Ubuntu 22.04 LTS – Intel Wi-Fi repeatedly disconnects under load – 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

Wi-Fi disconnects during transfers or video calls, causing dropped sessions and intermittent application failures.

Environment & Reproduction

Common on laptops using iwlwifi with aggressive power saving defaults.

Root Cause Analysis

Driver power-save, firmware behavior, or AP compatibility issues can cause periodic link resets under sustained throughput.

Quick Triage

Confirm firmware and kernel module messages around disconnect events.

Step-by-Step Diagnosis

Correlate drop timestamps with driver logs and power settings.

Solution – Primary Fix

Disable problematic Wi-Fi power saving for the connection and reload networking stack.

Solution – Alternative Approaches

Update linux-firmware and test newer HWE kernel if chipset bug is fixed upstream.

Verification & Acceptance Criteria

Long transfer tests complete without disconnects and packet loss remains within baseline.

Rollback Plan

Remove custom NetworkManager override and restart service to return default power behavior.

Prevention & Hardening

Keep firmware current and standardize AP channel settings for corporate wireless fleets.

Related Errors & Cross-Refs

Can overlap with DNS timeout symptoms and VPN reconnect loops after link drops.

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

Ubuntu wireless troubleshooting and Intel iwlwifi guidance.