Public bug reported:
Booted the Dell 5520 with Xubuntu 18.04 Live USB boot disk. A full
battery shows about 12 hours remaining operating time.
Booting with updated Xubuntu 18.04 CPU clock seems to be fixed to
2.32GHz, Battery life 4 hours.
1.
lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04
2.
Package name for meeting low power mode is unknown to me. (part of the kernel)
3.
When using the Dell precision 5520 in battery mode, I expect more then 10 hours
battery life time.
4.
Instead the Battery is flat after 4 hours.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.25
ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
Uname: Linux 4.15.0-34-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Tue Sep 25 10:11:24 2018
InstallationDate: Installed on 2018-07-16 (70 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.update-manager.release-upgrades: 2018-07-16T14:01:08.890425
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic dist-upgrade
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https://bugs.launchpad.net/bugs/1794254
Title:
Dell Precision 5520 in Battery mode stopped Low Power modes. No CPU
speed stepping.
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