@Kai-Heng Feng, What are the odds of this backport patch being included with the next update from Canonical for 16.04. Since your recommended kernel is 4.4.0-68 do you think it will arrive as part of the regular release schedule? I can report if the patch worked when it arrives. As much as I love to support the work on these bugs, jumping kernels has left sour taste in my mouth. Switching between two kernels has sometimes created issues (bluetooth drivers not loading etc,.) that carry over into the previously stable kernel.
Mostly this is my production/work machine and I am resistant to messing with it too much. :( Sorry to sound like a poor sport. C -- 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/1672439 Title: No C-State Deeper than C3 utilized by Kaby Lake 7820HQ in Precision 5520 Status in linux package in Ubuntu: Incomplete Status in linux source package in Xenial: Incomplete Bug description: My processor does not appear to be utilizing and idling states deeper than C3. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-66-generic 4.4.0-66.87 ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44 Uname: Linux 4.4.0-66-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: carl 2446 F.... pulseaudio CurrentDesktop: Unity Date: Mon Mar 13 08:57:06 2017 DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-xenial-amd64-20160624-2 HibernationDevice: RESUME=UUID=65474558-ead3-4d66-85e5-b55f81978b88 InstallationDate: Installed on 2017-03-09 (3 days ago) InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47 IwConfig: lo no wireless extensions. wlp2s0 no wireless extensions. MachineType: Dell Inc. Precision 5520 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-66-generic.efi.signed root=UUID=d19efcb8-515b-494c-a236-ee0da23f2393 ro acpi_rev_override locale=C quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-66-generic N/A linux-backports-modules-4.4.0-66-generic N/A linux-firmware 1.157.8 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/18/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.1.3 dmi.board.name: 0X41RR dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.1.3:bd01/18/2017:svnDellInc.:pnPrecision5520:pvr:rvnDellInc.:rn0X41RR:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.name: Precision 5520 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1672439/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
