Affected versions: Debian 13 Debian 13 (Trixie) Debian 13.x

πŸ“– ~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

System upgrades stop with unresolved dependencies, leaving patch cycles incomplete.

Environment & Reproduction

Typical on hosts with package holds, mixed repositories, or pin conflicts.

Root Cause Analysis

Held packages and incompatible candidate versions prevent apt from finding a consistent solution.

Quick Triage

Check holds, broken packages, and source list consistency.

Step-by-Step Diagnosis

Run resolver debug simulation to identify exact package conflicts.

Illustrative mockup for debian-13 β€” terminal_or_console
Diagnosis commands for post 154 β€” Illustrative mockup β€” Progressive Robot

Solution – Primary Fix

Clear unnecessary holds, repair package state, then execute upgrade.

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Illustrative mockup for debian-13 β€” log_or_dashboard
Fix validation evidence for post 154 β€” Illustrative mockup β€” Progressive Robot

Solution – Alternative Approaches

Disable third-party sources temporarily and retest with official Debian archives only.

Verification & Acceptance Criteria

dist-upgrade simulation and execution complete without broken/held package errors.

Rollback Plan

Restore prior apt source and pin files if dependency behavior regresses.

Prevention & Hardening

Enforce package governance and repository change control before maintenance windows.

Related errors include unmet dependencies, package kept back, and no installation candidate.

Related tutorial: View the step-by-step tutorial for Debian 13.

View all Debian 13 tutorials on the Tutorials Hub β†’

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Debian apt resolver and pinning documentation.

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