Wi-Fi Missing After Resume on Ubuntu 24.04 LTS

📖 ~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

Wireless adapter disappears after suspend and no networks are listed.

Environment & Reproduction

Seen on laptops after closing lid or using systemctl suspend.

Root Cause Analysis

Driver power-management state fails to restore during resume.

Quick Triage

Run nmcli device status and rfkill list to confirm blocked or missing device state.

Step-by-Step Diagnosis

Check kernel messages via journalctl -k -b | grep -i -E ‘wifi|wlan|firmware|iwlwifi|mt76’.

Solution – Primary Fix

Reload module with sudo modprobe -r iwlwifi && sudo modprobe iwlwifi, then restart NetworkManager using sudo systemctl restart NetworkManager.

Solution – Alternative Approaches

Disable aggressive power saving in NetworkManager Wi-Fi settings.

Verification & Acceptance Criteria

Adapter remains present across two suspend/resume cycles and reconnects automatically.

Rollback Plan

Revert custom module options in /etc/modprobe.d if connectivity worsens.

Prevention & Hardening

Keep linux-firmware and kernel updates current through Ubuntu updates.

Related Errors & Cross-Refs

Related: firmware load failures and ‘No Wi-Fi Adapter Found’.

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

NetworkManager docs and Ubuntu wireless troubleshooting.