 USB Selective Suspend - Turn On or Off
How to Turn On or Off "USB Selective Suspend" for Idle USB Devices  Information The USB selective suspend feature allows the hub driver to suspend an individual USB port without affecting the operation of the other USB ports on the hub. Selective suspension of USB devices is especially useful in portable computers, since it helps conserve battery power. Many devices, such as fingerprint readers and other kinds of biometric scanners, only require power intermittently. Suspending such devices, when the device is not in use, reduces overall power consumption. More importantly, any device that is not selectively suspended may prevent the USB host controller from disabling its transfer schedule, which resides in system memory. DMA transfers by the host controller to the scheduler can prevent the system's processors from entering deeper sleep states, such as hibernate.
This will show you how to turn on or off USB selective suspend to automatically power down idle USB devices in Windows 7 and Vista. For more information, see: USB Selective Suspend (Windows Driver Kit) Here's How: 1. Open the advanced power settings for your selected power plan. (see screenshot below)
2. To Turn On USB Selective SuspendA) Expand USB settings and USB selective suspend setting, set the drop down menu setting to Enabled, and click on OK. (see screenshot below)
NOTE: This is the default setting.
B) Go to step 4.
3. To Turn Off USB Selective SuspendA) Expand USB settings and USB selective suspend setting, set the drop down menu setting to Disabled, and click on OK. (see screenshot below)
4. Close the Edit Plan Settings window. (see screenshot below step 1)
That's it,
Shawn |  Published by | | Administrator Join Date: Oct 2008 Location: Texas Posts: 37,287 | |
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Selective removal of SP1? 
