Page 58
Feature
Options
Description
USB Module Version Info
only
USB Devices
Info only
X Drive, X Keyboards, X Mouse, X Hubs
Legacy USB Support
Enabled
Disabled
Auto
Enables 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 and
setup.
XHCI Hand-off
Enabled
Disabled
This is a workaround for OSes without XHCI hand-off support. The XHCI
ownership change should be claimed by the XHCI OS driver.
EHCI Hand-off
Enabled
Disabled
This is a workaround for OSes without EHCI hand-off support. The EHCI
ownership change should be claimed by the EHCI OS driver.
USB Mass Storage Driver Support
Enabled
Disabled
Enable/Disable USB Mass Storage Driver Support.
PCH USB Configuration
Submenu
USB hardware delays and time-outs:
Info only
USB transfer time-out
1 sec
5 sec
10 sec
20 sec
The time-out value for Control, Bulk, and Interrupt transfers
Device reset time-out
10 sec
20 sec
30 sec
40 sec
USB mass storage device Start Unit command time-out.
Device power-up delay
Auto
Manual
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 100 ms, for a
Hub port the delay is taken from Hub descriptor.
Mass Storage Devices
Info only
List current USB max stroge device.
7.3.5.1.
Advanced > USB > PCH USB Configuration
Feature
Options
Description
USB Precondition
Disable
Enable
Precondition work on USB host controller and root ports for faster
enumeration.
XHCI Mode
Smart Auto
Auto
Enable
Disable
Manial
Mode of operation of xHCI controller.
XHCI Idle L1
Enabled
Disabled
Enable or disable XHCI Idle L1.\n XhciIdleL1 can be set to disable for LPT-
LP Ax stepping to workaround USB3 hot plug will fail after 1 hot plug
removal.
BTCG Disable
Enable
Enable / Disable trunk clock gating.
USB Ports Per-Port Disable Control
Disable
Enable
Control each of the USB ports (0~13) disabling.
7.3.6.
Advanced > Network
