Public bug reported: Reproducer 1. Find a skylake machine. - in my case Lenovo x1 carbon gen 4. In my case with an NVME drive. 2. run powertop, and switch to idle stats tab 3. do nothing. *(as in let the machine idle till the cores regularly reach low power states. 4. Watch the watts fly. On my machine the package never gets into any power state other than PC2.
Expected results: PC3-PC10 power states should all show some usage. I also tried the mainline build of 4.6-rc7 with no benefits. Public conversations about the issue https://mjg59.dreamwidth.org/42156.html https://mjg59.dreamwidth.org/41713.html As far as I can tell having the nvme drive is part of the overall problem here. Please keep this case to skylake + nvme. Skylake + sata appears to have a number of fixes in the 4.6 and newer kernels that enable some of the higher sleep states, but I have not tested with a sata drive. Those fixes as of testing 4.6-rc7 do not resolve this issue with users who have nvme drives. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-22-generic 4.4.0-22.39 ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8 Uname: Linux 4.4.0-22-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chiluk 3139 F.... pulseaudio CurrentDesktop: Unity Date: Mon May 9 15:55:03 2016 HibernationDevice: RESUME=UUID=4f4ea88e-642e-4be5-bdf0-bbc7f47f5628 InstallationDate: Installed on 2016-04-25 (14 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 04f2:b531 Chicony Electronics Co., Ltd Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 20FBCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic.efi.signed root=UUID=249f91bb-7789-41cc-9cc0-8ba25d7f55bb ro quiet splash pcie_aspm=force vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-22-generic N/A linux-backports-modules-4.4.0-22-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/15/2016 dmi.bios.vendor: LENOVO dmi.bios.version: N1FET37W (1.11 ) dmi.board.asset.tag: Not Available dmi.board.name: 20FBCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1FET37W(1.11):bd03/15/2016:svnLENOVO:pn20FBCTO1WW:pvrThinkPadX1Carbon4th:rvnLENOVO:rn20FBCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20FBCTO1WW dmi.product.version: ThinkPad X1 Carbon 4th dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1579917 Title: Skylake processor with NVMe drive never reaches low power package states on X1 Carbon gen 4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1579917/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
