Asus Z9NA-D6C User Guide - Page 87
USB Configuration, Legacy USB Support [Enabled], EHCI Hand-off [Disabled]
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4.4.7 USB Configuration Aptio Setup Utility - Copyright (C) 2011 American Megatrends, Inc. Advanced USB Configuration USB Devices: 1 Drive, 2 Hubs Legacy USB Support EHCI Hand-off [Enabled] [Disabled] Enabled 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. USB hardware delays and time-outs USB transfer time-out [20 sec] Device reset time-out [20 sec] Mass Storage Devices: USB Ports Configuration →←: Select Screen ↑↓: Select Item Enter: Select Item +/-: Change Opt. F1: General Help F2: Previous Values F5: Optimized Defaults F10: Save & Exit ESC: Exit Version 2.14.1219. Copyright (C) 2011 American Megatrends, Inc. Legacy USB Support [Enabled] This item enables or disables Legacy USB device support. Configuration options: [Enabled] [Disabled] [Auto] EHCI Hand-off [Disabled] This is a workaround for OSes without EHCI ownership change should be claimed by EHCI driver. Configuration options: [Disabled] [Enabled] USB Hardware Delays and Time-outs USB transfer time-out [20 sec] This item sets the time-out value for control, bulk, and interrupt transfer. Configuration options: [1 sec] [5 sec] [10 sec] [20 sec] Device reset time-out [20 sec] USB mass storage device Start Unit command time-out. Configuration options: [10 sec] [20 sec] [30 sec] [40 sec] ASUS Z9NA-D6 4-27