Enable or Disable USB Selective Suspend in Windows 11 – Windows Blog by Brink

Enable or Disable USB Selective Suspend in Windows 11

USB selective suspend is the ability to power down and later resume an idle USB device while the computer to which it is attached remains in the working state (S0). For energy-efficient operation—especially on mobile PCs—all USB devices and drivers should support selective suspend. Powering down a device when it is idle, but while the system remains in the S0 state, has the following significant advantages:

  • Selective suspend saves power.
  • Selective suspend can help reduce environmental factors such as thermal load and noise.

The USB selective suspend feature allows the hub driver to suspend an individual port without affecting the operation of the other 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. Direct memory access (DMA) transfers by the host controller to the scheduler can prevent the system’s processors from entering deeper sleep states.

This tutorial will show you how to turn on or off USB selective suspend for a power plan in Windows 10 and Windows 11.

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