prime-select fails without grub

[OlegKrikun]

If grub isn't installed in system prime-select fails =(

sudo prime-select nvidia
-------------------------
Info: selecting the nvidia profile
Traceback (most recent call last):
  File "/usr/bin/prime-select", line 298, in <module>
    switcher.enable_profile(arg)
  File "/usr/bin/prime-select", line 114, in enable_profile
    self._enable_nvidia()
  File "/usr/bin/prime-select", line 147, in _enable_nvidia
    self._grub_path, ['nouveau.runpm', 'video=VGA'])
  File "/usr/bin/prime-select", line 214, in _remove_boot_params
    with open(path, 'r+') as f:
FileNotFoundError: [Errno 2] No such file or directory: '/etc/default/grub'

Ubuntu 18.04
nvidia-prime 0.8.8

imho, prime-select should show warning about kernel options in case without grub and keep working

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Elvis Stansvik (elvstone)]

This is a problem for us as well. We're using Docker as part of our toolchain for creating a file system for a disk image for our product, and need to be able to run "prime-select intel" during the Docker image build, at a time when grub has not been installed yet.

[Vasyl (exposight)]

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