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El controlador Intel_pstate no se carga cuando se agrega al archivo grub

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El controlador Intel_pstate no se carga cuando se agrega al archivo grub

tengo un

Processor   Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
Memory  16305MB (2531MB used)
Machine Type    Laptop
Operating System    Ubuntu 20.04.3 LTS

En mi/etc/default/grubarchivo tengo la linea

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_pstate=enable"

hice unsudo actualización-grubdespués de los cambios pero cuando hago un cpupower frecuencia-info o cpufreq-info --driverdice que el controlador utilizado esintel_cpufreq

rt@sys76:~$ cpufreq-info --driver
intel_cpufreq


rt@sys76:~$ cpupower frequency-info

analyzing CPU 0:
  driver: intel_cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 20.0 us
  hardware limits: 800 MHz - 3.40 GHz
  available cpufreq governors: conservative ondemand userspace powersave performance schedutil
  current policy: frequency should be within 1.70 GHz and 3.40 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 798 MHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: yes
rt@sys76:~$

¿Cómo puedo conseguir elinformación-cpufreq --controlador usarintel_pstate¿conductor?

Respuesta1

Su procesador, i7-4700MQ, es anterior al control HWP (HardWare Pstate). La ruta de migración, según lo determina el grupo de administración de energía del kernel, para estos procesadores Intel es establecer de forma predeterminada que el controlador de escalado de frecuencia de la CPU intel_pstate esté en modo pasivo utilizando el regulador de escalado schedutil. Para ello se realizó este compromiso:

cometer 33aa46f252c703e42c81a76696cd0c240f2281e4 Autor: Rafael J. Wysocki[correo electrónico protegido]Fecha: miércoles 25 de marzo 15:03:35 2020 +0100

cpufreq: intel_pstate: Use passive mode by default without HWP

After recent changes allowing scale-invariant utilization to be
used on x86, the schedutil governor on top of intel_pstate in the
passive mode should be on par with (or better than) the active mode
"powersave" algorithm of intel_pstate on systems in which
hardware-managed P-states (HWP) are not used, so it should not be
necessary to use the internal scaling algorithm in those cases.

Accordingly, modify intel_pstate to start in the passive mode by
default if the processor at hand does not support HWP of if the driver
is requested to avoid using HWP through the kernel command line.

Among other things, that will allow utilization clamps and the
support for RT/DL tasks in the schedutil governor to be utilized on
systems in which intel_pstate is used.

En realidad, está utilizando el controlador de escalado de frecuencia de la CPU intel_pstate, sin embargo, está en modo pasivo. Prueba esto:

echo active | sudo tee /sys/devices/system/cpu/intel_pstate/status

y luego verifique:

cat /sys/devices/system/cpu/intel_pstate/status

Si eso funciona como se esperaba, cambie su línea de grub a:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_pstate=active"

y vea si arranca como desea.

Tenga en cuenta que el controlador de escala de frecuencia de la CPU intel_cpufreqes solo el intel_pstatecontrolador en modo pasivo.

Ejemplo:

doug@s19:~/temp$ grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu10/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu11/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu1/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu2/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu3/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu4/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu5/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu6/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu7/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu8/cpufreq/scaling_driver:intel_cpufreq
/sys/devices/system/cpu/cpu9/cpufreq/scaling_driver:intel_cpufreq

doug@s19:~/temp$ cat /sys/devices/system/cpu/intel_pstate/status
passive
doug@s19:~/temp$ echo active | sudo tee /sys/devices/system/cpu/intel_pstate/status
active

doug@s19:~/temp$ grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu10/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu11/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu1/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu2/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu3/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu4/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu5/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu6/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu7/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu8/cpufreq/scaling_driver:intel_pstate
/sys/devices/system/cpu/cpu9/cpufreq/scaling_driver:intel_pstate

Respuesta2

La fuente de alimentación de la computadora portátil dejó de funcionar y la reemplacé. De repente, la CPU volvió a funcionar correctamente. Parece que la fuente de alimentación estaba fallando y no generaba suficiente corriente.

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