Attaching Serial Console

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I am trying to bring up a serial console on a guest started by qemu-kvm.  When the guest is started, I get a grub window and issue the following commands:

Startup command:
/usr/libexec/qemu-kvm -hda /home/winterfi/ios/ios-1.img -cdrom /home/winterfi/ios/ios.iso -m 2048 -boot d

Grub window:
serial --unit=0 --speed=9600 --word=8 --parity=no --stop=1
terminal serial console
kernel /boot/ngma-l3is-m console=tty0 console=ttyS0,9600n8
boot

At this point the serial output does not show up in the grub window.   If I start the guest with the -nographic option, the grub window does not show up at all.  Does anyone know of a way to correctly attach the serial console to the guest.  The same image works correctly in a Xen HVM, where the console output shows up in the window which launched the guest.

Thanks

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