Re: I2C bus can not find sensors since kernel 2.6.18

On Sun, Apr 29, 2007 at 12:59:33PM +0800, Wang Xu wrote:
Anyone met similar case?

I have a ASUS M2Ne Laptop, which has Intel ICH4 (i2c-i801) SMBus.

With 2.6.16 and earlier 2.6 kernel, it could find max6657 sensor
and install lm90 module. the sensor result are:
[snip good result]
But under 2.6.18 and 2.6.20 kernel, no sensors could be found,
I enable the debug option of 2.6.20 kernel, and found the following
error message of i2c bus:
| PCI: Unable to reserve I/O region #5:20@e800 for device 0000:00:1f.3
| i801_smbus 0000:00:1f.3: Failed to request SMBus region 0xe800-0xe81f
| i801_smbus: probe of 0000:00:1f.3 failed with error -16


My only box with sensors is my new Athlon with Asus M2N-SLI Deluxe AM2.
I had to use Etch when it was testing since Sarge wouldn't boot it.
Alas, I don't know if a 2.6.16 kernel would have found the sensors but
the .18 does not.

OTOH, I have all my fans controlled by the MB and a smart PSU
(CoolerMaster iGreen 600). When the fans (all 8 case fans) go into high
gear, I can hear them from anywhere in the house. Beats a little 'beep'
from sensord :)

Doug.


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