# Based on the shown email in Comment 2 Rafael J Wysocki asked me on 2014-03-09 # 18:58:
> This almost certainly is an ACPI regression, but I'm not sure whether
> thermal management or CPU power management is broken on your system.
>
> Can you compare the contents of /sys/class/thermal/ from working and
> not working kernels, please?
>
> Rafael
>
# which I answered the following way (I hope it'll be complete on here):

Hi again,
unfortunately you didn't specify how deeply I should dig into /sys/class/thermal. So you get the lines from # BOF # to # EOF # below. I hope they're readable without more comments.

The most remarkable changes, in my eyes, had happened within "thermal_zone1".

Best regards,
Manuel Krause


# BOF #
Following ones are all from /sys/class/thermal/ which are links to -> ../../devices/virtual/thermal/

I've listed the directories in sections of cooling_devices and thermal_zones separately for each bad/good kernel. For Emailing purposes only. You can merge them into a spreadsheet for your evaluation on your own. I've left out reporting some subdirs and subdir's values that _really_ didn't seem to need attention.

Also, I've had collected the #sensors output for each readout, having reproduced nearly the same workload, represented by the "Fan speed" (thermal_zone4==FDTZ).

And I've done my very best to not produce typos or c&p errors.


 3.13.5 -- 20140309 -- 20:52 -- bad
=============================
dir             |-
                 /type       /cur_state  /max_state
cooling_device0  Processor    0          10
cooling_device1  Processor    0          10
cooling_device2  Fan          0           1
cooling_device3  Fan          1           1
cooling_device4  Fan          0           1
cooling_device5  Fan          0           1
cooling_device6  Fan          0           1
cooling_device7  LCD          0          24

 3.12.13 -- 20140310 -- 00:26 -- good
==============================
dir             |-
                 /type       /cur_state  /max_state
cooling_device0  Processor    0          10
cooling_device1  Processor    0          10
cooling_device2  Fan          0           1
cooling_device3  Fan          1           1
cooling_device4  Fan          1           1
cooling_device5  Fan          1           1
cooling_device6  Fan          1           1
cooling_device7  LCD          0          24


 3.13.5 -- 20140309 -- 20:52 -- bad
=============================
dir          |-
              /passive /temp  |-     /cdev?_  /trip_   /trip_
                                      trip_    point_   point_
                                      point    ?_temp   ?_type
thermal_zone0  0        68000   ?=0    n.a.   256000   critical
thermal_zone1   n.a.    70000 |-
                                ?=0   6       110000   critical
                                ?=1   5       107000   passive
                                ?=2   4        90000   active
                                ?=3   3        75000   active
                                ?=4   2        55000   active
                                ?=5   1        45000   active
                                ?=6   1        30000   active
thermal_zone2   n.a.    54000 |-
                                ?=0   1       105000   critical
                                ?=1   1        95000   passive
thermal_zone3   n.a.    25800 |-
                                ?=0   1       110000   critical
                                ?=1   1        60000   passive
thermal_zone4  0        58000   ?=0    n.a.   110000   critical


 3.12.13 -- 20140310 -- 00:26 -- good
==============================
dir          |-
              /passive /temp  |-     /cdev?_  /trip_   /trip_
                                      trip_    point_   point_
                                      point    ?_temp   ?_type
thermal_zone0  0        50000   ?=0    n.a.   256000   critical
thermal_zone1   n.a.    70000 |-
                                ?=0   1       110000   critical
                                ?=1   1       107000   passive
                                ?=2   2        90000   active
                                ?=3   3        67000   active
                                ?=4   4        55000   active
                                ?=5   5        45000   active
                                ?=6   6        30000   active
thermal_zone2   n.a.    53000 |-
                                ?=0   1       105000   critical
                                ?=1   1        95000   passive
thermal_zone3   n.a.    25600 |-
                                ?=0   1       110000   critical
                                ?=1   1        60000   passive
thermal_zone4  0        58000   ?=0    n.a.   110000   critical

---
Legend here:
       /type  is always  acpitz
       /mode             enabled
       /policy           step_wise

      - from kernel ACPI initialisation: thermal_zone0==DTSZ,
         thermal_zone1==CPUZ, thermal_zone2==SKNZ,
         thermal_zone3==BATZ, thermal_zone4==FDTZ
      - n.a. means      file or value is not available
___
Legend in general:
             /power/control          is always  auto
             /power/runtime_status              unsupported
             /uevent                            ''==empty

----------------------------------------------------------------

 3.13.5 -- 20140309 -- 20:52 -- bad
=============================
# sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +68.0°C  (crit = +256.0°C)
temp2:        +70.0°C  (crit = +110.0°C)
temp3:        +54.0°C  (crit = +105.0°C)
temp4:        +25.8°C  (crit = +110.0°C)
temp5:        +58.0°C  (crit = +110.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Core 0:       +66.0°C  (high = +105.0°C, crit = +105.0°C)
Core 1:       +63.0°C  (high = +105.0°C, crit = +105.0°C)


 3.12.13 -- 20140310 -- 00:26 -- good
==============================
# sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +50.0°C  (crit = +256.0°C)
temp2:        +70.0°C  (crit = +110.0°C)
temp3:        +53.0°C  (crit = +105.0°C)
temp4:        +25.6°C  (crit = +110.0°C)
temp5:        +58.0°C  (crit = +110.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Core 0:       +65.0°C  (high = +105.0°C, crit = +105.0°C)
Core 1:       +61.0°C  (high = +105.0°C, crit = +105.0°C)

# EOF #