Already tried the i8kutils, but this is just workaround, not a real
solution for this problem. Also I see that however the CPU is on kernel
4.8 quite effective with power management the whole package can't reach
lower than C3 state.
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Dell Inspiron 7559 fans do not shut off once started, even when cool
Status in linux package in Ubuntu:
Running Ubuntu 16.04 on a Dell Inspiron 7559 laptop there appears to
be an issue with the fan control. When I first boot up the machine the
fans are off. However, after the laptop warms up under normal usage,
the fans kick on and then never shut off again. Even when the CPU
cools down to below 35c, the fans will continue to run.
If I suspend the the laptop, and then immediately wake it up again
then fans are once again off, until it warms up again. So
essentially, once the fans start they don't seem to ever shut off.
Fans seem to work normally under Windows 10. They turn on as needed,
and then turn off once the laptop cools down.
I've tried the various BIOS updates that Dell has released, without
success. I am currently running Dell's latest BIOS for this laptop
Below is the output of lm-sensors showing the fans running when the
CPU is at a cool 35c
Adapter: Virtual device
Processor Fan: 1925 RPM
Processor Fan: 2143 RPM
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-28-generic 4.4.0-28.47
ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13
Uname: Linux 4.4.0-28-generic x86_64
USER PID ACCESS COMMAND
/dev/snd/controlC0: bob 1709 F.... pulseaudio
Date: Wed Jul 13 19:18:45 2016
InstallationDate: Installed on 2016-07-13 (0 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
MachineType: Dell Inc. Inspiron 7559
ProcFB: 0 inteldrmfb
root=UUID=0b3dbcf3-0bdb-4c35-9200-7bb303055a81 ro quiet splash vt.handoff=7
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.vendor: Dell Inc.
dmi.board.vendor: Dell Inc.
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.product.name: Inspiron 7559
dmi.sys.vendor: Dell Inc.
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