Unresponsive system with powersave governor on Thinkpad X1 Carbon

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Using a Thinkpad X1 Carbon 2018 (6th Gen) on Ubuntu 18.10 with kernel 4.18 I notice that the system feels unresponsive even in AC mode.



It's most noticable in Firefox (but not restricted to it) where text input, auto complete and hover effects have a small lag. I can use the 'performance' governor and the lag goes away, but that's just in exchange for the fan running almost constantly.



It seems to me that theres a latency when switching CPU frequencies. Additionally, I noticed that cpupower can't display the transition latency nor the current CPU frequency through a hardware call.



$ sudo cpupower frequency-info
analyzing CPU 0:
 driver: intel_pstate
 CPUs which run at the same hardware frequency: 0
 CPUs which need to have their frequency coordinated by software: 0
 maximum transition latency: Cannot determine or is not supported.
 hardware limits: 400 MHz - 4.00 GHz
 available cpufreq governors: performance powersave
 current policy: frequency should be within 400 MHz and 4.00 GHz.
 The governor "powersave" may decide which speed to use
 within this range.
 current CPU frequency: Unable to call hardware
 current CPU frequency: 1.20 GHz (asserted by call to kernel)
 boost state support:
 Supported: yes
 Active: yes


$ cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency 
0



I'm running tlp with its default configuration. Nonetheless, here's the output of tlp-stat -p:



--- TLP 1.1 --------------------------------------------

+++ Processor
CPU model = Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz

/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_available_governors = performance powersave
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 400000 [kHz]
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 4000000 [kHz]
/sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference = balance_performance
/sys/devices/system/cpu/cpu0/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

/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_available_governors = performance powersave
/sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 400000 [kHz]
/sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 4000000 [kHz]
/sys/devices/system/cpu/cpu1/cpufreq/energy_performance_preference = balance_performance
/sys/devices/system/cpu/cpu1/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

/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_available_governors = performance powersave
/sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 400000 [kHz]
/sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 4000000 [kHz]
/sys/devices/system/cpu/cpu2/cpufreq/energy_performance_preference = balance_performance
/sys/devices/system/cpu/cpu2/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

/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_available_governors = performance powersave
/sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 400000 [kHz]
/sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 4000000 [kHz]
/sys/devices/system/cpu/cpu3/cpufreq/energy_performance_preference = balance_performance
/sys/devices/system/cpu/cpu3/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

/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_available_governors = performance powersave
/sys/devices/system/cpu/cpu4/cpufreq/scaling_min_freq = 400000 [kHz]
/sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq = 4000000 [kHz]
/sys/devices/system/cpu/cpu4/cpufreq/energy_performance_preference = balance_performance
/sys/devices/system/cpu/cpu4/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

/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_available_governors = performance powersave
/sys/devices/system/cpu/cpu5/cpufreq/scaling_min_freq = 400000 [kHz]
/sys/devices/system/cpu/cpu5/cpufreq/scaling_max_freq = 4000000 [kHz]
/sys/devices/system/cpu/cpu5/cpufreq/energy_performance_preference = balance_performance
/sys/devices/system/cpu/cpu5/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

/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_available_governors = performance powersave
/sys/devices/system/cpu/cpu6/cpufreq/scaling_min_freq = 400000 [kHz]
/sys/devices/system/cpu/cpu6/cpufreq/scaling_max_freq = 4000000 [kHz]
/sys/devices/system/cpu/cpu6/cpufreq/energy_performance_preference = balance_performance
/sys/devices/system/cpu/cpu6/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

/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_available_governors = performance powersave
/sys/devices/system/cpu/cpu7/cpufreq/scaling_min_freq = 400000 [kHz]
/sys/devices/system/cpu/cpu7/cpufreq/scaling_max_freq = 4000000 [kHz]
/sys/devices/system/cpu/cpu7/cpufreq/energy_performance_preference = balance_performance
/sys/devices/system/cpu/cpu7/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

/sys/devices/system/cpu/intel_pstate/min_perf_pct = 30 [%]
/sys/devices/system/cpu/intel_pstate/max_perf_pct = 100 [%]
/sys/devices/system/cpu/intel_pstate/no_turbo = 0
/sys/devices/system/cpu/intel_pstate/turbo_pct = 60 [%]
/sys/devices/system/cpu/intel_pstate/num_pstates = 37

x86_energy_perf_policy.cpu0 = performance 
x86_energy_perf_policy.cpu0 = HWP_REQ: min
x86_energy_perf_policy.cpu0 = HWP_CAP: low
x86_energy_perf_policy.cpu1 = performance 
x86_energy_perf_policy.cpu1 = HWP_REQ: min
x86_energy_perf_policy.cpu1 = HWP_CAP: low
x86_energy_perf_policy.cpu2 = performance 
x86_energy_perf_policy.cpu2 = HWP_REQ: min
x86_energy_perf_policy.cpu2 = HWP_CAP: low
x86_energy_perf_policy.cpu3 = performance 
x86_energy_perf_policy.cpu3 = HWP_REQ: min
x86_energy_perf_policy.cpu3 = HWP_CAP: low
x86_energy_perf_policy.cpu4 = performance 
x86_energy_perf_policy.cpu4 = HWP_REQ: min
x86_energy_perf_policy.cpu4 = HWP_CAP: low
x86_energy_perf_policy.cpu5 = performance 
x86_energy_perf_policy.cpu5 = HWP_REQ: min
x86_energy_perf_policy.cpu5 = HWP_CAP: low
x86_energy_perf_policy.cpu6 = performance 
x86_energy_perf_policy.cpu6 = HWP_REQ: min
x86_energy_perf_policy.cpu6 = HWP_CAP: low
x86_energy_perf_policy.cpu7 = performance 
x86_energy_perf_policy.cpu7 = HWP_REQ: min
x86_energy_perf_policy.cpu7 = HWP_CAP: low

/sys/module/workqueue/parameters/power_efficient = Y
/proc/sys/kernel/nmi_watchdog = 0

+++ Undervolting
PHC kernel not available.




The firmware installed is up-to-date and includes the latest fan and thermal fixes:



$ sudo dmidecode | less
BIOS Information
 Vendor: LENOVO
 Version: N23ET59W (1.34 )
 Release Date: 11/08/2018
 Address: 0xE0000





cpu intel thinkpad cpu-frequency







share|improve this question




























    2















    Using a Thinkpad X1 Carbon 2018 (6th Gen) on Ubuntu 18.10 with kernel 4.18 I notice that the system feels unresponsive even in AC mode.



    It's most noticable in Firefox (but not restricted to it) where text input, auto complete and hover effects have a small lag. I can use the 'performance' governor and the lag goes away, but that's just in exchange for the fan running almost constantly.



    It seems to me that theres a latency when switching CPU frequencies. Additionally, I noticed that cpupower can't display the transition latency nor the current CPU frequency through a hardware call.



    $ sudo cpupower frequency-info
    analyzing CPU 0:
     driver: intel_pstate
     CPUs which run at the same hardware frequency: 0
     CPUs which need to have their frequency coordinated by software: 0
     maximum transition latency: Cannot determine or is not supported.
     hardware limits: 400 MHz - 4.00 GHz
     available cpufreq governors: performance powersave
     current policy: frequency should be within 400 MHz and 4.00 GHz.
     The governor "powersave" may decide which speed to use
     within this range.
     current CPU frequency: Unable to call hardware
     current CPU frequency: 1.20 GHz (asserted by call to kernel)
     boost state support:
     Supported: yes
     Active: yes


    $ cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency 
    0



    I'm running tlp with its default configuration. Nonetheless, here's the output of tlp-stat -p:



    --- TLP 1.1 --------------------------------------------

    +++ Processor
    CPU model = Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz

    /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_available_governors = performance powersave
    /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 400000 [kHz]
    /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 4000000 [kHz]
    /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference = balance_performance
    /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

    /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_available_governors = performance powersave
    /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 400000 [kHz]
    /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 4000000 [kHz]
    /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_preference = balance_performance
    /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

    /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_available_governors = performance powersave
    /sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 400000 [kHz]
    /sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 4000000 [kHz]
    /sys/devices/system/cpu/cpu2/cpufreq/energy_performance_preference = balance_performance
    /sys/devices/system/cpu/cpu2/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

    /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_available_governors = performance powersave
    /sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 400000 [kHz]
    /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 4000000 [kHz]
    /sys/devices/system/cpu/cpu3/cpufreq/energy_performance_preference = balance_performance
    /sys/devices/system/cpu/cpu3/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

    /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_available_governors = performance powersave
    /sys/devices/system/cpu/cpu4/cpufreq/scaling_min_freq = 400000 [kHz]
    /sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq = 4000000 [kHz]
    /sys/devices/system/cpu/cpu4/cpufreq/energy_performance_preference = balance_performance
    /sys/devices/system/cpu/cpu4/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

    /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_available_governors = performance powersave
    /sys/devices/system/cpu/cpu5/cpufreq/scaling_min_freq = 400000 [kHz]
    /sys/devices/system/cpu/cpu5/cpufreq/scaling_max_freq = 4000000 [kHz]
    /sys/devices/system/cpu/cpu5/cpufreq/energy_performance_preference = balance_performance
    /sys/devices/system/cpu/cpu5/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

    /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_available_governors = performance powersave
    /sys/devices/system/cpu/cpu6/cpufreq/scaling_min_freq = 400000 [kHz]
    /sys/devices/system/cpu/cpu6/cpufreq/scaling_max_freq = 4000000 [kHz]
    /sys/devices/system/cpu/cpu6/cpufreq/energy_performance_preference = balance_performance
    /sys/devices/system/cpu/cpu6/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

    /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_available_governors = performance powersave
    /sys/devices/system/cpu/cpu7/cpufreq/scaling_min_freq = 400000 [kHz]
    /sys/devices/system/cpu/cpu7/cpufreq/scaling_max_freq = 4000000 [kHz]
    /sys/devices/system/cpu/cpu7/cpufreq/energy_performance_preference = balance_performance
    /sys/devices/system/cpu/cpu7/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

    /sys/devices/system/cpu/intel_pstate/min_perf_pct = 30 [%]
    /sys/devices/system/cpu/intel_pstate/max_perf_pct = 100 [%]
    /sys/devices/system/cpu/intel_pstate/no_turbo = 0
    /sys/devices/system/cpu/intel_pstate/turbo_pct = 60 [%]
    /sys/devices/system/cpu/intel_pstate/num_pstates = 37

    x86_energy_perf_policy.cpu0 = performance 
    x86_energy_perf_policy.cpu0 = HWP_REQ: min
    x86_energy_perf_policy.cpu0 = HWP_CAP: low
    x86_energy_perf_policy.cpu1 = performance 
    x86_energy_perf_policy.cpu1 = HWP_REQ: min
    x86_energy_perf_policy.cpu1 = HWP_CAP: low
    x86_energy_perf_policy.cpu2 = performance 
    x86_energy_perf_policy.cpu2 = HWP_REQ: min
    x86_energy_perf_policy.cpu2 = HWP_CAP: low
    x86_energy_perf_policy.cpu3 = performance 
    x86_energy_perf_policy.cpu3 = HWP_REQ: min
    x86_energy_perf_policy.cpu3 = HWP_CAP: low
    x86_energy_perf_policy.cpu4 = performance 
    x86_energy_perf_policy.cpu4 = HWP_REQ: min
    x86_energy_perf_policy.cpu4 = HWP_CAP: low
    x86_energy_perf_policy.cpu5 = performance 
    x86_energy_perf_policy.cpu5 = HWP_REQ: min
    x86_energy_perf_policy.cpu5 = HWP_CAP: low
    x86_energy_perf_policy.cpu6 = performance 
    x86_energy_perf_policy.cpu6 = HWP_REQ: min
    x86_energy_perf_policy.cpu6 = HWP_CAP: low
    x86_energy_perf_policy.cpu7 = performance 
    x86_energy_perf_policy.cpu7 = HWP_REQ: min
    x86_energy_perf_policy.cpu7 = HWP_CAP: low

    /sys/module/workqueue/parameters/power_efficient = Y
    /proc/sys/kernel/nmi_watchdog = 0

    +++ Undervolting
    PHC kernel not available.




    The firmware installed is up-to-date and includes the latest fan and thermal fixes:



    $ sudo dmidecode | less
    BIOS Information
     Vendor: LENOVO
     Version: N23ET59W (1.34 )
     Release Date: 11/08/2018
     Address: 0xE0000





    cpu intel thinkpad cpu-frequency







    share|improve this question


























      2












      2








      2








      Using a Thinkpad X1 Carbon 2018 (6th Gen) on Ubuntu 18.10 with kernel 4.18 I notice that the system feels unresponsive even in AC mode.



      It's most noticable in Firefox (but not restricted to it) where text input, auto complete and hover effects have a small lag. I can use the 'performance' governor and the lag goes away, but that's just in exchange for the fan running almost constantly.



      It seems to me that theres a latency when switching CPU frequencies. Additionally, I noticed that cpupower can't display the transition latency nor the current CPU frequency through a hardware call.



      $ sudo cpupower frequency-info
      analyzing CPU 0:
       driver: intel_pstate
       CPUs which run at the same hardware frequency: 0
       CPUs which need to have their frequency coordinated by software: 0
       maximum transition latency: Cannot determine or is not supported.
       hardware limits: 400 MHz - 4.00 GHz
       available cpufreq governors: performance powersave
       current policy: frequency should be within 400 MHz and 4.00 GHz.
       The governor "powersave" may decide which speed to use
       within this range.
       current CPU frequency: Unable to call hardware
       current CPU frequency: 1.20 GHz (asserted by call to kernel)
       boost state support:
       Supported: yes
       Active: yes


      $ cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency 
      0



      I'm running tlp with its default configuration. Nonetheless, here's the output of tlp-stat -p:



      --- TLP 1.1 --------------------------------------------

      +++ Processor
      CPU model = Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu2/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu2/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu3/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu3/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu4/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu4/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu4/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu5/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu5/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu5/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu5/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu6/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu6/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu6/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu6/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu7/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu7/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu7/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu7/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /sys/devices/system/cpu/intel_pstate/min_perf_pct = 30 [%]
      /sys/devices/system/cpu/intel_pstate/max_perf_pct = 100 [%]
      /sys/devices/system/cpu/intel_pstate/no_turbo = 0
      /sys/devices/system/cpu/intel_pstate/turbo_pct = 60 [%]
      /sys/devices/system/cpu/intel_pstate/num_pstates = 37

      x86_energy_perf_policy.cpu0 = performance 
      x86_energy_perf_policy.cpu0 = HWP_REQ: min
      x86_energy_perf_policy.cpu0 = HWP_CAP: low
      x86_energy_perf_policy.cpu1 = performance 
      x86_energy_perf_policy.cpu1 = HWP_REQ: min
      x86_energy_perf_policy.cpu1 = HWP_CAP: low
      x86_energy_perf_policy.cpu2 = performance 
      x86_energy_perf_policy.cpu2 = HWP_REQ: min
      x86_energy_perf_policy.cpu2 = HWP_CAP: low
      x86_energy_perf_policy.cpu3 = performance 
      x86_energy_perf_policy.cpu3 = HWP_REQ: min
      x86_energy_perf_policy.cpu3 = HWP_CAP: low
      x86_energy_perf_policy.cpu4 = performance 
      x86_energy_perf_policy.cpu4 = HWP_REQ: min
      x86_energy_perf_policy.cpu4 = HWP_CAP: low
      x86_energy_perf_policy.cpu5 = performance 
      x86_energy_perf_policy.cpu5 = HWP_REQ: min
      x86_energy_perf_policy.cpu5 = HWP_CAP: low
      x86_energy_perf_policy.cpu6 = performance 
      x86_energy_perf_policy.cpu6 = HWP_REQ: min
      x86_energy_perf_policy.cpu6 = HWP_CAP: low
      x86_energy_perf_policy.cpu7 = performance 
      x86_energy_perf_policy.cpu7 = HWP_REQ: min
      x86_energy_perf_policy.cpu7 = HWP_CAP: low

      /sys/module/workqueue/parameters/power_efficient = Y
      /proc/sys/kernel/nmi_watchdog = 0

      +++ Undervolting
      PHC kernel not available.




      The firmware installed is up-to-date and includes the latest fan and thermal fixes:



      $ sudo dmidecode | less
      BIOS Information
       Vendor: LENOVO
       Version: N23ET59W (1.34 )
       Release Date: 11/08/2018
       Address: 0xE0000





      cpu intel thinkpad cpu-frequency







      share|improve this question
















      Using a Thinkpad X1 Carbon 2018 (6th Gen) on Ubuntu 18.10 with kernel 4.18 I notice that the system feels unresponsive even in AC mode.



      It's most noticable in Firefox (but not restricted to it) where text input, auto complete and hover effects have a small lag. I can use the 'performance' governor and the lag goes away, but that's just in exchange for the fan running almost constantly.



      It seems to me that theres a latency when switching CPU frequencies. Additionally, I noticed that cpupower can't display the transition latency nor the current CPU frequency through a hardware call.



      $ sudo cpupower frequency-info
      analyzing CPU 0:
       driver: intel_pstate
       CPUs which run at the same hardware frequency: 0
       CPUs which need to have their frequency coordinated by software: 0
       maximum transition latency: Cannot determine or is not supported.
       hardware limits: 400 MHz - 4.00 GHz
       available cpufreq governors: performance powersave
       current policy: frequency should be within 400 MHz and 4.00 GHz.
       The governor "powersave" may decide which speed to use
       within this range.
       current CPU frequency: Unable to call hardware
       current CPU frequency: 1.20 GHz (asserted by call to kernel)
       boost state support:
       Supported: yes
       Active: yes


      $ cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency 
      0



      I'm running tlp with its default configuration. Nonetheless, here's the output of tlp-stat -p:



      --- TLP 1.1 --------------------------------------------

      +++ Processor
      CPU model = Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu2/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu2/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu3/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu3/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu4/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu4/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu4/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu5/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu5/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu5/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu5/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu6/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu6/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu6/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu6/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /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_available_governors = performance powersave
      /sys/devices/system/cpu/cpu7/cpufreq/scaling_min_freq = 400000 [kHz]
      /sys/devices/system/cpu/cpu7/cpufreq/scaling_max_freq = 4000000 [kHz]
      /sys/devices/system/cpu/cpu7/cpufreq/energy_performance_preference = balance_performance
      /sys/devices/system/cpu/cpu7/cpufreq/energy_performance_available_preferences = default performance balance_performance balance_power power 

      /sys/devices/system/cpu/intel_pstate/min_perf_pct = 30 [%]
      /sys/devices/system/cpu/intel_pstate/max_perf_pct = 100 [%]
      /sys/devices/system/cpu/intel_pstate/no_turbo = 0
      /sys/devices/system/cpu/intel_pstate/turbo_pct = 60 [%]
      /sys/devices/system/cpu/intel_pstate/num_pstates = 37

      x86_energy_perf_policy.cpu0 = performance 
      x86_energy_perf_policy.cpu0 = HWP_REQ: min
      x86_energy_perf_policy.cpu0 = HWP_CAP: low
      x86_energy_perf_policy.cpu1 = performance 
      x86_energy_perf_policy.cpu1 = HWP_REQ: min
      x86_energy_perf_policy.cpu1 = HWP_CAP: low
      x86_energy_perf_policy.cpu2 = performance 
      x86_energy_perf_policy.cpu2 = HWP_REQ: min
      x86_energy_perf_policy.cpu2 = HWP_CAP: low
      x86_energy_perf_policy.cpu3 = performance 
      x86_energy_perf_policy.cpu3 = HWP_REQ: min
      x86_energy_perf_policy.cpu3 = HWP_CAP: low
      x86_energy_perf_policy.cpu4 = performance 
      x86_energy_perf_policy.cpu4 = HWP_REQ: min
      x86_energy_perf_policy.cpu4 = HWP_CAP: low
      x86_energy_perf_policy.cpu5 = performance 
      x86_energy_perf_policy.cpu5 = HWP_REQ: min
      x86_energy_perf_policy.cpu5 = HWP_CAP: low
      x86_energy_perf_policy.cpu6 = performance 
      x86_energy_perf_policy.cpu6 = HWP_REQ: min
      x86_energy_perf_policy.cpu6 = HWP_CAP: low
      x86_energy_perf_policy.cpu7 = performance 
      x86_energy_perf_policy.cpu7 = HWP_REQ: min
      x86_energy_perf_policy.cpu7 = HWP_CAP: low

      /sys/module/workqueue/parameters/power_efficient = Y
      /proc/sys/kernel/nmi_watchdog = 0

      +++ Undervolting
      PHC kernel not available.




      The firmware installed is up-to-date and includes the latest fan and thermal fixes:



      $ sudo dmidecode | less
      BIOS Information
       Vendor: LENOVO
       Version: N23ET59W (1.34 )
       Release Date: 11/08/2018
       Address: 0xE0000





      cpu intel thinkpad cpu-frequency




      cpu intel thinkpad cpu-frequency






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Feb 26 at 13:24







      jnns

















      asked Feb 22 at 12:26









      jnnsjnns

      614




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