The last version of OpenBSD I have been able to install on my Compaq
Prolient DL360 G2 is 4.1.  In all cases I am attempting to boot and
install using the i386 cd4x.iso.  In both cases of attempting to
install 4.2 and 4.3, the installer hard-locks at the end of the dmesg.
 No keyboard input is possible after the lock-up.

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The 4.1 boot into the installer works and the last lines of the dmesg
are as follows:

biomask fbcd netmask ffed ttymask ffef
rd0: fixed, 3800 blocks
rootdev=0x1100 rrootdev=0x2f00 rawdev=0x2f02
erase ^?, werase ^W... <insert rest of control keys here>
(I)nstall, (U)pgrade or (S)hell

...after which I can complete a fresh install

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The 4.2 boot ends like this:

biomask fbcd netmask ffed ttymask ffef
rd0: fixed, 3800 blocks
dkcsum: sd0 matches BIOS drive 0x80
root on rd0a swap on rd0b dump on rd0b

-----------------------------------------------------------

The 4.3 boot ends like this:

biomask fbcd netmask ffed ttymask ffef
rd0: fixed, 3800 blocks
root on rd0a swap on rd0b dump on rd0b

-----------------------------------------------------------

As you can see, with 4.2 and 4.3, the installer never actually starts.
 No amount of time past will produce the '(I)nstall, (U)pgrade...'
prompt.  Any ideas?

Thanks,

don..

P.S.  I attempted verbose boot and the very last line of output is
still always... root on rd0a swap on rd0b dump on rd0b

I also attempted disabling acpi and apm with the same results, as I
found this helped other people with somewhat similar problems
installing, while I was googling for answers.