Kernel panic when unpluggin AC adaptor

[Rui Paulo]

On 5 May 2010, at 08:40, Demelier David wrote:

> On Wed, May 05, 2010 at 01:19:45AM +0100, Rui Paulo wrote:
>> On 4 May 2010, at 21:38, Kostik Belousov wrote:
>> 
>>> On Tue, May 04, 2010 at 10:27:23PM +0200, David DEMELIER wrote:
>>>> 2010/5/4 Kostik Belousov <kostikbel at gmail.com>:
>>>>> On Tue, May 04, 2010 at 06:35:52PM +0200, David DEMELIER wrote:
>>>>>> Good news ! It worked, check the picture here :
>>>>>> 
>>>>>> http://img63.imageshack.us/img63/4244/dsc00361g.jpg
>>>>> 
>>>>> Please try adding code fragment like this:
>>>>>       if (cx_next->p_lvlx == NULL)
>>>>>               printf("Going to panic.\n");
>>>>> to  dev/acpi/acpi_cpu.c:acpi_cpu_idle() function, right before
>>>>>   CPU_GET_REG(cx_next->p_lvlx, 1);
>>>>> line and see if it prints the message immediately before the panic.
>>>>> 
>>>> 
>>>> Yes it does at the beginning of the kernel panic.
>>> 
>>> Ok, so the point of panic is found, it is NULL cx_next->p_lvlx resource.
>>> With the data in hand, I recommend you to ask on acpi@ (added a Cc:)
>>> about the cause and possible solution.
>> 
>> I don't remember the details, but I've seen this before. Does your CPU Cx levels change when you plug/unplug the AC adapter?
>> 
> 
> May  4 15:48:32 Melon power_profile: changed to 'economy'
> May  4 15:48:35 Melon power_profile: changed to 'performance'

I wasn't asking about the profiles. Show us the output of sysctl dev.cpu with and without the AC cord plugged in.

Regards,
--
Rui Paulo