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Date: Tue, 05 Mar 2013 15:13:01 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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To: kron <kron24@gmail.com>
Subject: Re: panics due to buggy ACPI in Dell Latitude E6530?
References: <512E24CD.9090404@gmail.com> <512E397D.1070406@FreeBSD.org>
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on 03/03/2013 20:26 kron said the following:
> #5  0xffffffff806abc53 in calltrap () at exception.S:228
> #6  0xffffffff802bc850 in AcpiOsAcquireObject (Cache=0xfffffe00093a14a0)
>     at /usr/src/sys/contrib/dev/acpica/utilities/utcache.c:310
> #7  0xffffffff802bf481 in AcpiUtCreateInternalObjectDbg (
>     ModuleName=0xffffffff8071c1a6 "dsutils", LineNumber=703,
> ComponentId=64,.
>     Type=1) at /usr/src/sys/contrib/dev/acpica/utilities/utobject.c:437

Did this panic happen even with hw.acpi.osname="Linux" or did you revert that to
reproduce the panic?

In either case, could you please try the following patch (it is against recent
stable/9) ?
http://people.freebsd.org/~avg/OsdSynch-9.diff

P.S. this is not a final version of the patch, but rather a work in progress.
-- 
Andriy Gapon