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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1674390 Title: Kernel 4.4.0-67 Defaults to ACPI-cpufreq rather than P-State - Dell Precision 5520 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1674390/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com 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