what is the best way to turn devices such as screen, cdrom, usb ports, (possibly unused bus) on and off during run time.
i would prefer a raw, straight forward method apposed to some sort of management software because i would like to control devices power status in custom services/ scripts/ bins thanks in advance!
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turning devices on and off to save power
Re: turning devices on and off to save power
Have you done any research of your own prior to asking here? If so, please share so we can help with what you found.
ASRock H77 Pro4-M i7 3770K - 32GB RAM - Pioneer BDR-209D
Re: turning devices on and off to save power
If your question were even a tad bit more specific there could be some interesting discussion, but unfortunately, as is it is just too vague for there to be anything interesting to say. Many periferials can be turned off and others can be forced into low power states. It is also possible to estimate approximately how much power a device uses with tools like powertop
Re: turning devices on and off to save power
Whilst I agree with this, I gave it some thought and some answers may be obvious given the vagueness of the question:pylkko wrote:unfortunately, as is it is just too vague for there to be anything interesting to say.
Modern optical drives support something called Zero Power. This basically means that when it's not in use, it automatically turns itself off so it uses no power. This is a hardware feature, and I don't think this can be accomplished via software.
As for the screen: a screensaver can deal with that.
And as for USB ports, surely if you unplug something from it, the USB port is not consuming power any more.
ASRock H77 Pro4-M i7 3770K - 32GB RAM - Pioneer BDR-209D
Re: turning devices on and off to save power
Code: Select all
shutdown -h now
Code: Select all
systemctl poweroff