[coreboot] Serial Console only starts after reset

Stefan Reinauer stepan at coresystems.de
Tue Jun 15 15:39:25 CEST 2010


On 6/15/10 2:25 PM, Joseph Smith wrote:
>
>
> On Tue, 15 Jun 2010 14:13:24 +0200, Stefan Reinauer
> <stefan.reinauer at coresystems.de> wrote:
>   
>> On 6/15/10 1:38 PM, Joseph Smith wrote:
>>     
>>> Hello,
>>> I have a strange thing happening on the i810 port I am working on. When
>>>       
> I
>   
>>> power the board on i do not get any serial console from coreboot. VGA
>>>       
>> turns
>>     
>>> on and works fine, but no serial output. The strange part is if I push
>>>       
>> the
>>     
>>> reset button, serial console comes up and works fine until the next
>>>       
> power
>   
>>> off. The SuperIO is SMSC LPC47M102 and I am using
>>>       
>> superio/smsc/smscsuperio.
>>     
>>> Just wondering if anyone else has encountered this before. Any help /
>>> thoughts would be appreciated.
>>>
>>>       
>> Your Super IO chip is not initialized correctly. Compare the register
>> output after reset and from cold start.
>>     
> You mean with superiotool?
>
>   
That might already be too late

>> Did you run the same coreboot image already when you pressed the reset
>> button, or did you initially boot with the BIOS?
>>
>>     
> Yes, same coreboot image.
>   

So booting Linux fixes the issue? Does serial console in linux work on a
cold boot?





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