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2. Advanced Menu
USB Configuration
Legacy USB Support
The item allows you to enable Legacy USB support. AUTO option disables legacy support if no USB
devices are connected. DISABLE option will keep USB devices available only for EFI applications.
Options: Enabled (Default) / Disabled / Auto
XHCI Hand-off
This is a workaround for OSes without XHCI hand-off support. The XHCI ownership change should
be claimed by XHCI driver.
Options: Disabled (Default) / Enabled
USB Mass Storage Driver Support
The item enables or disables USB Mass Storage Driver Support.
Options: Enabled (Default) / Disabled
USB transfer time-out
The time-out value for Control, Bulk, and Interrupt transfers.
Options: 20 sec (Default) / 1 sec / 5 sec / 10 sec
Device reset time-out
The item sets USB mass storage device Start Unit command time-out.
Options: 20 sec (Default) / 10 sec / 30 sec / 40 sec
Device power-up delay
Maximum time the device will take before it properly reports itself to the Host Controller.
“Auto” uses default value: for a Root port it is 100ms, for a Hub port the delay is taken from Hub
descriptor.
Options: Auto (Default) / Manual
Note
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The following items appear only when you set the Device power-up delay function to [Manual].
