User manual

Page 109
PPC-5170GS Flat Panel PC

Enabled DEFAULT
Pointers to the AMI OEMB table are provided in the
RSDT and the XSDT
 Headless Mode [Disabled]
Use the Headless Mode option to update the ACPI FACP (Fixed ACPI Description Table)
to indicate headless operations, i.e. a computer without a monitor, keyboard and mouse.

Disabled DEFAULT
The FACP is not updated to indicate headless mode

Enabled
The FACP is updated to indicate headless mode