USB 3.0 peripheral works at 2.0 speeds after the release of sleep, or after a reboot

After that my computer wakes from sleep, or after a reboot, sometimes my device USB SuperSpeed, my USB 3.0 device, works faster a device high-speed USB, a USB 2.0 device.  Other times, it works as expected.

It sounds like your device passes from a host USB controller 3.0, an eXtensible host controller (XHCI), a USB 2.0, a controller EHCI (Enhanced Host) host controller.  To validate, when your device is running more slowly than expected, ensure that it is connected to a USB 3.0 port.  Open the Device Manager and see "devices by connection".  Find your USB 3.0 device and see what kind of host controller it is connected to.  If it is connected to an EHCI host controller, it will only work on high speed.

To resolve this issue, you will need an update of the BIOS of your PC OEM.  Please contact them and ask for an update.

Tags: Windows

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