I had an issue where, on an Optimus laptop running linux414 with bbswitch for nvidia-430xx, after the upgrade and switch to nvidia-455xx under the nvidia-intel-prime config, my default renderer was llvmpipe (which is a software renderer) instead of Mesa Intel(R).
I fixed it by
- Ensuring that I only have the
video-hybrid-intel-nvidia-primeandvideo-modesettingconfigs installed inmhwd, uninstalling others - Switching to
linux54
You can read about the path to the fix here: