First of all i'm sorry if my english is not the best, i'm really tryin'

I have some R610 and R710 (idrac6) machines running Ubuntu 12.04 precise and I am trying to make a console redirection.
I can access the idrac through ssh but when I try to do "console com2" it's just hang until i hit ^\ I tried almost every guide i saw,
most of them are for grub1 (i have grub2) and none of them worked for me, sometimes ubuntu boot successfully but the console com2 not working and sometimes it's stuck on the boot and I can only ssh and fix the changes. (the console of course not working)

Someone tried to do that and can help me with the configuration?
Thank you very much