Had the same problem but the kernel8 thing just broke all my games (black screen whenever I tried to load any game).

The solution that worked for me was to add these lines to my retroarch config file:

parallel-n64-cpucore = "cached_interpreter"
mupen64plus-next-cpucore = "cached_interpreter"

as per this thread: https://www.reddit.com/r/raspberry_pi/comments/18pus3g/raspberry_pi5_retropie_n64_how/

For context, I just got my Pi 5 8GB and running full Raspberry PI OS. Installed retropie and all the emulators from source.

@stuckinthe90s I figured it out. I had same problem on recalbox. For some reason switching to rice. Running the game and let it crash again then switching the video ratio to 16:9 let it run makes it work, but then everything is lagging. Then switch everything back the way it were and everything runs smoothly. I don't know why. It just worked and I can play again. It was also on a door opening