No fan control on an Acer Aspire 1694WLMi

DISCUSSION DJAX 2 participants 3 messages Jun 27, 2005 – Jun 30, 2005 2 messages not in the archive ACPI

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DJAX

author

2005-06-27 21:44 UTC #0 lore raw

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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Pavel Machek

2005-06-28 20:22 UTC #2 lore raw

Hi!

Quoted 5 lines

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

Signature · 8 lines

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SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
from IBM. Find simple to follow Roadmaps, straightforward articles,
informative Webcasts and more! Get everything you need to get up to
speed, fast. http://ads.osdn.com/?ad_idt77&alloc_id492&op=click

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DJAX

author

2005-06-30 21:33 UTC #4 lore raw

Quoted 8 lines · Pavel Machek

Hi!
Quoted 4 lines
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.

Quoted 8 lines

Quoted 3 lines
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