Comment 52 for bug 546091

From the manufacturer website (LSI)
they provide the kernel modules and initrd image for us to try,
here are the links:

http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/entry_line/megaraid_sas_9240-8i/index.html

under the support and downloads tab,
I have try as per their instruction inside the tarball, and had a success detecting the harddisk.

hope this helps someone out there want to install ubuntu with this card.