Related GRUB interaction code was removed as part of https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1778011 fix, released in 0.8.8.1
Related GRUB interaction code was removed as part of https:/ /bugs.launchpad .net/ubuntu/ +source/ nvidia- prime/+ bug/1778011 fix, released in 0.8.8.1