π ~1 min read
Table of contents
Symptom & Impact
dist-upgrade fails with held or broken package messages, blocking security and feature updates.
Environment & Reproduction
Often appears after mixed repositories, partial upgrades, or manually pinned packages.
Root Cause Analysis
Dependency resolver cannot satisfy version constraints for one or more required packages.
Quick Triage
List held packages, inspect dependency tree, and validate repository priority settings.
Step-by-Step Diagnosis
Run simulation mode and collect exact package conflict output for remediation.

Solution – Primary Fix
Release holds, repair package state, and retry dist-upgrade using supported repositories.
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Solution – Alternative Approaches
Disable conflicting third-party repositories temporarily to isolate dependency issues.
Verification & Acceptance Criteria
Upgrade simulation and execution complete with no held-broken dependency errors.
Rollback Plan
Reinstate previous repository and hold configuration if required to stabilize services.
Prevention & Hardening
Enforce repository governance and periodic dependency health checks before upgrades.
Related Errors & Cross-Refs
Related messages include unmet dependencies, kept back packages, and resolver failures.
Related tutorial: View the step-by-step tutorial for Ubuntu 14.04 LTS.
View all Ubuntu 14.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Consult Ubuntu packaging and apt dependency resolution guidance.
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