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From: Alexander Motin <mav@FreeBSD.org>
Date: Mon, 2 Jan 2012 19:45:30 +0000 (UTC)
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Subject: svn commit: r229311 - stable/8/share/man/man4
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Author: mav
Date: Mon Jan  2 19:45:30 2012
New Revision: 229311
URL: http://svn.freebsd.org/changeset/base/229311

Log:
  MFC r228305:
  Mention that Cold Presence Detection feature used for hot-plug detection
  when interface power management is enabled.

Modified:
  stable/8/share/man/man4/ahci.4
Directory Properties:
  stable/8/share/man/man4/   (props changed)

Modified: stable/8/share/man/man4/ahci.4
==============================================================================
--- stable/8/share/man/man4/ahci.4	Mon Jan  2 19:44:34 2012	(r229310)
+++ stable/8/share/man/man4/ahci.4	Mon Jan  2 19:45:30 2012	(r229311)
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd December 2, 2011
+.Dd December 6, 2011
 .Dt AHCI 4
 .Os
 .Sh NAME
@@ -91,9 +91,9 @@ 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.