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Switch off Sapphire Nitro+ 5700 xt rgb leds (Linux)

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  • Switch off Sapphire Nitro+ 5700 xt rgb leds (Linux)

    My Vega56 died on me and I got a replacement: the Nitro+. I'd like to turn off /disable the leds on it but it seems one can only do that with their software on Windows. I run Manjaro. Does anyone know how to switch off those leds under Linux?

    Cheers!

  • #2
    You can turn the LEDs on/off by setting/clearing the LED_DISPLAY bit in the SMU feature mask. It's enabled by default. You can disable it by removing that bit. E.g.,
    https://paste.centos.org/view/08314ab1

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    • #3
      Whoa, I was hoping for something I could run on the cmd line. Is this file part of the kernel, then? Meaning, I compile my own and make that change from the diff?

      Is there no kernel parameter maybe that I could run? I'd rather not have to compile a kernel for every update I get automatically...

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      • #4
        There are no interfaces to control this at runtime.

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        • #5
          Do those Nitro+ cards no longer come with physical RGB buttons? The Polaris cards I know had a button on the PCB that allowed some degree of control for the lights.

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          • #6
            Originally posted by agd5f View Post
            There are no interfaces to control this at runtime.
            Are the interfaces different in Linux from Windows? In theory couldn't OpenRGB control this? Last time I checked TriXX from Sapphire is sending some i2c messages to the GPU.


            I would love to help with testing but I'm not sure I can investigate this on my own since I have no experience with i2c or AMD drivers.

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            • #7
              As far as I know, there is only an LED on/off switch via smu feature bit I mentioned earlier. The AIBs can implement other board specific features using the i2c bus which is probably what you are seeing.
              Last edited by agd5f; 05-28-2020, 05:43 PM. Reason: typo

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              • #8
                Originally posted by agd5f View Post
                As far as I know, there is only an LED on/off switch via smu feature bit I mentioned earlier. The AIBs can implement other board specific features using the i2c bus which is probably what you are seeing.
                thanks, in that case it might be worth it to investigate it more. I'm not sure if it's possible to replace these ADL2 calls with something equivalent though.

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