Lippert Cool SpaceRunner-LX800 Technical Manual page 41

The Power Management menu gives control over supported power down modes.
Note:
Miscellaneous Configuration controls various other features
TME-104P-CSR-LX800-R1V5.doc
Some Linux versions may require "acpi=force" as a kernel boot
parameter to make use of ACPI.
Rev 1.5 35 (44)