Openrgb - motherboard interface unresponsive after update

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1

I just updated the system and among other small issues Openrgb seems to have lost control over a set of fans connected to one ARGB connector of the motherboard. I noticed it because before the update I was able to turn off all RGB lighting while now said fans stays on in what it seems their default rainbow lighting.
Openrgb also gives a warning popup

Screenshot_20250814_173733
Screenshot_20250814_1737331460×1226 126 KB

I gave it a try doing

sudo pacman -S sudo libi2c-dev                                                                 
warning: sudo-1.9.17.p1-1 is up to date -- reinstalling
error: target not found: libi2c-dev

Then

sudo modprobe i2c-dev
sudo modprobe i2c-piix4

I restarted the system but those LEDs are still on.
Any suggestions?

2

The message told you that the command didn’t work - and nothing was done
(except reinstalling sudo)

You asked to (re)install sudo and libi2c-dev.
sudo was reinstalled as requested, but not the second one - because there is no such package as libi2c-dev

What exists is this:

pacman -Ss i2c
extra/i2c-tools 4.4-2

The rest is in kernel - here on my VM it looks like this:

lsmod | grep i2c
i2c_i801               45056  0
i2c_smbus              20480  1 i2c_i801
i2c_mux                16384  1 i2c_i801

A very crude search for what is available would be:
grep /drivers/i2c/i2c /lib/modules/6.12.41-1-MANJARO/modules.dep
(adapt for your kernel version)

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3

i2c_dev is a kernel module that is not loaded by default; therefore it must be enabled manually.

See:

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