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I have an IO Gear GS1204G (nice KVM) that I use to control one each of Windows 7 64bit, Ubuntu Linux, Mac, and ChromeOS computers. This KVM emulates the presence of the keyboard at all times, so it shouldn't appear to windows that a device was inserted or removed or anything.

Everything is working perfectly through this setup for the other devices. My only problem is that my keyboard/mouse won't wake the Windows 7 computer from sleep.

A USB keyboard connected directly to the windows 7 machine WILL wake it from sleep with no trouble at all.

Under the advanced power options, I've tried setting "USB selective suspend setting" to Disabled, and I've tried disabling Hybrid sleep.

The motherboard in question is "ASRock Z68 Extreme4 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard" and I haven't been able to find relevant settings in the Bios screen.

Any help or suggestions about how to debug the problem would be appreciated.

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1 Answer 1

This is a typical problem with "emulated" class of KVM switch. There are thousands of different types of keyboard and mouse or USB HID devices (such as touch screen, 3D mouse or drawing tablets) in the market. It's impossible to have single super "emulator" cover all types of devices. So, your emulated KVM switch only can emulator as "standard keyboard" or "standard mouse" no matter what type of devices you plug in to it.

If the power saving/ wake-up system issue really bother you, you may want to look for "DDM" class of KVM switch. Please see the link from: http://en.wikipedia.org/wiki/KVM_switch#Classes_of_USB_KVM_switches

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It looks like DDM is a trademark of ConnectPro, and none of their devices with it do audio or dual link DVI. That means it's not a solution for me. –  DonGar Jan 26 '13 at 20:01
    
Though I'm not sure I can figure out from their documentation what the difference is between emulation and DDM. Is DDM just emulation that's smart enough to copy the source device descriptors and pass along codes that aren't directly understood? –  DonGar Jan 26 '13 at 20:02

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