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My Asus laptop with windows 7 has a very persistent sleep charge technology (it keeps the power on even after the computer shutdown). How can I disable this feature? I don't see anything related to that in the bios.

I have also tried setting the Allow the computer to turn off this device to save power option in the USB Root Hubs' Properties in Device Manager and enabling USB selective suspend in power options - it didn't work.

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  • That doesn't happen on my laptops! What OS are you running? Have you checked the power management settings? If Windows, as a quick test, set your power policy to "High performance" and see if that changes the behavior.
    – Jamie Hanrahan
    Sep 3, 2015 at 10:02
  • I'll check them now. - my laptop is an asus notebook, running windows 7
    – TCN
    Sep 3, 2015 at 10:05
  • I checked it... and the USB selective suspension was activated for both on battery and on power supply. So it must not be that setting. I'm thinking I may have better odds with the motherboard definitions. (I'll have to shutdown and restart in order to check them)
    – TCN
    Sep 3, 2015 at 10:08
  • Ok, all checked. No BIOS options to turn this feature off. I think I'm out of luck this time.
    – TCN
    Sep 3, 2015 at 10:21
  • Try turning the USB selective suspension off.
    – Jamie Hanrahan
    Sep 3, 2015 at 10:23

2 Answers 2

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Firstly, I couldn't understand clearly what you meant but I guess you mean when your computer is shutdown.
Naturally, computers cutoff power being sent to USB ports when it is shutdown or hibernated and in some cases, in sleep mode EXCEPT in certain computers with special features like the SLEEP CHARGE TECHNOLOGY which allows specified USB port(s) to be powered while in sleep mode, shutdown or hibernated.
The SLEEP CHARGE TECHNOLOGY can be configured in either the BIOS setting or in the computer manufacturer's settings software.
You should also try out those options or elucidate more.

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  • I think you understood it perfectly (I appear to lack the vocabulary to describe the problem adequately...).
    – TCN
    Sep 3, 2015 at 14:18
  • My laptop seems to have Sleep Charge Technology and what I want to do is to disable that feature. But I can't find any options in the bios related to the sleep charge.
    – TCN
    Sep 3, 2015 at 14:21
  • I edited the question to make it as clear as possible.
    – TCN
    Sep 3, 2015 at 14:31
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    Then use the manufacturer's settings software.
    – qasdfdsaq
    Sep 3, 2015 at 15:28
  • I have a Asus PC Suite disk. I'll check if it has anything useful.
    – TCN
    Sep 3, 2015 at 17:25
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You can disable hibernate by running powercfg.exe /hibernate off as admin. This will disable it completely (and remove the option from power settings windows as well) until you turn it back on with the same command (replacing 'off' with 'on').

powerconfig/h off in Windows 10 for those curious.

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  • At least, this is the solution to the problem you pose as I interpreted it. Hibernation is generally what keeps your system running even when it is turned off; this is more than likely how Asus is able to run Smart Charge when the system has already been shutdown. Run the command, reboot, test your situation again. If it doesn't work, well, run the command again and turn it back on, move along to the next troubleshoot!
    – MarkZavala
    Sep 26, 2016 at 20:14
  • it has been some time since I posted this thread. It brings back memories. In any case, I came to the conclusion that this bios does not allow for the power to the USB to be controlled programmatically (it's always on unless the computer is both off and disconnected from the external power source). There really was no way around it.
    – TCN
    Sep 27, 2016 at 4:06
  • PS: that was a somewhat old notebook (bought in 2008, made a year and a half or 2 years earlier, so... 10 year old tech essentially, no smart charge included in that model - is now running windows 10. lmao. Asus has some good stuff, never had a single issue with any of their products).
    – TCN
    Sep 27, 2016 at 4:13
  • Tell me about it; I have one from '09, 11in with an i3, and it still runs like a champ. Thank you for responding with your finding - even if it was an old question - now I have another tidbit for future reference.
    – MarkZavala
    Sep 27, 2016 at 15:44

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