Public bug reported:
Regression: My laptop has become unable to enter S3 sleep/suspend.
(A.K.A. Suspend to RAM) It seems to go through all the motions,
including shutting down network interfaces and stopping the hard disk,
but fails at the last moment and immediately starts back up again,
showing the lock screen.
4.15.0-58-generic is affected.
4.15.0-55-generic is NOT affected.
In /var/log/syslog, it seems that the cause might be that a USB device
fails to suspend. (Log excerpt attached.)
There are no external USB devices connected when the bug occurs. There
are USB devices integral to the laptop and always present, none of which
are new or changed.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-generic-hwe-16.04 4.15.0.58.79
ProcVersionSignature: Ubuntu 4.15.0-58.64~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-58-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.19
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Aug 22 15:05:09 2019
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-09-16 (1069 days ago)
InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: linux-meta-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-meta-hwe (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
** Attachment added: "/var/log/syslog excerpt from unsuccessful suspend using
4.15.0-58-generic"
https://bugs.launchpad.net/bugs/1841070/+attachment/5284024/+files/unsuccessful-sleep_4.15.0-58-generic_syslog.txt
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https://bugs.launchpad.net/bugs/1841070
Title:
S3 sleep/suspend fails with Linux 4.15.0-58-generic
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