[Bug 68191] Re: cpufreq scaling_grovernor only saved for CPU0 on SMP following suspend/resume.

[Nick Gerner]

I'm not sure if this is being tracked elsewhere, but I'm certainly
finding that /sys/devices/system/cpu/cpufreq/ondemand/up_threshold (for
example) gets reset after resume from sleep.

I'm using sysfsutils and my workaround is to drop a script in
/etc/pm/sleep.d/90_sysfsutils:

#!/bin/sh

# Tell grub that resume was successful

case "$1" in
        resume)
        /etc/init.d/sysfsutils restart
                ;;
esac

I'm not sure if that's ideal, but it seems to get the job done.

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https://bugs.launchpad.net/bugs/68191

Title:
  cpufreq scaling_grovernor only saved for CPU0 on SMP following
  suspend/resume.

Status in “acpi-support” package in Ubuntu:
  Confirmed

Bug description:
  After a StandBy or Suspend to Ram one of the CPU Cores (Intel Core Duo) stays on full speed.
  Speedstep seems not to be activated

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