~$ sudo powertop (Idle Stats tab)
Package | Core | CPU 0 CPU 4
POLL 0.0% | POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
C1 0.8% | C1 0.3% | C1 0.3% 0.2 ms 0.4%
0.6 ms
C2 12.7% | C2 7.2% | C2 10.4% 1.6 ms 4.0%
4.1 ms
C3 81.7% | C3 89.4% | C3 84.6% 6.6 ms 94.0%
8.9 ms
| Core | CPU 1 CPU 5
| POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
| C1 1.7% | C1 3.3% 0.9 ms 0.1%
0.2 ms
| C2 15.7% | C2 26.0% 1.8 ms 5.4%
2.0 ms
| C3 74.0% | C3 65.5% 4.0 ms 82.4%
25.2 ms
| Core | CPU 2 CPU 6
| POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
| C1 0.7% | C1 1.1% 0.2 ms 0.2%
0.2 ms
| C2 15.0% | C2 17.2% 2.3 ms 12.7%
1.1 ms
| C3 81.0% | C3 78.7% 5.4 ms 83.2%
7.9 ms
| Core | CPU 3 CPU 7
| POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
| C1 0.4% | C1 0.8% 0.2 ms 0.1%
0.1 ms
| C2 12.6% | C2 23.6% 1.3 ms 1.7%
1.6 ms
| C3 81.8% | C3 69.1% 4.7 ms 94.5%
9.4 ms
--
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:
Confirmed
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.
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