IEI Integration NANO-9452 v4.02 - Manual (Page 130)

NANO-9452 EPIC Motherboard
Page 112
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No Disables the ACPI support for the OS. This selection should
be disabled if the OS does not support ACPI

Yes D EFAULT Enables the ACPI support for the operating system. This
selection should be enabled if the OS does support ACPI
6.3.5.1 General ACPI Configuration
Use the General ACPI Configuration menu (BIOS Menu 9) to select the ACPI state
when the system is suspended.
BIOS Menu 9: General ACPI Configuration [Advanced\ ACPI Configuration]
 Suspend Mode [S1(POS)]
Use the Suspend Mode option to specify the sleep state the system enters when it is not
being used.