Re: [Q] No message from Kernel (Howto start debug?)

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On Thu, Jul 28, 2011 at 03:15:20PM +0200, Arno Steffen wrote:
> Maybe you are so kind to give me a hint:
> 
> Try to migrate from Kernel 33 to 37. Currently I don't see any message after
> 
>   Verifying Checksum ... OK
>    Loading Kernel Image ... OK
> OK
> 
> Starting kernel ...
> 
> From what I understand kernel starts with start_kernel()).
> What is best way to find out which part is failing? At which point I
> do a printk to see what's going on, or at least set a GPIO Pin of the
> processor?
> How to debug without any external tools like JTAG.

try to enable CONFIG_DEBUG_LL and CONFIG_EARLY_PRINTK, then add "debug
earlyprintk" to your command line. See if that helps showing more debug
messages.

-- 
balbi

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