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AleXoundOS

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From: Russia

Registered: 2009-07-18

Posts: 31

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No fan speed control on Gigabyte 8PE800-RS

Hello,
I have installed lm_sensors and after some tweakings a got the sensors working. But the pwmconfig doesn't make any changes to the actual fan speed during the tests. I tried to do it manually like:

echo 0 > /sys/class/hwmon/hwmon1/device/pwm1

but the speed didn't change. I tested my fan on other motherboard and Arch controlled the speed well.

lm_sensors uses the it87 module, but with 2 tweakings.
I needed to set the parameter in the /etc/modprobe.d/modprobe:

options it87 fix_pwm_polarity=1

And to set an option in the kernel since I've recently updated the kernel to 2.6.31.5-1. With this kernel I have these strings in the dmesg ouptut:

ACPI: I/O resource it87 [0x295-0x296] conflicts with ACPI region IP__ [0x295-0x296]
ACPI: This conflict may cause random problems and system instability
ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver

This ACPI conflict is overrided by the kernel option, but I have also read that it is dangerous:

acpi_enforce_resources=lax

Here are some output of pwmconfig:

Found the following devices:
   hwmon0 is acpitz
   hwmon1/device is it8712

Found the following PWM controls:
   hwmon1/device/pwm1
   hwmon1/device/pwm2
   hwmon1/device/pwm3

Giving the fans some time to reach full speed...
Found the following fan sensors:
   hwmon1/device/fan1_input     current speed: 1102 RPM
   hwmon1/device/fan3_input     current speed: 0 ... skipping!

Any ideas how to get the control of the fan? Or may be it is unreal on this motherboard?

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http://code.google.com/p/bwapi/