P-State Max/Min performance values not working correctly on kernel 4.0

[lamiska]

Intel p-state performance setting is not working correctly under linux kernel 4.0

Here is what I have in /etc/default/tlp:

CPU_MIN_PERF_ON_AC=50
CPU_MAX_PERF_ON_AC=100
CPU_MIN_PERF_ON_BAT=0
CPU_MAX_PERF_ON_BAT=30

Here is output from tlp-stat -p on ac:

/sys/devices/system/cpu/intel_pstate/min_perf_pct = 100
/sys/devices/system/cpu/intel_pstate/max_perf_pct = 100

and on batt:

/sys/devices/system/cpu/intel_pstate/min_perf_pct = 47
/sys/devices/system/cpu/intel_pstate/max_perf_pct = 30

Rebooting into 3.19 kernel fixes the issue for me and tlp-stat -p is showing correct values.
My tlp version is 0.7, CPU is i3-4005U, Archlinux distribution.

[linrunner]

Hi,

this is (likely) a kernel issue with your specific hardware. I suggest you file a kernel bug.

See #122 too.