I didn't see this thread until today, so I went and checked the Linux installs I have to see if I had the same problem.
I don't run Mint 17 but figured I would check anyways.
CF-19MK4 running Mint 16 XFCE - no reboot problem
CF-29MK4 running Navigatrix 0.5 - no reboot problem
CF-29MK4 running Mint 16 XFCE - no reboot problem
CF-29MK4 running SolydX - had to use GRUB_CMDLINE_LINUX_DEFAULT="reboot=pci quiet splash"
CF-29MK4 running SolydX - no reboot problem after applying fix
I don't have any CF-18s left, they are all gone to a good home.
Thanks you kode-miner, Jeff, Cleve and Mobus for figuring this out.