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Thread: ASRock CoreHT Good night (Power) LED under Linux




  1. #1
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    Default ASRock CoreHT Good night (Power) LED under Linux

    Hello,

    I have ASRock CoreHT (Intel).
    I want to control the LED state in Linux.
    I did not find any information regarding the LED attachment... GPIO or anything.

    Does anyone knows how can this be done?

    Regards,
    Alon Bar-Lev.

  2. #2
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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Dear Alonbl,

    If you want to "Good Night LED" function, please kindly adjust "Good Night LED" option under BIOS.
    ( BIOS/ Advanced/ South Bridge Configuration)

    Thanks!

    Have a nice day
    ASRock TSD Emily

  3. #3
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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Quote Originally Posted by ASRock TSD - Emily View Post
    Dear Alonbl,

    If you want to "Good Night LED" function, please kindly adjust "Good Night LED" option under BIOS.
    ( BIOS/ Advanced/ South Bridge Configuration)

    Thanks!

    Have a nice day
    ASRock TSD Emily
    Hi,

    I want to be able to control the led state under Linux.
    When to turn it on and when to turn it off.

    I don't like the "blink" during suspend it burns my eyes... blink blink near TV....

    I want to set it on when powered on and off when suspend.
    There must be a GPIO or something which control this.

    Thanks,
    Alon

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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Anyone? Please.

  5. #5
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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Do you mean that you can do this on other boards but not on this specific board?

  6. #6
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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Hello,

    I have other boards that I can set the state of the led before sleep and the state is maintained during the sleep.

    I just did not find any documentation of how this led is controlled. For sure the BIOS can control the led.... And if the BIOS can, so can the OS.

    I guess I can let the BIOS turn it own during boot, while before going to sleep turn it off.

    But I need information, don't want to start reverse engineer, I don't think there is any secret in this issue...

    Thanks!

  7. #7
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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Again a bit unclear! What I infer is that you can find such settings inside the bios on some other boards but not on your board; then; You want to do by software (OS) instead of firmware (BIOS) on this board. Yes?

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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Quote Originally Posted by bahram_alinezhad View Post
    Again a bit unclear! What I infer is that you can find such settings inside the bios on some other boards but not on your board; then; You want to do by software (OS) instead of firmware (BIOS) on this board. Yes?
    Hello,

    In short: Yes.

    In long: I will start from the beginning...
    First I want to say that I love the ASRock (Intel) device.
    I've looked at many devices and this is one of the few devices I found that is has fully Intel chipset, support FullHD and can run Linux without any none free opened source component.
    I had to add a wireless remote control that is HID complaint and not use the internal IR one. The wireless remote control is working great including wakeup device from sleep.
    The only major downside is the fan noise... I would have paid some more for solid cooling.
    And I have the annoying led issue... which I discuss here.

    There are two settings of the Good night led in BIOS:
    1. Always off.
    2. Power off: off, Power on: on, Sleep: blink

    Option 1 disadvantage is that you can never know if device is turned on or not.

    Option 2 disadvantage is that during device sleep (when unused which is most of the time), and as device resides near TV, the blink led is annoying.

    So I have to choose between forgetting to turn off device (option 1) or be annoyed by blinking led (option 2).

    For future I recommend dual light led for power: blue: on, red: sleep.

    But for now all I want is to have: Power off: off, Power on: on, Sleep: off

    As far as I know BIOS does not support this mode, so I would like to try and control the led my-self from the OS (Software).
    However, I do not have enough information about how this led is wired into the board, and to which device.
    Having this information will probably enable me to write a simple linux module to control the led.

    Regards,
    Alon Bar-Lev.

  9. #9
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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Hello
    Regarding the information you provided, AFAIK this forum is not at the level you looking for. ACPI features are provided by linux kernel and its behavior is under kernel control. I guess you have to re-compile your kernel with desired changes performed inside the source; Now, where is that setting inside the source? You have to discuss in a forum related to kernel.org.

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    Default Re: ASRock CoreHT Good night (Power) LED under Linux

    Quote Originally Posted by bahram_alinezhad View Post
    Hello
    Regarding the information you provided, AFAIK this forum is not at the level you looking for. ACPI features are provided by linux kernel and its behavior is under kernel control. I guess you have to re-compile your kernel with desired changes performed inside the source; Now, where is that setting inside the source? You have to discuss in a forum related to kernel.org.
    Thank you for your response.

    In order to go to kernel.org (If I need help) I first need to understand how this led is wired.
    This is what I am asking...

    Is the led is available via some GPIO controller, and which?
    Is the led is available via some BIOS service, and which?
    It can also be controlled using SMBus.
    Or I2C.
    Or any other alternative.

    Without this platform specific information I won't be able to progress.

    Is this the forum for the platform specific information or there is another alternative?

    Thanks.

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