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

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Date:	Thu, 15 Jan 2009 02:21:06 +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 06:15:42PM -0800, Andrew Morton wrote:
> On Thu, 15 Jan 2009 02:03:11 +0000 Matthew Garrett <mjg59@...f.ucam.org> wrote:
> > 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.
> 
> Does it always crash in the same way?

Not in my experience. Sometimes it falls over in the ACPI parsing code, 
but sometimes the backtrace is nonsense and the IP is in the middle of 
nowhere. I've now got a working 2510p again, so maybe I'll have time to 
look at this on the way to LCA.

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