Hi Krille, Jason,
I spent about a day unsuccessfully trying to install Ubuntu 13.10/12.04 in both UEFI and legacy BIOS mode. In UEFI mode, the hard drive is not detected and in legacy mode, the kernel hangs. I figured regardless of whether UEFI or legacy mode is used, there's going to be an extra step involved, so I decided to stick with UEFI mode.
This website should help:
UEFI - Community Ubuntu Documentation
Basically, I followed the website and left Fast Boot and Intel Smart Response Technology disabled. The system booted the LiveUSB drive with secure boot enabled. Also, ensure that UEFI is checked/enabled in BIOS. Then install Ubuntu in UEFI mode (website has information on how to identify whether LiveUSB is booted with legacy or UEFI mode). After install, reboot using the LiveUSB drive and select "Try Ubuntu". Follow the instructions in the section, "Converting Ubuntu into EFI mode" to download/install the Boot-Repair utility and use it to separate the /boot/efi partition. Afterwards, the UEFI firmware was able to detect and boot Ubuntu 13.10 from the mSATA drive.
