On 12/26/07, Siva Prasad [off-list ref] wrote:

Hi,

I am really interested in finding out how kernel knows about device
nodes and how the whole thing work. This is as part of my debugging
effort on 8641D based PowerPC board.

* It all started with the problem of "not printing" any thing that comes
from ramdisk (echo and printf statements), while kernel printk's work
perfectly fine.
* Ramdisk is also executing fine, just that prints are not coming out of
serial. I can see the execution of various user programs with a printk
in sys_execve() routine. Ramdisk has all the required files like
/dev/console, /dev/ttyS0, etc.

Does adding console=ttyS0,baud to the kernel boot command line fix it?

-- 
Jon Smirl
jonsmirl@gmail.com