Your kernel does not have cpupower but according to tlp -p, the test kernel is now using pstate. Is there a more appropriate way to confirm this other than using tlp? Also, according to tlp, the scaling-govenors swtich appropriately (performace for A/C and powersave for bat).
Lastly, I just wanted to confirm that this test kernel is NOT using C states deeper than C3. Just in case ;) carl@carl-5520:~$ uname -a Linux carl-5520 4.4.0-69-generic #90 SMP Tue Mar 21 11:45:00 CST 2017 x86_64 x86_64 x86_64 GNU/Linux 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 = performance /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 800000 [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 = performance /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 800000 [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 = performance /sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 800000 [kHz] /sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 3900000 [kHz] /sys/devices/system/cpu/cpu3/cpufreq/scaling_driver = intel_pstate /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor = performance /sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 800000 [kHz] /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 3900000 [kHz] /sys/devices/system/cpu/cpu4/cpufreq/scaling_driver = intel_pstate /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor = performance /sys/devices/system/cpu/cpu4/cpufreq/scaling_min_freq = 800000 [kHz] /sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq = 3900000 [kHz] /sys/devices/system/cpu/cpu5/cpufreq/scaling_driver = intel_pstate /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor = performance /sys/devices/system/cpu/cpu5/cpufreq/scaling_min_freq = 800000 [kHz] /sys/devices/system/cpu/cpu5/cpufreq/scaling_max_freq = 3900000 [kHz] /sys/devices/system/cpu/cpu6/cpufreq/scaling_driver = intel_pstate /sys/devices/system/cpu/cpu6/cpufreq/scaling_governor = performance /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 = performance /sys/devices/system/cpu/cpu7/cpufreq/scaling_min_freq = 800000 [kHz] /sys/devices/system/cpu/cpu7/cpufreq/scaling_max_freq = 3900000 [kHz] /sys/devices/system/cpu/intel_pstate/min_perf_pct = 0 /sys/devices/system/cpu/intel_pstate/max_perf_pct = 100 /sys/devices/system/cpu/intel_pstate/no_turbo = 0 x86_energy_perf_policy: program for your kernel not installed. /proc/sys/kernel/nmi_watchdog = 0 +++ Undervolting PHC kernel not available. 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 = 800000 [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 = 800000 [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 = 3900000 [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 = 3900000 [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 = 3900000 [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 = 3900000 [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 = 3900000 [kHz] /sys/devices/system/cpu/intel_pstate/min_perf_pct = 20 /sys/devices/system/cpu/intel_pstate/max_perf_pct = 40 /sys/devices/system/cpu/intel_pstate/no_turbo = 0 x86_energy_perf_policy: program for your kernel not installed. /proc/sys/kernel/nmi_watchdog = 0 +++ Undervolting -- 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/1674390 Title: Kernel 4.4.0-67 Defaults to ACPI-cpufreq rather than P-State - Dell Precision 5520 Status in linux package in Ubuntu: Confirmed Bug description: sudo cpupower frequency-info analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us. hardware limits: 800 MHz - 2.80 GHz available frequency steps: 2.80 GHz, 2.80 GHz, 2.70 GHz, 2.60 GHz, 2.40 GHz, 2.30 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.50 GHz, 1.40 GHz, 1.20 GHz, 1.10 GHz, 900 MHz, 800 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 800 MHz and 2.80 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 1.40 GHz (asserted by call to hardware). cpufreq stats: 2.80 GHz:3.03%, 2.80 GHz:0.01%, 2.70 GHz:0.27%, 2.60 GHz:0.68%, 2.40 GHz:0.70%, 2.30 GHz:1.52%, 2.00 GHz:2.20%, 1.90 GHz:1.36%, 1.80 GHz:1.80%, 1.70 GHz:3.38%, 1.50 GHz:3.78%, 1.40 GHz:5.64%, 1.20 GHz:7.07%, 1.10 GHz:13.71%, 900 MHz:28.54%, 800 MHz:26.32% (2921841) boost state support: Supported: yes Active: yes ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-67-generic 4.4.0-67.88 ProcVersionSignature: Ubuntu 4.4.0-67.88-generic 4.4.49 Uname: Linux 4.4.0-67-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: carl 3165 F.... pulseaudio CurrentDesktop: Unity Date: Mon Mar 20 08:25:44 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 (10 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-4.4.0-67-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-4.4.0-67-generic N/A linux-backports-modules-4.4.0-67-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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