Kernel 4.4.75 appears to have fixed the problem for C states.
Package | Core | CPU 0 CPU 4
POLL 0.1% | POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
C1E-SKL 1.4% | C1E-SKL 2.9% | C1E-SKL 3.5% 0.3 ms 2.3%
0.4 ms
C3-SKL 0.9% | C3-SKL 1.1% | C3-SKL 1.5% 0.2 ms 0.8%
0.2 ms
C6-SKL 8.4% | C6-SKL 12.6% | C6-SKL 19.0% 0.6 ms 6.1%
0.4 ms
C7s-SKL 0.2% | C7s-SKL 0.5% | C7s-SKL 0.6% 1.5 ms 0.3%
0.6 ms
C8-SKL 57.6% | C8-SKL 54.1% | C8-SKL 67.1% 1.7 ms 41.0%
3.2 ms
C9-SKL 0.0% | C9-SKL 0.0% | C9-SKL 0.0% 0.0 ms 0.0%
0.0 ms
C10-SKL 27.9% | C10-SKL 24.9% | C10-SKL 3.2% 4.4 ms 46.6%
8.0 ms
| Core | CPU 1 CPU 5
| POLL 0.4% | POLL 0.0% 0.0 ms 0.8%
3.7 ms
| C1E-SKL 1.4% | C1E-SKL 1.6% 0.2 ms 1.2%
0.4 ms
| C3-SKL 1.4% | C3-SKL 1.5% 0.3 ms 1.4%
0.8 ms
| C6-SKL 6.4% | C6-SKL 9.6% 0.6 ms 3.2%
0.5 ms
| C7s-SKL 0.1% | C7s-SKL 0.2% 0.4 ms 0.0%
0.0 ms
| C8-SKL 53.5% | C8-SKL 76.6% 2.4 ms 30.2%
2.4 ms
| C9-SKL 0.0% | C9-SKL 0.0% 0.0 ms 0.0%
0.0 ms
| C10-SKL 33.5% | C10-SKL 7.2% 4.6 ms 59.6%
9.7 ms
| Core | CPU 2 CPU 6
| POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
| C1E-SKL 0.6% | C1E-SKL 0.7% 0.1 ms 0.6%
0.2 ms
| C3-SKL 0.6% | C3-SKL 1.0% 0.2 ms 0.2%
0.1 ms
| C6-SKL 7.6% | C6-SKL 12.7% 0.5 ms 2.6%
0.7 ms
| C7s-SKL 0.0% | C7s-SKL 0.0% 0.0 ms 0.0%
0.0 ms
| C8-SKL 63.6% | C8-SKL 81.4% 2.2 ms 45.6%
3.5 ms
| C9-SKL 0.0% | C9-SKL 0.0% 0.0 ms 0.0%
0.0 ms
| C10-SKL 19.2% | C10-SKL 0.0% 0.0 ms 38.3%
4.8 ms
| Core | CPU 3 CPU 7
| POLL 0.0% | POLL 0.0% 0.0 ms 0.0%
0.0 ms
| C1E-SKL 0.6% | C1E-SKL 1.0% 0.2 ms 0.2%
0.7 ms
| C3-SKL 0.5% | C3-SKL 0.8% 0.2 ms 0.2%
0.4 ms
| C6-SKL 6.4% | C6-SKL 12.4% 0.6 ms 0.5%
0.5 ms
| C7s-SKL 0.2% | C7s-SKL 0.0% 0.0 ms 0.4%
0.7 ms
| C8-SKL 56.6% | C8-SKL 72.6% 2.1 ms 40.5%
5.2 ms
| C9-SKL 0.0% | C9-SKL 0.0% 0.0 ms 0.0%
0.0 ms
| C10-SKL 32.8% | C10-SKL 10.0% 6.0 ms 55.5%
7.5 ms
carl@carl-5520:~$ sudo tlp stat -p
--- TLP 0.8 --------------------------------------------
+++ Processor
CPU Model = Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 3900000 [kHz]
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 3900000 [kHz]
/sys/devices/system/cpu/cpu1/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 3900000 [kHz]
/sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 3900000 [kHz]
/sys/devices/system/cpu/cpu2/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu2/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu3/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu3/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu4/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu4/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu4/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu5/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu5/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu5/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu5/cpufreq/scaling_max_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu6/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu6/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu6/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu6/cpufreq/scaling_max_freq = 3900000 [kHz]
/sys/devices/system/cpu/cpu7/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu7/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu7/cpufreq/scaling_min_freq = 800000 [kHz]
/sys/devices/system/cpu/cpu7/cpufreq/scaling_max_freq = 800000 [kHz]
/sys/devices/system/cpu/intel_pstate/min_perf_pct = 100
/sys/devices/system/cpu/intel_pstate/max_perf_pct = 100
/sys/devices/system/cpu/intel_pstate/no_turbo = 0
x86_energy_perf_policy.cpu0 = powersave
x86_energy_perf_policy.cpu1 = powersave
x86_energy_perf_policy.cpu2 = powersave
x86_energy_perf_policy.cpu3 = powersave
x86_energy_perf_policy.cpu4 = powersave
x86_energy_perf_policy.cpu5 = powersave
x86_energy_perf_policy.cpu6 = powersave
x86_energy_perf_policy.cpu7 = powersave
/proc/sys/kernel/nmi_watchdog = 0
+++ Undervolting
PHC kernel not available.
--
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:
Fix Released
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 : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
