linux-kernel - Re: [2.6.28] Kernel panic after closing lid on HP 2510p

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Message-ID: <20090115025945.GA19472@srcf.ucam.org>
Date:	Thu, 15 Jan 2009 02:59:45 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Martin Michlmayr <tbm@...ius.com>,
	"elendil@...net.nl" <elendil@...net.nl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	fengguang.wu@...el.com
Subject: Re: [2.6.28] Kernel panic after closing lid on HP 2510p

On Thu, Jan 15, 2009 at 10:55:03AM +0800, Zhang Rui wrote:

> DIDL is an IGD OpRegion field, as the Supported Display Devices ID List.
> it's evaluated by the _DOD method when ACPI video driver is loaded.
> And according to the spec, "The graphics driver writes to this field
> once during its initialization"
> if DIDL is not empty, a flag is set and the SMI will not be invoked when
> closing the lid.
> In our tests, this field (DIDL) is set in windows when _DOD is invoked
> while it's not in Linux.
> I can workaround this bug by setting the DIDL manually in AML code.

Oh, huh. Yeah, that sounds plausible. I'll give it a go here tomorrow.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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