Kontron AM4022 uEFI BIOS - Manual (Page 20)

Main Setup AM4022 uEFI BIOS
Page 14 ID 1052-1333, Rev. 1.0
2.6.1.3 USB3.0 Support
This function is used to enable USB3.0 support.
Default setting: Enabled
2.6.1.4 XHCI Hand-Off
This function is used to enable a workaround for operating systems without XHCI Hand-Off
support. The XHCI ownership change should be claimed by the XHCI driver.
Note: It is recommended to leave this function at the default setting.
For operating systems without USB3.0 support this function must be left at the de-
fault setting.
Default setting: Enabled
2.6.1.5 EHCI Hand-Off
This function is used to enable a workaround for operating systems without EHCI Hand-Off
support. The EHCI ownership change should be claimed by the EHCI driver.
Note: It is recommended to leave this function at the default setting.
For operating systems without USB2.0 support this function must be left at the de-
fault setting.
Default setting: Disabled
SETTING DESCRIPTION
Disabled Use this setting to disable USB3.0 support.
Enabled Use this setting to enable USB3.0 support.
SETTING DESCRIPTION
Disabled Use this setting to disable XHCI Hand-Off support.
Enabled Use this setting to enable XHCI Hand-Off support.
SETTING DESCRIPTION
Disabled Use this setting to disable EHCI Hand-Off support.
Enabled Use this setting to enable EHCI Hand-Off support.