Re: Kernel panic when unpluggin AC adaptor

2010/5/25 Giovanni Trematerra <[e-mail]>:
> On Tue, May 25, 2010 at 5:52 PM, David DEMELIER
> <[e-mail]> wrote:
>> 2010/5/25 Giovanni Trematerra <[e-mail]>:
>>> On Mon, May 24, 2010 at 9:43 PM, David DEMELIER
>>> <[e-mail]> wrote:
>>>> 2010/5/12 Giovanni Trematerra <[e-mail]>:
>>>>> On Fri, May 7, 2010 at 8:33 PM, Demelier David <demelier.david@gmail.=
com> wrote:
>>>>>> Le Vendredi 07 mai 2010 =C3=A0 18:22 +0200, Giovanni Trematerra a =
=C3=A9crit :
>>>>>>> On Fri, May 7, 2010 at 2:08 PM, Demelier David <demelier.david@gmai=
l.com> wrote:
>>>>>>> > Hi,
>>>>>>> > =C2=A0 =C2=A0 =C2=A0 =C2=A0I noticed that pluggin the AC adaptor =
when I boot without it does not
>>>>>>> > =C2=A0 =C2=A0 =C2=A0 =C2=A0panic. It only panic when removing it.
>>>>>>> >
>>>>>>> > =C2=A0 =C2=A0 =C2=A0 =C2=A0Maybe that could help ?
>>>>>>> >
>>>>>>>
>>>>>>> Good to know. The problem lies somewhere when performance state cha=
nge.
>>>>>>> In your case it happens when you remove AC adaptor. Let's hope some=
one on
>>>>>>> acpi@ ml comes up with a good idea.
>>>>>>>
>>>>>>
>>>>>> Okay so for the moment no change, I'll wait for someone with an idea
>>>>>> that could solve my problem. For me because the panic only happens w=
hen
>>>>>> changing profile from ac plugged -> ac unplugged (and not the revers=
e) I
>>>>>> would think it's a cpu related acpi issue.
>>>>>>
>>>>>
>>>>> I looked deeper and it seems to me that when you unplug the AC
>>>>> adapter, acpi_cpu_notify calls acpi_cpu_cx_cst that try to allocate a
>>>>> new cx_ptr->p_lvlx =C2=A0via acpi_PkgGas.
>>>>> If acpi_PkgGas set cx_ptr->p_lvlx to NULL for any reasons you'll have
>>>>> the panic that you reported.
>>>>> A solution would be to set acpi_cpu_hook to NULL so acpi_cpu_idle won=
't call it.
>>>>> I need some time to have a patch because of the possible race between
>>>>> acpi_cpu_notify and
>>>>> acpi_cpu_idle during set acpi_cpu_hook to NULL.
>>>>> if you have time and want panic your system you could try the attache=
d
>>>>> patch, just to be
>>>>> sure that we catch it.
>>>>>
>>>>
>>>> Hi, it paniced today ! I don't know why it randomly panic but it did,
>>>> the backtrace didn't change. There is a picture about the panic :
>>>>
>>>> http://img541.imageshack.us/img541/2773/dsc00388xa.jpg
>>>
>>> What was you trying? acpi_idle5.diff.txt patch?
>>> How did it panic? Unplugging AC adapter?
>>>
>>
>> Hi, I tried this one : lvlx.diff.txt. Yes by unplugging the AC adapter.
>>
>
> This is an old one. Could you try acpi_idle5.diff.txt? I kept you in
> Cc when I sent to
> the list. If you have problems, let me know, I'll resend to you =C2=A0the=
 patch.
>
> Thank you.
>

Hi, it panic'ed with the same backtrace.

Thanks.

--=20
Demelier David
_______________________________________________
[e-mail] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "[e-mail]"