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SubjectRe: Dell Latitude E6440 & i8k
On Fri, 16 May 2014 21:23:02 +0200, Pali Rohár wrote:
> So is not there any documentation? I think that Dell released
> some SMM/BIOS code... But I'm not sure about it.

I don't know either. But even with some SMM/BIOS code, it doesn't tell
you which sensors are present on which machines, nor what they
correspond to, nor what scaling factors need to be applied.

> > (...)
> > Load the i8k driver with fan_mult=1.
>
> Looks like now it reports more plausible value for fan. When fan
> is at low it reporting between 3000 - 3100 RPM.
>
> > Add the following to /etc/sensors.d/i8k.conf:
> >
> > chip "i8k-virtual-0"
> >
> > label fan2 "Left Fan"
> > ignore temp4
>
> And this fixing output from sensors program.
>
> $ sensors
> i8k-virtual-0
> Adapter: Virtual device
> Left Fan: 3088 RPM
> CPU: +54.0°C
> temp2: +57.0°C
> temp3: +40.0°C
>
> But Right Fan name is still present in kernel sysfs:
>
> $ grep "" /sys/class/hwmon/hwmon1/*
> /sys/class/hwmon/hwmon1/fan2_input:3091
> /sys/class/hwmon/hwmon1/fan2_label:Right Fan
> /sys/class/hwmon/hwmon1/name:i8k
> /sys/class/hwmon/hwmon1/pwm2:128
> /sys/class/hwmon/hwmon1/temp1_input:56000
> /sys/class/hwmon/hwmon1/temp1_label:CPU
> /sys/class/hwmon/hwmon1/temp2_input:57000
> /sys/class/hwmon/hwmon1/temp3_input:40000
> /sys/class/hwmon/hwmon1/temp4_input:127000

The drivers sets default labels in sysfs, the libsensors configuration
files lets you override these defaults with your own labels.

--
Jean Delvare
SUSE L3 Support
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