update-initramfs fails: /usr/share/initramfs-tools/hooks/fuse failed with return 1.

[Aleksey Volkov]

The system is not fully updated and gives the following error
Setting up initramfs-tools (0.136ubuntu6.7) ...
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.136ubuntu6.7) ...
update-initramfs: Generating /boot/initrd.img-5.4.0-162-generic

E: /usr/share/initramfs-tools/hooks/fuse failed with return 1.
update-initramfs: failed for /boot/initrd.img-5.4.0-162-generic with 1.
dpkg: error processing package initramfs-tools (--configure):
 installed initramfs-tools package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 initramfs-tools

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: initramfs-tools 0.136ubuntu6.7
ProcVersionSignature: Ubuntu 5.4.0-162.179-generic 5.4.246
Uname: Linux 5.4.0-162-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Sep 13 19:39:18 2023
ErrorMessage: installed initramfs-tools package post-installation script subprocess returned error exit status 1
PackageArchitecture: all
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python3.8, Python 3.8.10, python-is-python3, 3.8.2-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3.2
 apt 2.0.9
SourcePackage: initramfs-tools
Title: package initramfs-tools 0.136ubuntu6.7 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to focal on 2023-09-13 (0 days ago)

[Benjamin Drung (bdrung)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The relevant dpkg terminal log says:

E: /usr/share/initramfs-tools/hooks/fuse failed with return 1.

Sadly there is no error message explaining the exit code 1. Can you edit /usr/share/initramfs-tools/hooks/fuse and add "set -x" (without the quotes) to the script and then run update-initramfs to get more log output?

sudo nano /usr/share/initramfs-tools/hooks/fuse
sudo update-initramfs -u

Please attach the output to the bug report then.

[Matthew H McKenzie (f-launchpad-swellhunter-org)]

Possibly related to DEBIAN Bug#1022252.

[Matthew H McKenzie (f-launchpad-swellhunter-org)]

There is a workaround described at
https://groups.google.com/g/linux.debian.bugs.dist/c/g1OZeZ_wWAU/m/eE0XZBWoBgAJ

copy_exec /sbin/mount.fuse3 /sbin || true

However the upstream maintainer should probably address this.

Affects the AWS Focal AMI, so a lot of people may be impacted but just not know.

[Benjamin Drung (bdrung)]

There might be multiple reasons for the bash script to exit with code 1.

The package fuse3 ships both files: /usr/share/initramfs-tools/hooks/fuse and /sbin/mount.fuse3. So /sbin/mount.fuse3 should be present.

[Benjamin Drung (bdrung)]

Re-assigning from initramfs-tools to fuse3.

[Launchpad Janitor (janitor)]

[Expired for fuse3 (Ubuntu) because there has been no activity for 60 days.]