Spent a good chunk of time last night & this morning (post-windstorm) trying to fix a broken boot loader on my desktop. (Pro-tip: when power’s flaky, make sure the computer is *off*, not just asleep.)
I figured out pretty quickly that UEFI was missing an entry for the Linux install, but since manually creating boot entries in UEFI isn’t something you do very often, it took me forever to find the right steps to fix it.
Blog post for future troubleshooting: https://hyperborea.org/journal/2021/01/fix-uefi/