Chapter 4: BIOS Settings
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You can use this screen to select options for the USB Configuration. Use the up and down <Arrow> keys to
select an item. Use the <Plus> and <Minus> keys to change the value of the selected option. The settings
are described on the following pages.
Feature
Options
Description
Legacy USB Support
Enabled
Disabled
Auto
Enables Legacy USB support.
Auto
option disables legacy support if no USB
devices are connected;
Disabled
option will keep USB devices
available only for EFI applications.
EHCI Hand-off
Enabled
Disabled
This is a workaround for OSes without EHCI
hand-off support. The EHCI ownership change
should be claimed by EHCI driver.
USB Mass Storage
Driver Support
Enabled
Disabled
Enables or disables USB Mass Storage Driver
Support.
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
1 sec
5 sec
10 sec
20 sec
USB mass storage device Start Unit command
time-out
