Unable to install with serial console

[David Aquilina]

I'm seeing this problem with both 5.2.1-RELEASE and the latest
5.3-BETA. Both on AMD64.

The kernel messages come up on the serial console, however it stops at
this point:

md0: Preloaded image </boot/mfsroot> 4194304 bytes at 0xffffffff808e4ba0
ad0: 78533MB <HDS722580VLAT20/V32OA63A> [159560/16/63] at ata0-master UDMA100
ATAPI_RESET time = 50us
acd0: CDRW <AOPEN COM5232/AAH/1.06> at ata1-master UDMA33
Mounting root from ufs:/dev/md0

Which is where I assume sysinstall should be coming up. I'm trying
this method, by the way, only because I'm unable to convince the
system to use my USB keyboard during installation, as I've previously
asked about on the list.

Does anyone have any suggestions? Sysinstall comes up normally if I do
not use the serial console, however it is unusable due to the keyboard
issue.

Help?