** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1686448
Title:
Unable to reach higher than package C2 state with Skylake processor
Status in linux package in Ubuntu:
Confirmed
Bug description:
Hello
I have a Lenovo Ideapad 310 with a Intel Core i3-6100U. I have noticed
its battery last less time on Xubuntu 16.04 than on Windows 10. I have
searched on internet what could cause it, and found with powertop it
can't reach states higher than package C state 2, while it could reach
package C state 10.
On this particular notebook model, I would expect the battery would
last a bit more than 5 hours using only browser, as it happens with
Windows 10 and CentOS 7. On Xubuntu, battery lasts slightly more than
4 hours. The best was 4h30min, so I am having at least 30 minutes less
battery time, but generally it is one hour.
I have tried to get support on Ubuntu Forums, here is the link of the thread:
https://ubuntuforums.org/showthread.php?t=2357271
As everything we tried had no success, I am making this report.
As a reference, CentOS 7 functioned correctly and the battery lasted
the same time than Windows 10, while Fedora 25 has this problem too.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-generic 4.4.0.75.81
ProcVersionSignature: Ubuntu 4.4.0-75.96-generic 4.4.59
Uname: Linux 4.4.0-75-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: usuario 4786 F.... pulseaudio
CurrentDesktop: XFCE
Date: Wed Apr 26 12:39:30 2017
HibernationDevice: RESUME=UUID=9f36068f-c6d6-4fd6-87d5-46f1f5247563
InstallationDate: Installed on 2016-12-31 (116 days ago)
InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
MachineType: LENOVO 80UG
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-75-generic.efi.signed
root=UUID=0fbb0f28-6764-4447-a890-dc966d1f8adf ro quiet
RelatedPackageVersions:
linux-restricted-modules-4.4.0-75-generic N/A
linux-backports-modules-4.4.0-75-generic N/A
linux-firmware 1.157.8
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/10/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: 0XCN39WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Toronto 4A2
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40679 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad 310-14ISK
dmi.modalias:
dmi:bvnLENOVO:bvr0XCN39WW:bd01/10/2017:svnLENOVO:pn80UG:pvrLenovoideapad310-14ISK:rvnLENOVO:rnToronto4A2:rvrSDK0J40679WIN:cvnLENOVO:ct10:cvrLenovoideapad310-14ISK:
dmi.product.name: 80UG
dmi.product.version: Lenovo ideapad 310-14ISK
dmi.sys.vendor: LENOVO
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