Re: [PATCH 0/5] hwmon: (nct6683) Fan control for ASRock B850 Steel Legend WiFi

From: Alwyn Kik

Date: Tue Nov 10 2026 - 18:12:17 EST


Hi Johan!

I have the same board in my system so I wanted to help out:
ASRock B850 Steel Legend WiFi, BIOS 4.10 (02/10/2026), NCT6686D EC
firmware 1.0 build 10/29/24.

Tested the whole series twice: on 05441d697f7f (7.4-rc1 + 132), and on
7.4-rc2, both without issues.

Patch 2/5 needed git am -3 because the docs changed in 04f4079ee61a
("hwmon: (nct6683) Add more MSI boards to list of tested boards").
The driver probes without force, and pwmN_enable reads 2 after probe.

Manual control works on CPU_FAN1/2, AIO_PUMP and CHA_FAN1/3 with
fanN tracking pwmN.
CHA_FAN2 is untested (fan cable too short) but by elimination it should
be fan5/pwm5.

Also tested patch 4/5; a fan in manual mode at pwm 255 went back to EC
control on rmmod. pwm6_enable read 2 after reload.

I didn't test suspend/resume, or the retry path in 1/5 (I never caught
a lost write).

Is a v2 planned with the requested changes? Happy to test it!

PS: this is my first time on the kernel mailing list, pointers welcome.

For the whole series:

Tested-by: Alwyn Kik <alwyn@xxxxxx>