Not OP, but I run elementary OS 5.1.7 Hera, built on Ubuntu 18.04.4 LTS, Linux 5.4.0-65-generic.
Its more stable than it used to be, but the desktop manager still keeps hanging every fortnight or so. Changing the brightness, right after unlocking my laptop is a recipe for getting frustrated, and eventually having to hard restart the computer. Other micro issues pop up every now and then.
Basically every laptop is unsupported or best effort / best luck on Linux (except System 76 and the like.) My brightness control keys use to work or not according to the kernel and the NVIDIA driver versions. I configured two hotkeys to increase and decrease backlightining with X11 and forgot about the original ones. However I never got a crash because of them. Maybe the screen froze a couple of times since Ubuntu 20.04, probably a video card crash (lots of windows.)
Oh I didn't install (on purpose) the NVIDIA drivers in my computer this time around. Last time, the brightness control would stop working, and the GPU would run a 100% of the time my computer was on. Drained battery in about 45 minutes.
Its more stable than it used to be, but the desktop manager still keeps hanging every fortnight or so. Changing the brightness, right after unlocking my laptop is a recipe for getting frustrated, and eventually having to hard restart the computer. Other micro issues pop up every now and then.