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

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Message-ID: <20090115020311.GA18740@srcf.ucam.org>
Date:	Thu, 15 Jan 2009 02:03:11 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Martin Michlmayr <tbm@...ius.com>, elendil@...net.nl,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [2.6.28] Kernel panic after closing lid on HP 2510p

On Wed, Jan 14, 2009 at 04:26:03PM -0800, Andrew Morton wrote:

> It'd be a very special BIOS bug if it can reach out and make the kernel
> oops.

Lid actions typically trigger SMI code, so it's entirely capable of 
destroying CPU state in such a way that the kernel falls over (and 
probably even in ways that cause the kernel to turn green, emit pleasing 
warbling noises or invade neighbouring pieces of hardware). In this case 
it seems to be SMP specific - the system's entirely stable in UP mode. 
It's greatly vexing.

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