Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.11 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/v4.11-rc8 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1686448 Title: Unable to reach higher than package C2 state with Skylake processor Status in linux package in Ubuntu: Incomplete 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686448/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
