Bug#396169: linux-image-2.6.18-1-xen-686: Does not support PC serial ports

[Brian May <bam@debian.org>]

>>>>> "Brian" == Brian May <bam@debian.org> writes:

    Brian> I believe this is related to the following configuration option:

    Brian> snoopy:~# less /boot/config-2.6.18-1-xen-686 | grep CONFIG_XEN_DISABLE_SERIAL
    Brian> CONFIG_XEN_DISABLE_SERIAL=y

Passing the following option to the Linux kernel appears to have
solved this issue:

xencons=off

Also if I pass the following parameter to the hypervisor, Linux will
show only 2 serial ports instead of 4 (I believe my motherboard has
chipset support for 2) - still I bit confused where the other two come
from.

console=vga

My guess is that the CONFIG_XEN_DISABLE_SERIAL has no effect when
serial I/O is compiled as a module.

(note: I haven't yet tested this by talking to a real serial device,
just looked at /dev/ttyS* and dmesg).
-- 
Brian May <bam@debian.org>