Mario Limonciello schrieb am Di 24. Feb, 16:14 (+0000):
> Don't see failures.  Looks to me like this should be kernel driver
> behavior then.

But the log says:

Core           Loaded configuration file 
'/var/lib/power-profiles-daemon/state.ini'
Core           Name 'net.hadess.PowerProfiles' acquired
Core           Name 'org.freedesktop.UPower.PowerProfiles' acquired
Core           Handling driver 'fake'
Core           probe () failed for driver fake, skipping
Core           Handling driver 'platform_profile'
PlatformDriver No platform_profile sysfs file
Core           probe () failed for driver platform_profile, skipping
Core           Handling driver 'intel_pstate'
Utils          Writing 'powersave' to 
'/sys/devices/system/cpu/cpufreq/policy6/scaling_governor'
Utils          Writing 'powersave' to 
'/sys/devices/system/cpu/cpufreq/policy4/scaling_governor'

So it power-profile-daemon is the one setting the governor on startup, but
not later on profile update:

Core           Applying profile 'performance' from configuration file
Core           Setting active profile 'performance' for reason 'reset' 
(current: 'performance')
Utils          Writing 'performance' to 
'/sys/devices/system/cpu/cpufreq/policy6/energy_performance_preference'
Utils          Writing 'performance' to 
'/sys/devices/system/cpu/cpufreq/policy4/energy_performance_preference'

Utils          Writing '0' to 
'/sys/devices/system/cpu/cpu6/power/energy_perf_bias'
Utils          Writing '0' to 
'/sys/devices/system/cpu/cpu4/power/energy_perf_bias'

Core           Battery state monitor required, connecting to upower...
Core           Battery change monitor required, connecting to upower...
Core           Suspension state monitor required, monitoring logind...
Core           Power Changed because of reason ac
Utils          Writing 'performance' to 
'/sys/devices/system/cpu/cpufreq/policy6/energy_performance_preference'
Utils          Writing 'performance' to 
'/sys/devices/system/cpu/cpufreq/policy4/energy_performance_preference'

Utils          Writing '0' to 
'/sys/devices/system/cpu/cpu6/power/energy_perf_bias'
Utils          Writing '0' to 
'/sys/devices/system/cpu/cpu4/power/energy_perf_bias'

I don't see where this should be a kernel driver behaviour.

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https://bugs.launchpad.net/bugs/2142567

Title:
  power saving does not change CPU governor

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