Laptop freezes on reboot or shutdown

[Matvey Teplov]

HP Elitebook system freezes with the blank black screen. No reaction on keys and only can be solved with the forced power off via a long press of the power button (30 sec). Turning ACPI off for grub solves the issue, but then the system runs on a single thread. Attempting to turn off via BIOS results in a consistent crash. Not helping either if attempting via PCI.

Description: Ubuntu 20.04.3 LTS
Release: 20.04

acpi:
  Installed: (none)
  Candidate: 1.7-1.1
  Version table:
     1.7-1.1 500
        500 http://nl.archive.ubuntu.com/ubuntu focal/universe amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: acpid 1:2.0.32-1ubuntu1
ProcVersionSignature: Ubuntu 5.13.0-28.31~20.04.1-generic 5.13.19
Uname: Linux 5.13.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Feb 3 18:28:33 2022
ExecutablePath: /usr/sbin/acpid
InstallationDate: Installed on 2022-02-01 (2 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
SourcePackage: acpid
UpgradeStatus: No upgrade log present (probably fresh install)