Arch Linux

dedhart

Member

Registered: 2006-07-02

Posts: 123

Fan doesn't work [solved]

Sometime around kernel 2.6.18 I noticed the fan wasn't running anymore, at the time I found it a relief because previously it was running constantly and it was kinda noisy. So I didn't really think anything of it until a heavy load just sorta made my whole system stall and run at extremely slow speed. Top showed a 99% cpu useage by a program called kacpid. Googling gave me the following answer from linuxquestions.org:
http://www.linuxquestions.org/questions … p?t=213429
So I installed acpi and acpid but I still got the following:

$ modprobe fan
FATAL: Module fan not found.
$ modprobe thermal
FATAL: Module thermal not found.

I tried Lm sensors, I got the following detected:

$ sensors
smsc47m192-i2c-0-2d
Adapter: SMBus I801 adapter at 1880
+2.5V:     +0.00 V  (min =  +3.29 V, max =  +3.28 V)   ALARM
VCore:     +0.00 V  (min =  +2.99 V, max =  +2.98 V)   ALARM
+3.3V:     +0.00 V  (min =  +2.17 V, max =  +4.38 V)   ALARM
+5V:       +0.00 V  (min =  +6.62 V, max =  +6.64 V)   ALARM
+12V:      +3.06 V  (min = +15.94 V, max = +15.94 V)   ALARM
VCC:       +3.32 V  (min =  +4.38 V, max =  +4.25 V)   ALARM
+1.5V:     +0.03 V  (min =  +1.99 V, max =  +1.99 V)   ALARM
+1.8V:     +0.00 V  (min =  +2.35 V, max =  +2.09 V)   ALARM
Chip Temp: +43.0°C  (low  =   -65°C, high =    -1°C)  ALARM
CPU Temp:  +37.0°C  (low  =    -1°C, high =    -1°C)  
Sys Temp: -128.0°C  (low  =    -1°C, high =    -1°C)  FAULT
vid:      +1.475 V  (VRM Version 9.0)

and the fans still aren't working. I'm not sure what to try next, can anyone please tell me what to do to get my fans working again? I have a HP pavilion a305w desktop pc w/ a trigem motherboard if it helps the motherboard specs are here

Last edited by dedhart (2007-04-13 10:21:51)

sl

Banned

From: uk

Registered: 2007-04-04

Posts: 42

Website

Re: Fan doesn't work [solved]

only thin i can suggest is to add those modules to your mkinitcpio.conf if they aren't already ...
and or boot from the falback img adn try again

dedhart

Member

Registered: 2006-07-02

Posts: 123

Re: Fan doesn't work [solved]

Well something is wrong, I'm using knoppix and the fan works fine here. so I run 'modprobe -l fan' and I get this output:
/lib/modules/2.6.19/kernel/drivers/acpi/fan.ko
but then I look in /dev/hda3/lib/modules/2.6.20-ARCH/kernel/drivers/acpi and I see no module called fan.ko is there another package I need to download for this module?

dedhart

Member

Registered: 2006-07-02

Posts: 123

Re: Fan doesn't work [solved]

Well my first thought was to just copy the modules into /dev/hda3/lib/modules/2.6.20-ARCH/kernel/drivers/acpi but modprobe failed to load the modules anyhow, looks like they have to be compiled as modules from the kernel (and frankly I see no reason why they would be compiled otherwise) I'm starting to think this is a bug in the arch kernel configuration.

dedhart

Member

Registered: 2006-07-02

Posts: 123

Re: Fan doesn't work [solved]

Thats exactly what it was, I recompiled the kernel with ACPI suport modules compiled as modules and got the fan working again. I believe I should inform whoever maintains the stock arch kernel of this as I believe it is compiled incorrectly.