Corsair Comander Core: lights flash with every update

[arch-user-france1]

The RGB lights flash once per request (eg. liquidctl status).

Additional information about the system:

• Operating system and version: Manjaro Linux
• Liquidctl installation method: yay
• version: 1.8.1

[jonasmalacofilho]

Cc: @ParkerMc

[jonasmalacofilho]

I'm pretty sure this is a known problem, but it seems we still didn't have an issue open for it. Thanks for reporting it.

[ParkerMc]

That is correct. It is unknown at the moment if it fixable, but it wouldn't hurt to keep an issue open for now to track it.
Quick background, it happens when we "wake up" the controller, that puts it in software mode and somewhere in that it turns off the leds that get turned back on when it falls back to hardware mode.
It is possible that the issue will go away for all but the first time if we copy the hardware mode RGB to the software RGB, but it will likely restart the animation.

[arch-user-france1]

Do you mean if I instruct liquidctl to control the RGB leds it won't happen? Sadly liquidctl doesn't support the CC core LEDs at the moment but I'm glad somebody is working on the CC core.

liquidctl set 0 color fading "hsv(0,80,100)" "hsv(180,80,100)"                                                                                                                      
ERROR: operation not supported by driver for Corsair Commander Core (experimental)

[ParkerMc]

No, even once we implement the RGB for the commander core in liquidctl this issue will still be there. There are a few possible other options to fix this, but that needs some experimentation.

[arch-user-france1]

When do you think will it get fixed? I see the LEDs flashing because the computer is under the desk :(
Is it easy to contribute to that? Coolero updates the fan speed all... half seconds? The LEDs flash every half second :(

[ParkerMc]

There is currently no path to fixing this as liquidctl only supports hardware mode.

[jonasmalacofilho]

On Linux, specifically, and if someone writes the kernel driver for it, a hwmon driver for this device could be a solution: it would both keep device in software mode, as well as already provide status information in a convenient form.

(Liquidctl can be made to fetch info from hwmon, when thats's available... we're already doing that on other devices that have those kernel drivers).

[jonasmalacofilho]

Triage: closing as, like ParkerMc said, there's currently no path to fixing this in liquidctl.

[Viktini]

Would this affect software that puts the lights in software mode? Apparently OpenRGB supports the Commander Core controllers so I thought I'd ask.

[arch-user-france1]

It would not, I think.

[ParkerMc]

Would this affect software that puts the lights in software mode? Apparently OpenRGB supports the Commander Core controllers so I thought I'd ask.

I also implemented the OpenRGB controller. And no it will not. But the OpenRGB controller has to always be running.