Hi Wolfgang,
On 18 March 2014 09:03, Wolfgang Denk wd@denx.de wrote:
What exactly did you pass in the kernel command line - just "console=", i. e. without a value? Did you try passing a valid device name instead, like "console=null"?
Apologies for hijacking this thread.
If I remember, fixup_silent_linux ensures that 'console=' is present in the kernel arguments (i.e. it will replace console=/dev/ttyS0 (or similar) with console=).
I think preferred behavior for this may be to instead leave any 'console' arguments as they are and instead ensure that 'quiet' or 'loglevel=1' is present instead. There are two motivations for doing this - the first is that when using a lower loglevel you still get suppressed kernel output - but you also get any errors. Thus if something goes wrong you'll see why rather than wonder if U-Boot even started the kernel. The second is that I've seen a few times in the past where setting console to nothing (console=) results in strange behavior (it once increased boot time). After all we want a console we just don't want to use it as much. I can provide a patch for this if you think you may take it?
Thanks,
Andrew Murray