netdev - Re: Kernel crash with sky2

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Message-ID: <20100518110128.GK9007@amd.com>
Date:	Tue, 18 May 2010 13:01:28 +0200
From:	"Roedel, Joerg" <Joerg.Roedel@....com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: Kernel crash with sky2

Hi Stephen,

On Mon, May 17, 2010 at 03:22:36PM -0400, Stephen Hemminger wrote:
> On Mon, 17 May 2010 20:52:28 +0200
> Joerg Roedel <joerg.roedel@....com> wrote:
> > I experience the following crash with 2.6.34 in the sky2 code on my
> > laptop when I plug off the lan-cable and then plug-off the power cable
> > and switching to battery. It does not happen with acpi=off.
> 
> So you have a busted BIOS that powers off the device.

Yeah you are right, its a BIOS issue. I tried to find out how the OS is
informed about the device taken away. But none of the hotplug
drivers or enabling acpi debug showed anything here. I wonder how this
is done in the "other" operating system. Or how the device could be
re-enabled, plugging the wires back doesn't help. Very weird.
Anyway, I found a BIOS option to disable this behavior and now things
work unpatched. Thanks for your help.

	Joerg

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