If lmsensors doesn't see the fans, how about in the bios?  Bios should 
show the rpm there, if not, that sounds like the hardware monitoring 
chip died.  Not exactly the most sophisticated things.

If bios sees it, but os cannot, I'd check there isn't a bios update for 
"feature upgrades" related to acpi monitoring.  Vendor bios acpi 
implementations always leave something to be desired here, and they 
probably had some workaround in place with whatever they shipped it with.

This is where windows laptop vendors always tweak drivers for their 
units, but no such attention from most vendors for linux. This is what 
dell does for their "developer edition" laptops that come with tweaked 
distro installs and their own repos, and others that support linux like 
system76.  As I often find, they don't always "just work" otherwise.

-mb


On 11/24/2016 01:56 AM, herminio.hernandezjr@gmail.com wrote:
> I am gentoo installed on my system76 gazelle laptop. I just got it this week
> and for some reason I cannot control the fan speed.Even when idle the fan
> runs. I installed lm_sensors, however it does not detect the fan (see below).
> Has anyone ran into something similar before?
>
> Thanks!
>
> gentoo-gazelle ~ # sensors
> acpitz-virtual-0
> Adapter: Virtual device
> temp1:        +37.0°C  (crit = +120.0°C)
>
> coretemp-isa-0000
> Adapter: ISA adapter
> Physical id 0:  +37.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 0:         +34.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 1:         +35.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 2:         +36.0°C  (high = +100.0°C, crit = +100.0°C)
> Core 3:         +33.0°C  (high = +100.0°C, crit = +100.0°C)
>
>
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