diff --git a/src/etc/etc.amd64/sysctl.conf b/src/etc/etc.amd64/sysctl.conf
index e69de29b..c06bca89 100644
--- a/src/etc/etc.amd64/sysctl.conf
+++ b/src/etc/etc.amd64/sysctl.conf
@@ -0,0 +1,4 @@
+#machdep.allowaperture=2	# See xf86(4)
+#machdep.apmwarn=10		# battery % when apm status messages enabled
+#machdep.apmhalt=0		# 1=powerdown hack, try if halt -p doesn't work
+#machdep.kbdreset=1		# permit console CTRL-ALT-DEL to do a nice halt