The old "ondemand" script was modified so that if the intel_pstate driver was being used, and therefore "ondemand" did not exist, it would fall through to setting the "powersave" governor (refer to bug #1314643). Note that "powersave" with the intel_pstate CPU frequency scaling driver is NOT the same as "powersave" with the acpi-cpufreq CPU frequency scaling driver.
The preferred governor with the intel_pstate driver is powersave. I'm saying that this:
# more modern processors that support intel_pstate behave worse with
# ondemand/powersave and should use performance
if [ `cat /sys/devices/system/cpu/cpu$FIRSTCPU/cpufreq/scaling_driver` = intel_pstate ]; then
echo 'CPU supports intel_pstate, keeping "performance"'
exit 0
fi
What has been done here is incorrect.
The old "ondemand" script was modified so that if the intel_pstate driver was being used, and therefore "ondemand" did not exist, it would fall through to setting the "powersave" governor (refer to bug #1314643). Note that "powersave" with the intel_pstate CPU frequency scaling driver is NOT the same as "powersave" with the acpi-cpufreq CPU frequency scaling driver.
The preferred governor with the intel_pstate driver is powersave. I'm saying that this:
# more modern processors that support intel_pstate behave worse with system/ cpu/cpu$ FIRSTCPU/ cpufreq/ scaling_ driver` = intel_pstate ]; then
# ondemand/powersave and should use performance
if [ `cat /sys/devices/
echo 'CPU supports intel_pstate, keeping "performance"'
exit 0
fi
is incorrect.