Comment 80 for bug 1778011

Additional:

If I try sudo prime-select intel, this is what I get:

Info: selecting the intel profile
Failed to disable unit: Unit file nvidia-fallback.service does not exist.
Traceback (most recent call last):
  File "/usr/local/bin/prime-select", line 334, in <module>
    switcher.enable_profile(arg)
  File "/usr/local/bin/prime-select", line 124, in enable_profile
    self._trigger_prime_sock()
  File "/usr/local/bin/prime-select", line 183, in _trigger_prime_sock
    sock.connect(self._prime_sock_addr)
FileNotFoundError: [Errno 2] No such file or directory

I don't know what this means.

Best,
Stefan