To be complete, it won't get to grub without going through the boot menu - even if the disk is the only option in the boot menu. (It's annoying enough that I have to hit F10 every time I boot that I never allowed it to finish booting, though it might have.)
I'm using Linux Mint (the latest), installed off a USB disk, booting from an mSATA drive. There are no other drives in the system and I've turned network booting off. Windows is not involved anywhere.
The Question: how can I boot Linux from a GPT-formatted mSATA disk on this motherboard?
(I'm now reinstalling, having re-formatted the drive MBR/msdos in hopes that this will work, so I'm mostly interested academically. I'm not done setting the build up, though, so I can reformat and reinstall to try things if that'd be useful.)
Edit: I should also mention that either a) the drive came MBR-formatted from the factory or b) the Mint installer formatted the disk MBR. I'm not really certain which. When I noticed this in the first install, I changed the partition table to GPT, and thus our story begins.