[Fedora-xen] inittab corrupted/serial console broken on Xen-ified kernel?

[Bill Nottingham]

Evan Lavelle (sa212+fcxen at cyconix.com) said: 
> 2 - If I boot into 2.6.21-2952.fc8xen instead, I get all the expected
> serial output up to the end of the boot process, but no login.
>
> When I boot into the xen kernel, inittab is modified, and the
> modification removes the agetty on ttyS0. If I compare the old inittab
> with the new inittab, I get:
>
> 46,47c46
> < # co:2345:respawn:/sbin/agetty xvc0 96 9600 vt100-nav
> < co:12345:respawn:/sbin/agetty ttyS0 115200 vt100
> ---
> >  co:2345:respawn:/sbin/agetty xvc0 96 9600 vt100-nav
>
> In other words, a commented entry was uncommented, and the following
> line was deleted, which explains why I can't log in. This is so bizarre
> that it almost looks like it was done on purpose (was it ? :))
>
> Anyone seen this? Any ideas?

Xen takes over the serial port; it's modifying the line to point
to the xen console device.

Bill