Public bug reported:
Environment
- Ubuntu Server 24.04.4 LTS (Noble)
- Package: bolt 0.9.7-1
- Intel Alder Lake-P Thunderbolt 4 controller
- Beelink EQi12 Pro (BIOS EQI12D405)
Problem
bolt.service always fails immediately after boot.
The journal consistently reports:
bolt 0.9.7 starting up.
manager: initializing store
store: located at: /var/lib/boltd
could not create manager: failed to parse '' as unsigned integer
The service then exits with:
status=5/TRAP
Observations
- Thunderbolt hardware is correctly detected by the kernel.
- The thunderbolt kernel driver is loaded.
- Two Thunderbolt/USB4 domains are present.
- /var/lib/boltd/version exists but is an empty (0-byte) file.
- No Thunderbolt devices are attached.
Additional information
While investigating, I noticed that the upstream changelog for bolt
0.9.10 mentions:
"Fix bolt exits when opening an empty version file"
This appears to be closely related to the behaviour observed on Ubuntu
24.04 with bolt 0.9.7, although I cannot confirm that it is the same
root cause.
Expected behaviour
bolt.service should start successfully even when no Thunderbolt devices
are connected.
Actual behaviour
bolt.service crashes immediately during startup and systemd repeatedly
attempts to restart it.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: bolt 0.9.7-1
ProcVersionSignature: Ubuntu 7.0.0-28.28~24.04.1-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.28.2-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Jul 25 14:27:11 2026
InstallationDate: Installed on 2026-04-01 (115 days ago)
InstallationMedia: Ubuntu 24.04.3 2026.03.24 LTS "Custom Noble Numbat"
(20260324)
SourcePackage: bolt
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: bolt (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2161788
Title:
bolt 0.9.7 crashes on startup with "failed to parse '' as unsigned
integer"
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