Hi Christopher,

> 1) Regarding the use of non-default kernel parameter:
> acpi_backlight=vendor
>
> Is this required for something? If you boot without this parameter does this 
> change anything?

I've added acpi_backlight=vendor to kernel parameters because once the
laptop didn't restore screen backlight after plugging AC power back. It
seems to be completely different story, the fan issue appeared way
before this parameter was added.

> 2) If you remove the nvidia proprietary drivers, does this provide a
WORKAROUND?

This one I have to test. Will post back when I get some results.

> 3) If you remove the 3rd party software "asus-fan" and "nbfc" is this
still reproducible?

Yes, the issue started before. Presence of this software is a result of
my (fruitless) attempts to find a workaround.

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https://bugs.launchpad.net/bugs/1775717

Title:
  CPU/GPU Fans suddenly go 100% RPM on Asus ROG G752VT

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