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The lenovo G50-70 fan never comes on so any workload above idle cause
overheating. I tried setting /proc/acpi/ibm/fan but it doesnt show the fan
speed at anything other than 0
I'm using this kernel:
Linux erb3 3.17.1-2.g5c4d099-default #1 SMP Sat Oct 18 23:36:23 UTC 2014
(5c4d099) x86_64 x86_64 x86_64 GNU/Linux

# cat /proc/acpi/ibm/fan
status:         enabled
speed:          0
level:          7
commands:       level <level> (<level> is 0-7, auto, disengaged, full-speed)
commands:       enable, disable
commands:       watchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))

lsmod shows thinkpad_acpi x86_pkg_temp_thermal loaded

# ls /sys/devices/virtual/thermal/
cooling_device0  cooling_device1  cooling_device2  cooling_device3 
cooling_device4  thermal_zone0
# for((i=0; i<5; i++)); do cat
/sys/devices/virtual/thermal/cooling_device${i}/cur_state; done
0
0
0
0
-1
changing the above values has no effect.

/sys/devices/virtual/thermal/thermal_zone0/temp shows the correct temperature
(47000 at idle at the moment)


Here is some info on the HW:
    description: Notebook
    product: 20351 (LENOVO_MT_20351_BU_idea_FM_Lenovo G50-70)
    vendor: LENOVO
    version: Lenovo G50-70
    serial: 1036401201536
    width: 64 bits
    description: Motherboard
    product: Lancer 5A2
    vendor: LENOVO
    version: 31900058WIN
    description: BIOS
    vendor: LENOVO
    version: 9ACN26WW (This is the latest bios as far as i know)
    date: 07/31/2014
    description: CPU
    product: Core i7 (To Be Filled By O.E.M.)
    vendor: Intel Corp.
    version: Intel(R) Core(TM) i7-4510U CPU @ 2.00GHz


Reproducible: Always

Steps to Reproduce:
1. install opensuse 13,1
2. install & boot opensuse 17.1 kernel 
3. observe fan speed (0 always) even with temperature at 80C+
Actual Results:  
fan is not running at all

Expected Results:  
fan should be on and responding to cpu temperature