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Windows 7: USB\ROOT_HUB\ Waking computer.

07 Mar 2015   #21

Windows 8.1

this is not a solution (nor an answer directly related) to your topic, and I am sorry for resuming this old thread.

But since I've run into it as the first result on Google while trying to find a solution to my problem, I'd like any people who will eventually read it, to try other possible procedures too.

So, Usb Root Hub.
I experienced random awakenings from S3 sleep state too.

With device management, I prevented everything, mouse, keyboard, all nics, from reactivating the pc from its sleep state.

I upgraded the BIOS and altered some of its settings (e.g. ehci hand-off), installed more recent chipset drivers and even changed to disabled the USB selective suspend setting in advanced power settings.

But still no changes.

powercfg /lastwake
I found out that one of my usb root hubs was the cause of the last wake;
but it seemed to me, that hub, that it was the root hub connected to the usb mouse port (suspicion proved by evidence when I moved the mouse on purpose during sleep, and the pc woke up).

Then I suddenly remembered I am behind a KVM switch.
I don't know exactly what class my KVM switch belongs to (see KVM switch - Wikipedia, the free encyclopedia), anyway there was an option (via keyboard sequence) to deactivate mouse emulation.

A new HID mice was installed, and now, after having unticked the option in device management for preventing it from waking the computer, everything works OK.


In short,
pay ATTENTION if you are behind a KVM switch:
you may have to disable (if allowed) any available mouse emulation feature before things really work.

My System SpecsSystem Spec

 USB\ROOT_HUB\ Waking computer.

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