[Bug 217931] amd-pstate lacks crucial features: CPU frequency and boost control

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217931

--- Comment #17 from Artem S. Tashkinov (aros@gmx.com) ---
> When you say getting stuck in lowest supported frequency does it resemble bug
> 218305 perhaps?

It's the same bug I've just refiled it.

> What is your CPU scaling governor when it happened?  And does it only happen
> with suspend/resume or only with reboot?

cpupower frequency-info
analyzing CPU 4:
  driver: amd-pstate-epp
  CPUs which run at the same hardware frequency: 4
  CPUs which need to have their frequency coordinated by software: 4
  maximum transition latency:  Cannot determine or is not supported.
  hardware limits: 400 MHz - 5.61 GHz
  available cpufreq governors: performance powersave
  current policy: frequency should be within 400 MHz and 5.61 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 1.40 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: yes
    AMD PSTATE Highest Performance: 214. Maximum Frequency: 5.61 GHz.
    AMD PSTATE Nominal Performance: 145. Nominal Frequency: 3.80 GHz.
    AMD PSTATE Lowest Non-linear Performance: 42. Lowest Non-linear Frequency:
1.10 GHz.
    AMD PSTATE Lowest Performance: 16. Lowest Frequency: 400 MHz.

It happens both with amd-pstate-epp and acpi-cpufreq.

It only happens after a random number of suspend/resume cycles (as low as one,
as high as three or four). Rebooting/power cycling always fixes the issue.

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