I installed Mint 17 64bit Cinnamon on a machine. I used the same instructions as for Mint 16 from the link in my previous post.
I install as user and run the driver install script as sudo.
I then ran CCS and created a new project using the helloworld example for my Tiva 123 LaunchPad.
I then click the bug button and it builds, launches the debugger, connects to the board, loads the program and runs to main().
Which board are you using? Are you by chance connected to a USB 3.0 port? If so maybe try a 2.0 one, I have seen a couple of cases with people having issues with USB 3 (typically on XDS100 though). I also didn't plug in my board until after running the driver install script. If you plugged in before maybe try unplugging it, restart the PC and then plug the board in.
Regards,
John