I have GalliumOS installed (a Ubuntu variant), and it's been working fine for a while (probably been ~ 1 month since a fresh install). Some time ago (probably at least 2 weeks ago), some update (I think to GRUB2) required I select an install location/something along those lines. I chose something like
/dev/sda7 potentially (I really can't remember the specific place), which may very well be the issue. Since then, whenever I boot I got a GRUB screen asking me to pick from 1 of ~4 options for booting, which was annoying but I never got around to trying to fix it.
Yesterday, I was unable to boot to my install, with an issue very similar to this one. Essentially, the screen would print two lines: The first saying "SeaBIOS (misc version numbers I can copy down if needed)", and the second saying "Booting from Hard Disk". Here, the system hangs.
I made a GalliumOS liveUSB successfully, and am able to boot off of that (when it's plugged in, GRUB gives me two options, the SSD and the USB. The SSD still hangs, the USB works fine). How can I go about repairing the SSD's GRUB thing? I've found this which details how to do it with an Ubuntu liveUSB - will this work (provided I make a Ubuntu liveUSB) even though my install on my computer is GalliumOS?