Originally Posted by chrismurphy
OK that's useless. Spam?
You're pretty hard on yourself
There is no reason to suspect UEFI unless you fail to boot.
Historically (like ~2yrs ago) there was a spate of this problem on x86 laptops, where the computer would re-awaken but the backlight wouldn't come on. It had to do with specific vid drivers IIRC.
You're no noob - hunt the archives, use pm in debug mode, try fussing with the vid interface toggles in /sys