Posting from Mint on my other machine. Seems kind of cool. Will possible set this one up for dual boot.
Interdasting...
You could try some of these suggestions...
http://forum.thinkpads.com/viewtopic.php?f=45&t=107675
http://forums.lenovo.com/t5/X-Series-ThinkPad-Laptops/X230-Booting-from-USB-problem/td-p/936473
Mint is kind of nice. I also have a machine running Ubuntu 13.04 and another running Cent OS6. Production servers running either RHEL or NetBSD.
Cent seems the most “functional” for some of the bashing around I do. Ubuntu’s insistence upon Unity is still aggravating.
Fedora is kind of pretty, but doesn’t seem to have the straight up functionality that Cent has.