It's really interesting to google that motherboard (MSI 0A7C)
The first hit is your post in Ubuntu forums
and there are only 62 posts and only yours with gutsy in it.
The rest is mostly in non english pages, but the second hit indicates a problem with SATA, but this is an older kernel.
Furthermore all MSI mobos for AMD have a part number beginning with K, so this is an OEM mobo specially for HP which makes it really hard to find something out. Quite often these are stripped down versions...