On 21/08/2012 18:46, Chris Jones wrote:
> I've just been bringing up to date a variant of the Balloon 3 software
> build in the menuconfig2 branch. I'm using kernel version 2.6.39.4. I've
> updated my patches and the kernel builds fine, but when I try to boot it
> (as zImageInitrd) I get no console output. The last thing I see is
> 'Uncompressing Linux...done, booting the kernel.'.
>
> The kernel is definitely running because I can see LED activity
> including the heartbeat, so all is not broken.
>
> I seem to remember that there was some trick to this in the past, but I
> can't recall what it was and haven't found anything in the Wiki.

Answering my own question, I think I've cracked it - in addition to the 
PXA UART support, my kernel also has 8250 UART support (I have some on a 
daughter board). I'd got the 8250 UART support compiled in and it seemed 
to be messing things up. Rebuilding it as a module brings my console 
output back.

Chris
-- 
Chris Jones - chris@martin-jones.com
Martin-Jones Technology Ltd c/o Element Energy Ltd
Twenty Station Road, Cambridge, CB1 2JD, UK
Phone +44 (0) 1223 655611 Fax +44 (0) 870 112 3908