panics due to buggy ACPI in Dell Latitude E6530?

[kron]

On 2013/03/05 14:13, Andriy Gapon wrote:
> 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?

Yes, it was with hw.acpi.osname="Linux". It seems to be useless
so I've just removed it.

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

Applied.

BTW, the crashes use to be signalized beforehand - there can
be more than 1 hour between the first kernel error messages
("ACPI Error: No object attached") and a crash. Is there
anything useful I can milk from the soon-to-be-dead system
if I get a chance?

BR
Oli