π ~1 min read
Table of contents
Symptom & Impact
GUI login fails with black screen, interrupting workstation access.
Environment & Reproduction
Occurs after incompatible NVIDIA driver updates.
sudo apt install nvidia-driver-550
Root Cause Analysis
Kernel module and userspace driver mismatch prevents graphics stack initialization.
Quick Triage
Switch to a text console and inspect GPU and display manager logs.
Ctrl+Alt+F3
journalctl -b -p err | grep -Ei 'nvidia|gdm|xorg'
Step-by-Step Diagnosis
Check loaded modules, driver package state, and secure boot status.
lsmod | grep nvidia
ubuntu-drivers devices
mokutil --sb-state

Solution – Primary Fix
Purge broken NVIDIA packages, reinstall recommended driver, and reboot.
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sudo apt purge '^nvidia-.*'
sudo ubuntu-drivers autoinstall
sudo reboot

Solution – Alternative Approaches
Temporarily force nouveau for access while scheduling proper driver remediation.
sudo apt install xserver-xorg-video-nouveau
Verification & Acceptance Criteria
Graphical login works and nvidia-smi returns expected GPU status.
nvidia-smi
systemctl status gdm3
Rollback Plan
Revert to previously validated driver version using apt package history.
grep ' install ' /var/log/apt/history.log | grep nvidia | tail -n 5
Prevention & Hardening
Pin tested driver versions and coordinate updates with kernel change windows.
Related Errors & Cross-Refs
Can coincide with Wayland disablement and secure boot module-signing failures.
Related tutorial: View the step-by-step tutorial for Ubuntu 24.04 LTS.
View all Ubuntu 24.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Ubuntu NVIDIA driver management and desktop troubleshooting references.
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