary Fix

Reinstall recommended nvidia-driver package, rebuild initramfs, and force Xorg if needed.

Solution – Alternative Approaches

Graphical session launches and nvidia-smi reports active driver correctly.

Verification & Acceptance Criteria

Use Ubuntu recommended driver channel and avoid mixed installer methods.

Rollback Plan

Escalate if hardware faults or persistent GPU hangs are suspected.

Prevention & Hardening

Boot recovery, purge NVIDIA stack, and temporarily switch to nouveau driver.

Related Errors & Cross-Refs

Ubuntu NVIDIA driver docs and display manager troubleshooting references.

Related tutorial: View the step-by-step tutorial for Ubuntu 20.04 LTS.

View all Ubuntu 20.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Mixing vendor runfile installer with apt packages often causes module conflicts.