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[Bug 1018770] cpu frequency scaling intel_pstate broken
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Sat, 13 May 2017 13:45:58 +0000
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Todd Dailey <tdailey@xxxxxxxxxx> changed:

What |Removed |Added
CC| |tdailey@xxxxxxxxxx

--- Comment #12 from Todd Dailey <tdailey@xxxxxxxxxx> ---
Identical problem. CPU runs at 3800 - 4400 MHz continuously.

Intel i7-4790K

cpupower frequency-info outputs:

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: 800 MHz - 4.40 GHz
available cpufreq governors: performance powersave
current policy: frequency should be within 800 MHz and 4.40 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 4.37 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes

Adding intel_pstate=disable to kernel command line results in more normal CPU
frequency scaling.

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