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Chapter 4: AMI BIOS
USB Settings
The following will be displayed:
•
USB Devices - this displays a list of the detected USB devices.
Legacy USB Support
Select Enabled to support onboard legacy USB devices. Select Auto to disable
legacy support if there are no legacy USB devices present. Select Disable to have
all USB devices available for EFI applications only. The options are Enabled,
Disabled and Auto.
XHCI Hand-Off
This is a work-around solution for operating systems that do not support XHCI
(Extensible Host Controller Interface) hand-off. The XHCI ownership change should
be claimed by the XHCI driver. The settings are Enabled and Disabled.
EHCI Hand-Off
This item is for operating systems that do not support Enhanced Host Controller
Interface (EHCI) hand-off. When this item is enabled, EHCI ownership change will
be claimed by the EHCI driver. The settings are Enabled and Disabled.
XHCI Mode
This feature handles the operation mode for the XHCI (Extensible Host Controller
Interface) controller. The settings are Smart Auto, Auto, Enabled, and Disabledl.
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