Public bug reported:
I was running ubuntu 17.10 for months with no issues. After upgrading to 18.04,
closing the lid regularly (but not always) results in either:
1. The display staying on with a frozen lock-screen, or
2. The display powered off, but the notebook still powered on.
In both cases the notebook does not respond. A five-second press of the
power button to hard-reboot the computer is the only means of recovery.
After powering the notebook back on, there are no files in /var/crash.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-22-generic 4.15.0-22.24
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Jun 9 00:00:48 2018
InstallationDate: Installed on 2018-06-02 (6 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1775945
Title:
Lenovi X1 Carbon regularly has frozen lock- or dark screen after
closing lid
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