Before I go making unnecessary work for myself, I thought I’d run a proposed plan of action past the experts here, as well as the reasons for it.
Goal: Re-install Ubuntu Maté 20.04.x on my ThinkPad Carbon X1 — but this time in secure-boot/UEFI mode — in order to take advantage of the ability to update firmware. HERE’S THE FIRST PLACE TO CORRECT ME. Currently I can’t do any firmware updates from within Ubuntu, though the software capable of doing so is available to launch. I’ve come to the (mis?)understanding that this firmware-update feature only works on systems taking advantage of secure-boot/UEFI.
Plan: Assuming that firmware-feature/UEFI-association assumption is valid, as I prepare to make the change, the thought came to me that I could back up all system files, programs installed, etc., using Timeshift. Restoring from Timeshift afterwards could save me a lot of re-installing and tweaking, etc. At least, I’m hoping so…
Possible Glitch: …but this thought came to me as well: What if Timeshift works “too well” and overwrites some settings needed by the new secure/UEFI boot process? Can anyone tell me what will happen?
Safety-First Side Note: My NVMe has a separate /home partition, which shouldn’t be affected by a reinstall (but the /home partition is backed up to a now-offline external drive, just in case; I always believe in paying “Murphy” his insurance premium).
Thanks in advance for any guidance on this project.