Ubuntu 24.04 LTS – snapd service fails and snap applications do not launch

📖 ~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

Snap packages fail to run or refresh, affecting user and admin tooling.

Environment & Reproduction

Often follows interrupted updates or snap mount/state corruption.

systemctl status snapd --no-pager
snap version || true

Root Cause Analysis

snapd unit failure can result from package damage, mount failures, or pending snap tasks.

Quick Triage

Inspect service failures and queue state before reinstalling.

sudo journalctl -u snapd -n 100 --no-pager
snap changes || true

Step-by-Step Diagnosis

Validate loop mounts and snap task details.

mount | grep snap || true
losetup -a | head

Solution – Primary Fix

Reinstall snapd, restart service, and refresh snaps.

sudo apt-get update
sudo apt-get install --reinstall -y snapd
sudo systemctl enable --now snapd
sudo snap refresh

Solution – Alternative Approaches

Use apt-packaged alternatives where snaps are non-essential.

apt-cache policy 

Verification & Acceptance Criteria

snap commands return healthy status and applications launch normally.

snap version
snap list
systemctl is-active snapd

Rollback Plan

Revert snapd changes by restoring snapshot or previous package state.

sudo apt-get install --reinstall -y snapd

Prevention & Hardening

Keep disk space available and avoid interrupting package transactions.

df -h
sudo apt-get autoremove -y

Related Errors & Cross-Refs

Related errors include cannot mount squashfs and snap task failed.

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

Ubuntu snap and snapd service troubleshooting documentation.