Ubuntu 26.04 LTS – NVIDIA driver fails after kernel update with DKMS build error – 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

Graphical login may fail or GPU compute workloads stop after kernel update.

Environment & Reproduction

Occurs when required build headers are missing or DKMS compile fails for new ABI.

uname -r
nvidia-smi

Root Cause Analysis

Driver module was not successfully rebuilt for the running kernel.

Quick Triage

Check dkms status, build logs, and loaded kernel modules.

dkms status
lsmod | grep -E 'nvidia|nouveau'
journalctl -k -n 120 --no-pager

Step-by-Step Diagnosis

Review DKMS make.log to identify missing headers or compile incompatibility.

sudo find /var/lib/dkms -name make.log -print
sudo sed -n '1,220p' /var/lib/dkms/nvidia/*/build/make.log

Solution – Primary Fix

Install matching headers, reinstall driver package, and rebuild initramfs.

sudo apt install -y linux-headers-$(uname -r) build-essential
sudo ubuntu-drivers autoinstall
sudo update-initramfs -u
sudo reboot

Solution – Alternative Approaches

Temporarily boot previous kernel from GRUB to restore service while remediating.

grep 'menuentry ' /boot/grub/grub.cfg | head -n 10

Verification & Acceptance Criteria

nvidia-smi works and kernel module matches running kernel version.

nvidia-smi
modinfo nvidia | grep vermagic

Rollback Plan

Purge new driver series and reinstall known stable package set.

sudo apt purge -y '^nvidia-.*'
sudo apt install -y nvidia-driver-

Prevention & Hardening

Stage kernel and GPU driver updates together in pre-production validation cycles.

Related Errors & Cross-Refs

Closely linked to Secure Boot signing failures and nouveau conflicts.

Related tutorial: View the step-by-step tutorial for Ubuntu 26.04 LTS.

View all Ubuntu 26.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Ubuntu NVIDIA driver and DKMS operational guidance.