On Wed, 16 Sep 2015, Cole Robinson wrote:

> Unfortunately I couldn't get anything else extra out of xen using any of these
> options or the ones Major recommended... in fact I couldn't get anything to
> the serial console at all. console=con1 would seem to redirect messages since
> they wouldn't show up on the graphical display, but nothing went to the serial
> log. Maybe I'm missing something...

That should be console=com1 so you have a typo either in this message or 
in your tests.

> sync_console gives an extra message but that's all I could see. Is
> console=hvc0 correct for a KVM guest, or is that only going to work for
> xen-on-xen ? I tried console=ttyS0 as well but it didn't make a difference

It is hvc0 to send it to xen and thus onto the console you specified 
above. You can get some early debug messages of the kernel with 
earlyprintk=xen and "log_lvl=all guest_loglvl=all" are recommended at 
http://wiki.xenproject.org/wiki/Debugging_Xen for the xen hypervisor line.

        Michael Young
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