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Date: Thu, 06 Nov 2008 13:56:16 -0500 (EST)
From: Len Brown <lenb@kernel.org>
Subject: Re: 2.6.28-rc2-mm1: multiple BUG: scheduling while atomic: swapper,
 first in acpi_idle_enter_simple, then fbcon has problems
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> > ...kernel contains experimental version of HP accelerometer driver and
> > new HP acclerometer LED, but hopefully they are not causing this?
> > 
> 
> The trace is a bit of a mess, but we first hit problems around
> acpi_idle(), so I'd be suspecting acpi, x86 or sched-type changes.

try "idle=poll" to run none of the ACPI idle code.
or "idle=halt" to just flirt with the idle code.

-Len