Decreased battery life after upgrade.

[Daniel Holm]

Hi,

In Ubuntu 15.04 I had around 7-8 hours of battery life but after upgrade I got half. Why? Maybe not the right package, but I don't know what else than the kernel. If wrong please change.

I use lmt for increased battery life, and it is still installed (even reinstalled and I also tried ltp instead, but no change).

Disabling intel p state turbo does no change. I dont really have any processes ruining it and it even says 4 hours after first boot.

The battery ost 5% just while I submitted this bug report.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-16-generic 4.2.0-16.19
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: daniel 3401 F.... pulseaudio
 /dev/snd/pcmC1D0p: daniel 3401 F...m pulseaudio
 /dev/snd/controlC1: daniel 3401 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Nov 6 16:46:52 2015
HibernationDevice: RESUME=UUID=45e6f377-dcab-4fc1-a57b-5b21563164a2
InstallationDate: Installed on 2014-11-02 (368 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: Sony Corporation SVP1321M2EB
ProcEnviron:
 LANGUAGE=sv
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=sv_SE.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-16-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-16-generic N/A
 linux-backports-modules-4.2.0-16-generic N/A
 linux-firmware 1.149.1
SourcePackage: linux
UpgradeStatus: Upgraded to wily on 2015-10-25 (11 days ago)
dmi.bios.date: 11/21/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: R1043V7
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR1043V7:bd11/21/2013:svnSonyCorporation:pnSVP1321M2EB:pvrC60C0754:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: SVP1321M2EB
dmi.product.version: C60C0754
dmi.sys.vendor: Sony Corporation

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.3 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-unstable/

[Daniel Holm (danielholm)]

Thank you, Joseph; I will give this a try.

[Daniel Holm (danielholm)]

Linux daniel-vaio 4.3.0-040300-generic #201511020846 SMP Mon Nov 2 13:48:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Just after login battery indicator states 2.2 hours left. Now it says around 3-4 hours, but the percentage is really rushing down towards 0%.

I will let it run for a while and see.

[Daniel Holm (danielholm)]

No change after using 4.3.

[Daniel Holm (danielholm)]

Why did I have excellent battery life before upgrade if the BIOS would be the issue?
I've been trying to upgrade the BIOS since I bought it, but I can't.

[Daniel Holm (danielholm)]

The battery does seem to still have more battery life than stated by the indicator and acpi command. Used for aroung five hours now and 23% left. Turbo turned off and powersave governor. Maybe the bug is in the reading?

But why is the turbo mode enabled and the cpu running on full speed as default?

Also I'm no longer able to play HD video. Connected?

[Daniel Holm (danielholm)]

I meant three hours. Trying to get FreeDOS onto a USB stick now.

[Daniel Holm (danielholm)]

Nope. I just can't install the BIOS update without Windows, but: I don't have Windows. Nor do I have a optic drive.

[Daniel Holm (danielholm)]

BIOS is now updated to.R1044V7.
I had to install Windows, then update BIOS. Now I have reinstalled Ubuntu 15.10 and the battery life is still around 3 hours.

[penalvch (penalvch)]

Daniel Holm, if you boot into a 3.19.x kernel is this still reproducible?

[Daniel Holm (danielholm)]

I'll give a llive CD a go in a few days and see. But I have to say that the battery life actually do seem rather persistant if I turn of turbo boost, enable all powertop tunes and run in powersave. Tough the battery still always say around three hours.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]