diff --git a/share/man/man4/acpi_video.4 b/share/man/man4/acpi_video.4
index 49443d7c600e..156db56ad7e0 100644
--- a/share/man/man4/acpi_video.4
+++ b/share/man/man4/acpi_video.4
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd March 3, 2004
+.Dd November 8, 2004
 .Dt ACPI_VIDEO 4
 .Os
 .Sh NAME
@@ -49,7 +49,7 @@ or
 .Va tv :
 .Bl -tag -width indent
 .It Va hw.acpi.video. Ns Ao Ar device Ac Ns Va .active
-Current state of the device.
+Current state of the output device.
 .It Va hw.acpi.video. Ns Ao Ar device Ac Ns Va .levels
 List of supported brightness levels.
 .It Va hw.acpi.video. Ns Ao Ar device Ac Ns Va .brightness
@@ -81,3 +81,9 @@ driver was written by
 .An Taku YAMAMOTO Aq taku@cent.saitama-u.ac.jp .
 This manual page was written by
 .An Mark Santcroos Aq marks@ripe.net .
+.Sh BUGS
+Some systems only perform output switching via SMM even though they export
+the proper information via ACPI.
+On such systems, the proper hotkeys or OEM driver (for example,
+.Xr acpi_toshiba 4 )
+must be used instead.