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Date:	Wed, 21 Mar 2012 12:40:30 +0100
From:	Knut Petersen <>
To:	Linus Torvalds <>
CC:	Andrew Morton <>,
	Stephen Hemminger <>,
	"David S. Miller" <>,,
	Jared <>,,,
Subject: [REGRESSION][PATCH] Fix an old sky2 WOL regression

Sky2 Wake on LAN is broken since February 2010 on a number of systems.
Yes. More than two years.

We know about the problem and the cause since October 2010
(Bugzilla bug #19492). It´s commit 87b09f1f25cd1e01d7c50bf423c7fe33027d7511.

Stephen, David: You signed off that commit.

Andrew: You called it a regression in October 2010.

It has been proposed to revert the commit that caused the problem.
Nothing happened.

I proposed to re-establish the old code for dmi_match()ed systems.
Without success.

Now it is proposed to re-establish the old code as a configuration option.
If nothing happens again I will propose a module parameter ;-)

Stephen, I don´t want to be a pain in the neck, and it is not my intention
to offend you by my "attitude". But I simply cannot understand why this
know regression is not fixed. The bit we talk about is documented,
and in fact it was set for a number of kernel versions unconditionally.
Nobody complained about ruined hardware or minor problems.

The systems affected are old enough that no manufacturer cares about
them, but they are still quite usable for a lot of jobs (kernel 3.3 compile
time here is below 15 minutes).

If there is a problem in the kernel and if we do know an easy solution,
that solution should be commited to the kernel, no matter what is written
in some random documentation, no matter if we could blame some
BIOS authors. That´s the way Linux works - at least I thought so.


View attachment "0001-Fix-an-old-sky2-WOL-regression.patch" of type "text/x-patch" (2760 bytes)

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