🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026
Affected versions: FreeBSD 12

📖 ~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

bhyve guest creation succeeds but boot fails immediately when required UEFI firmware files are unavailable.

Environment & Reproduction

VM start scripts return firmware open errors on systems recently migrated or rebuilt from minimal images.

Root Cause Analysis

Missing bhyve-firmware package, incorrect firmware path, or mismatched vm-bhyve template settings are typical causes.

Quick Triage

Check pkg info bhyve-firmware, list /usr/local/share/uefi-firmware, and verify vm launch script arguments.

Step-by-Step Diagnosis

Confirm firmware file presence and permissions, then compare expected loader path to configured VM profile. image_ref=0

Illustrative mockup for freebsd-12 — terminal_or_shell
Launching bhyve and validating VM boot parameters — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Install or reinstall bhyve-firmware, update VM profile with correct firmware file, and retry VM boot sequence. image_ref=1

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Illustrative mockup for freebsd-12 — log_or_config
Inspecting bhyve scripts and firmware file paths — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Use legacy boot mode only for supported guests when UEFI is unnecessary and operational constraints permit.

Verification & Acceptance Criteria

Guest reaches expected bootloader or OS installer screen and remains stable through multiple reboots.

Rollback Plan

Restore prior VM templates and firmware package version if newly introduced files produce boot regressions.

Prevention & Hardening

Pin tested vm-bhyve templates and validate firmware availability during host provisioning automation.

Can appear alongside tap interface setup issues and stale bhyve PID file conflicts after failed starts.

Related tutorial: View the step-by-step tutorial for freebsd-12.

View all freebsd-12 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Consult man bhyve, vm-bhyve documentation, and FreeBSD virtualization handbook sections.

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