I think we need better detection code upstream, since the NVIDIA 470
driver will have full Wayland (and accelerated XWayland) support, and
the udev rule should take this into account.

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https://bugs.launchpad.net/bugs/1925238

Title:
  [nvidia-prime] switches between xorg and wayland session

Status in ubuntu-drivers-common package in Ubuntu:
  New
Status in ubuntu-drivers-common source package in Hirsute:
  New
Status in ubuntu-drivers-common source package in Impish:
  New

Bug description:
  I have noticed this on a hirsute install from today's RC media
  (20210420) with ubuntu-drivers-common 1:0.8.9.1.

  The first boot is always xorg, and nvidia mode is selected.

  After that reboots are *usually* wayland, but sometimes they are xorg
  too.

  Performance mode is selected in nvidia-settings, which is supposed to
  mean nvidia & therefore xorg but it's not working. Selecting it
  explicitly doesn't help either.

  What is the default meant to be - probably ondemand?

  Seems like it's somehow nondeterministic. Attaching some logs.

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