[Bug 1775717] Re: CPU/GPU Fans suddenly go 100% RPM on Asus ROG G752VT

I've kept both, will give it a try soon.

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

Status in linux package in Ubuntu:
Incomplete
Status in thermald package in Ubuntu:
New

Bug description:
After upgrading from Ubuntu 16.04 to 18.04, I've noticed that CPU and
GPU fans suddenly go full throttle. It doesn't seem to depend on
temperature, could happen when 32 °C reported, sometimes the laptop
can work for day or two without this issue, but eventually it happens.
The only way to stop fans is to power off the laptop, power on (fans
go 100% at this point again), power off during BIOS splash screen and
power on again. Seems to happen more often after waking up from a
sleep.

Things tried:

Upgrading BIOS to latest available on ASUS site to the date of
writing. No change.

asus-fan kernel module (https://github.com/daringer/asus-fan). Detects
both fans and shows correct speed in /sys/class/hwmon/*/fan{1,2}*, but
does not seem to control it and does not prevent going full throttle.

4.17.0 kernel from Ubuntu mainline builds. Doesn't seem to affect the
issue.

Userspace fan control software (https://github.com/hirschmann/nbfc).
Can control speed of both fans to the point where they go full
throttle, after that has no effect on them.

---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: whale 3068 F.... pulseaudio
 /dev/snd/controlC0: whale 3068 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=ada9b595-bbf2-40a3-8575-5908492bb969
InstallationDate: Installed on 2014-10-20 (1333 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64+mac (20140722.2)
MachineType: ASUSTeK COMPUTER INC. G752VT
NonfreeKernelModules: nvidia_modeset nvidia wl
Package: linux (not installed)
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic root=UUID=f6509d56-6183-464c-90bb-9c3be2c8abdf ro quiet splash acpi_backlight=vendor vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-23-generic N/A
 linux-backports-modules-4.15.0-23-generic N/A
 linux-firmware 1.173.1
Tags: bionic
Uname: Linux 4.15.0-23-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio cdrom dip docker lpadmin plugdev sambashare sudo tty video
_MarkForUpload: True
dmi.bios.date: 06/29/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: G752VT.304
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: G752VT
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrG752VT.304:bd06/29/2017:svnASUSTeKCOMPUTERINC.:pnG752VT:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG752VT:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: G
dmi.product.name: G752VT
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

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