No fan control on an Acer Aspire 1694WLMi

No fan control on an Acer Aspire 1694WLMi

[DJAX]

Hello,

I got an Acer Aspire 1694WLMi with bios 3c25.

The fan control has no been fixed by my DSDT. The /proc/acpi/fan is empty.
I put the "cookbook" for debugging my DSDT, perhaps you can have a look at it to see if something is wrong.


The folder /proc/acpi/thermal_zone/THRM has:
----------------8<----------------
#cat /proc/acpi/thermal_zone/THRM/cooling_mode
<setting not supported>
cooling mode:   passive

#cat /proc/acpi/thermal_zone/THRM/polling_frequency
polling frequency:       30 seconds

#cat /proc/acpi/thermal_zone/THRM/state
state:                   ok

#cat /proc/acpi/thermal_zone/THRM/temperature
temperature:             44 C

#cat /proc/acpi/thermal_zone/THRM/trip_points
critical (S5):           97 C
passive:                 85 C: tc1=2 tc2=3 tsp=40 devices=0xdfc07168
---------------->8----------------

The fan module is present:
----------------8<----------------
# lsmod | grep fan
fan                     6020  0

#zgrep -i fan /proc/config.gz
CONFIG_ACPI_FAN=m
---------------->8----------------
At the boot, the fan doesn't start immediately, then it start at fisrt
speed. After a moment the fan rotates at full speed, but never goes
down, even if the temperature is 44°C.

The CPU is not at full speed (max:2000MHz):
----------------8<----------------
#cat /proc/cpuinfo  | grep "cpu MHz"
cpu MHz         : 798.354
---------------->8----------------

Any ideas?

Thank you for your help
Best regards
Didier






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Re: No fan control on an Acer Aspire 1694WLMi

[Pavel Machek]

Hi!

> At the boot, the fan doesn't start immediately, then it start at fisrt
> speed. After a moment the fan rotates at full speed, but never goes
> down, even if the temperature is 44°C.
> 
> The CPU is not at full speed (max:2000MHz):

Probably your fan is controlled by hardware... nothing we can solve.
								Pavel
-- 
teflon -- maybe it is a trademark, but it should not be.


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Re: No fan control on an Acer Aspire 1694WLMi

[DJAX]

Pavel Machek a écrit :

>Hi!
>
>  
>
>>At the boot, the fan doesn't start immediately, then it start at fisrt
>>speed. After a moment the fan rotates at full speed, but never goes
>>down, even if the temperature is 44°C.
>>
>>The CPU is not at full speed (max:2000MHz):
>>    
>>
>
>Probably your fan is controlled by hardware... nothing we can solve.
>								Pavel
>  
>
Thank you for answering.
I don't know how, but under Windows, the fan turns at low speed or at
high speed. With "cpuburn" active, the fan is at high speed, if I stop
cpuburn, the fan gets back to low speed. I notice with the program "PC
Wizard 2005" that the minimum cpu speed was around 661 MHz ( Under
Linux, the minimum I can get is ~798 MHz):
----------------8<----------------

Processeur : Intel Pentium M 760 @ 661 MHz

---------------->8----------------
The temperature seem to be 52°C, but the value doesn't vary.


So the fan souldn't act differently if only hardware based, should it?

Is there a way to speed down the CPU to 661MHz?


Best regards
Didier










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