Document newly added loader tunables "hw.acpi.install_interface" and

"hw.acpi.remove_interface".

1 files changed, 21 insertions, 1 deletions

diff --git a/share/man/man4/acpi.4 b/share/man/man4/acpi.4
index 056aadd..adaf6cb 100644
--- a/share/man/man4/acpi.4
+++ b/share/man/man4/acpi.4
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 12, 2010
+.Dd October 26, 2010
 .Dt ACPI 4
 .Os
 .Sh NAME
@@ -224,6 +224,26 @@ Try increasing this number if you get the error
 .Qq Li AE_NO_HARDWARE_RESPONSE .
 .It Va hw.acpi.host_mem_start
 Override the assumed memory starting address for PCI host bridges.
+.It Va hw.acpi.install_interface , hw.acpi.remove_interface
+Install or remove OS interface(s) to control return value of
+.Ql _OSI
+query method.  When an OS interface is specified in
+.Va hw.acpi.install_interface ,
+.Li _OSI
+query for the interface returns it is
+.Em supported .
+Conversely, when an OS interface is specified in
+.Va hw.acpi.remove_interface ,
+.Li _OSI
+query returns it is
+.Em not supported .
+Multiple interfaces can be specified in a comma-separated list and
+any leading white spaces will be ignored.  For example,
+.Qq Li FreeBSD, Linux
+is a valid list of two interfaces
+.Qq Li FreeBSD
+and
+.Qq Li Linux .
 .It Va hw.acpi.reset_video
 Enables calling the VESA reset BIOS vector on the resume path.
 This can fix some graphics cards that have problems such as LCD white-out