As per jacob's comment have added the tag and changed to Confirmed,
Joseph do you know how this bug should be progressed? Where it should be
forwarded upstream or what further debug work could be done? A test
against a yet newer kernel probably wouldn't go amiss but not sure not
doing that should put the bug back to Incomplete since then we may
always be behind.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1767324
Title:
Extreme regression in battery autonomy with kernel 4.15
Status in linux package in Ubuntu:
Confirmed
Bug description:
Since upgrading to kernel 4.15, my laptop (HP Elitebook 850 G3) lasts
less than one hour on a fully charged battery. On Ubuntu 17.10 with
kernel 4.13, the autonomy was typically in excess of 5 hours.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-lowlatency 4.15.0.20.23
ProcVersionSignature: Ubuntu 4.15.0-20.21-lowlatency 4.15.17
Uname: Linux 4.15.0-20-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jzimm 3538 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 27 20:10:02 2018
InstallationDate: Installed on 2018-04-03 (24 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180402)
MachineType: HP HP EliteBook 850 G3
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/bionic/vmlinuz-4.15.0-20-lowlatency
root=UUID=b6480aee-7c63-4ce4-9e8d-cdbef768b982 ro
rootflags=subvol=@,relatime,autodefrag,space_cache quiet splash
module.sig_enforce=1 intel_pstate=skylake_hwp radeon.si_support=0
radeon.cik_support=0 amdgpu.si_support=1 amdgpu.cik_support=1 vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.15.0-20-lowlatency N/A
linux-backports-modules-4.15.0-20-lowlatency N/A
linux-firmware 1.173
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/31/2016
dmi.bios.vendor: HP
dmi.bios.version: N75 Ver. 01.10
dmi.board.name: 8079
dmi.board.vendor: HP
dmi.board.version: KBC Version 85.6F
dmi.chassis.asset.tag: 5CG6351LQL
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.modalias:
dmi:bvnHP:bvrN75Ver.01.10:bd07/31/2016:svnHP:pnHPEliteBook850G3:pvr:rvnHP:rn8079:rvrKBCVersion85.6F:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN G=N L=BUS B=HP S=ELI
dmi.product.name: HP EliteBook 850 G3
dmi.sys.vendor: HP
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