Arch Linux

mikicz

Member

Registered: 2010-07-31

Posts: 4

Dell Inspiron Mini fan stil running

Hello, after some of recent updates, the fan in my Inspiron Mini runs continuously. It starts when hal daemon starts and runs till turn off. acpi -V shows:

Battery 0: Discharging, 8%, 00:13:58 remaining
Battery 0: design capacity 2439 mAh, last full capacity 2352 mAh = 96%
Adapter 0: off-line
Thermal 0: ok, 29.0 degrees C
Thermal 0: trip point 0 switches to mode critical at temperature 102.0 degrees C
Thermal 0: trip point 1 switches to mode passive at temperature 95.0 degrees C
Cooling 0: LCD 14 of 15
Cooling 1: Processor 0 of 10
Cooling 2: Processor 0 of 10

how can I turn that fan off and let it run only when necessary?

lagagnon

Member

From: an Island in the Pacific...

Registered: 2009-12-10

Posts: 1,087

Website

Re: Dell Inspiron Mini fan stil running

This may or may not work for you, have you tried it?:
http://wiki.archlinux.org/index.php/Fan_Speed_Control

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Philosophy is looking for a black cat in a dark room. Metaphysics is looking for a black cat in a dark room that isn't there. Religion is looking for a black cat in a dark room that isn't there and shouting "I found it!". Science is looking for a black cat in a dark room with a flashlight.

mikicz

Member

Registered: 2010-07-31

Posts: 4

Re: Dell Inspiron Mini fan stil running

Yes, I did... I read wiki before asking. did not helped. pwmconfig says, there are no pwm-cappable sensor modules installed

mikicz

Member

Registered: 2010-07-31

Posts: 4

Re: Dell Inspiron Mini fan stil running

I just found out, that there is some issue with therma zone drivers... when I look to /sys/devices/virtual/thermal/ i see three cooling devices. 0,1 and 2. First two pretends to be procesor cores and cooling status is 0. third says LCD

[root@neutron cooling_device2]# ls -la
total 0
drwxr-xr-x 3 root root    0 Aug  9 17:07 .
drwxr-xr-x 5 root root    0 Aug  9 17:07 ..
-rw-r--r-- 1 root root 4096 Aug  9 17:27 cur_state
lrwxrwxrwx 1 root root    0 Aug  9 17:07 device -> ../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/device:00
-r--r--r-- 1 root root 4096 Aug  9 17:26 max_state
drwxr-xr-x 2 root root    0 Aug  9 17:26 power
lrwxrwxrwx 1 root root    0 Aug  9 17:07 subsystem -> ../../../../class/thermal
-r--r--r-- 1 root root 4096 Aug  9 17:26 type
-rw-r--r-- 1 root root 4096 Aug  9 17:07 uevent

[root@neutron cooling_device2]# cat type 
LCD
[root@neutron cooling_device2]# cat cur_state 
15
[root@neutron cooling_device2]# cat max_state 
15

so far good, but, when I change value in cur_state with

echo 5 > cur_state

it changes backlight intensity of LCD. So it controls not cooling, but backlight of display. And the same for first two. It does not change fan speed, or so, but changes processor speed.

Last edited by mikicz (2010-08-09 15:38:54)

mikicz

Member

Registered: 2010-07-31

Posts: 4

Re: Dell Inspiron Mini fan stil running

well, for now, I know, that the fan running is caused by OSS. I do not know how yet, but for sure I know, that when I do not start OSS, the fan is not running all time.

And, as I "fixed" it, here is how (if anyone cares):

remove /usr/lib/oss directory content
reinstall oss (pacman -S oss)
...
profit

Last edited by mikicz (2010-08-11 18:54:37)