CastorisCausa

Personal blog and hacks by Raymundo Cassani

Fan speed control for AORUS15G

More a side project than a need, I wanted to control in Linux the fan modes (the relationship between temperature and fan speed) in my 2020 Gigabyte AORUS 15G KB, it should apply to similar models. The code for this project can be found in: https://github.com/rcassani/p37-ec-aorus15g.

Fortunately, I did not have to start the project from scratch as there was previous work done for other Gigabyte laptops: P37Xv5 and P37Wv5, and Aero14 and Aero15.

The first step was to install RWEverything to be able to monitor the changes in the embedded controller (EC) registers while changing the fan modes. There are six fan modes available in the AOURUS Control Center. Three are hard coded: Normal, Quiet and Gaming, and the other three can be configured: AutoMax, Fix and Deep control. All these modes seem to be controlled by different combinations of five single bits (0x08.6,0x06.4,0x0D.0,0x0D.7 and 0x0C.4), following the behaviour in this table:

Fan mode \ Bits:: 0x08.6-- 0x06.4-- 0x0D.0-- 0x0D.7-- 0x0C.4--
Normal 0 0 0 0 0
Quiet 1 X X X X
Fix * 0 1 X X X
AutoMax ^ 0 0 1 X X
Deep control 0 0 0 1 X
Gaming 0 0 0 0 1

* For Fix mode, define the fan speed %s in registers 0xB0 and 0xB1
^ For AutoMax mode, define the maximum fan speed %s in registers 0xB0 and 0xB1


Fan modes: Normal, Gaming and Quiet

Lastly, the set-fan-mode bash script was wrote to facilitate setting the EC registers according with the desired fan mode:

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$ set-fan-mode --help                                                   ✘ 1
Usage: set-fan-mode fan-mode [fan-speed]
  fan-mode  : <Fan mode to set>
  fan-speed : <Fan speed in % for "fix" and "automax" modes>

Fan modes: normal | quiet | gaming | deepcontrol | fix | automax
See: https://github.com/rcassani/p37-ec-aorus15g

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