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sigorand

Member

From: Poland

Registered: 2011-12-23

Posts: 10

[Solved] Dell 3521 - fan control, lm_sensors, pwmconfig

There's just a few posts about same topic, but none of them doesn't helped me.

At first: I have a Dell 3521 laptop. Few months ago, after running sensors, the system properly shows RPM of the fan, and I can control speed of this.

Few days ago I reinstalled my Arch Linux. I noticed that my fan speed isn't anymore showed at sensors output. Of course I can't control RPMs at this moment - this is pretty annoying.

At this moment, sensors shows this:

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +51.0°C  (high = +87.0°C, crit = +105.0°C)
Core 0:         +44.0°C  (high = +87.0°C, crit = +105.0°C)
Core 1:         +51.0°C  (high = +87.0°C, crit = +105.0°C)

Modules:

sigo@erica ~ $ lsmod | grep coretemp
coretemp               16384  0

sigo@erica ~ $ lsmod | grep i8k
i8k                    16384  0

Last edited by sigorand (2015-08-16 18:02:59)

sigorand

Member

From: Poland

Registered: 2011-12-23

Posts: 10

Re: [Solved] Dell 3521 - fan control, lm_sensors, pwmconfig

I've found the solution.

For most (or all) Dell devices, you need i8kutil, available in AUR.
Above package have optional dependencies: acpi, tcl and tk, available in official repository. You need to install them also for working fan control.

The next step is configuration. This is my config (/etc/i8kutils/i8kmon.conf):

set config(0) {{- 0} -1 45 -1 45}
set config(1) {{- 1} 45 60 45 60}
set config(2) {{- 2} 60 128 60 128}
set config(auto) 1
set config(timeout) 5
set config(unit) C

For more information read i8kmon manual.

The last step is enabling and starting i8kmon daemon:

systemctl enable i8kmon
systemctl start i8kmon

I hope that I helped somebody.

Last edited by sigorand (2015-08-16 18:04:04)