Le samedi 30 mars 2013 14:13:53 David Demelier a écrit :
> Le mercredi 27 février 2013 18:51:09 Andriy Gapon a écrit :
> > on 27/02/2013 17:22 kron said the following:
> > > Hi,
> > > 
> > > I have a Dell notebook (Latitude E6530) on which I track
> > > 9-STABLE. It served excellently until mid-Jan when it started
> > > to panic a few times a week or so:
> > > 
> > > Fatal trap 12: page fault while in kernel mode
> > > cpuid = 3; apic id = 03
> > > fault virtual address     = 0x10116
> > > fault code                = supervisor read data, page not present
> > > instruction pointer       = 0x20:0xffffffff802bc360
> > > stack pointer             = 0x28:0xffffff848f6db390
> > > frame pointer             = 0x28:0xffffff848f6db3c0
> > > code segment              = base 0x0, limit 0xfffff, type 0x1b
> > > = DPL 0, pres 1, long 1, def32 0, gran 1
> > > processor eflags  = interrupt enabled, resume, IOPL = 0
> > > current process           = 2199 (conky)
> > > trap number               = 12
> > > panic: page fault
> > > cpuid = 3
> > > 
> > > Before the panics kernel used to emit messages like:
> > > ACPI Error: No object attached to node 0xfffffe00094a51c0
> > > (20110527/exresnte-138)
> > > ACPI Error: Method execution failed [\_SB_.BAT0._UID] (Node
> > > 0xfffffe00094a51c0), AE_AML_NO_OPERAND (20110527/uteval-113)
> > 
> > This looks very much like a heisenbug reported several times here.
> > E.g.:
> > http://lists.freebsd.org/pipermail/freebsd-acpi/2012-December/007962.html
> > 
> > > I suspected it started with a BIOS update (A07 -> A09).
> > > Following the handbook, I took a look at acpidump. Sad to say,
> > > it all was Greek to me, I could't even compile it back using
> > > iasl (35 Errors). However, while skimming it I noticed names
> > > of many versions of Windows and in addition to that, "Linux".
> > > Just to try, I put hw.acpi.osname="Linux" to /boot/loader.conf.
> > > Since that I've never get the panic again (for ~3 weeks).
> > > I hope this is not just a coincidence.
> > 
> > It very well could be.
> > 
> > > Maybe this experience can help somebody else.
> > > 
> > > If any of ACPI developers wants to play with the problem
> > > I can provide more info (sorry, no crashdump, was not enabled),
> > > do tests, etc.
> > 
> > Please at least enable printing of a stack trace.
> > Better do get the crash dump.
> > 
> > P.S. I suspect that the issue we are discussing with hps in this mailing
> > list could be related to this problem.
> 
> About me, I've currently added the following to my /boot/loader.conf:
> 
> debug.acpi.disabled="acad cmbat"
> 
> And it solved my panics but unfortunately I must say bye to the battery
> information.
> 
> Regards,

By the way, may be this is related? :)

http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/173408

Cheers,

-- 
David Demelier
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