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From: Alexander Motin <mav@FreeBSD.org>
Date: Tue, 6 Dec 2011 09:12:11 +0000 (UTC)
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Subject: svn commit: r228305 - head/share/man/man4
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Author: mav
Date: Tue Dec  6 09:12:11 2011
New Revision: 228305
URL: http://svn.freebsd.org/changeset/base/228305

Log:
  Mention that Cold Presence Detection feature used for hot-plug detection
  when interface power management is enabled.

Modified:
  head/share/man/man4/ahci.4

Modified: head/share/man/man4/ahci.4
==============================================================================
--- head/share/man/man4/ahci.4	Tue Dec  6 08:08:52 2011	(r228304)
+++ head/share/man/man4/ahci.4	Tue Dec  6 09:12:11 2011	(r228305)
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd December 2, 2011
+.Dd December 6, 2011
 .Dt AHCI 4
 .Os
 .Sh NAME
@@ -90,9 +90,9 @@ Some controllers, such as ICH8, do not i
 Because of artificial entering latency, performance degradation in modes
 4 and 5 is much smaller then in modes 2 and 3.
 .Pp
-Note that interface Power Management is not compatible with
-device presence detection.
-A manual bus reset is needed on device hot-plug.
+Note that interface Power Management complicates device presence detection.
+A manual bus reset/rescan may be needed after device hot-plug, unless hardware
+implements Cold Presence Detection.
 .It Va hint.ahcich. Ns Ar X Ns Va .sata_rev
 setting to nonzero value limits maximum SATA revision (speed).
 Values 1, 2 and 3 are respectively 1.5, 3 and 6Gbps.