Comment 16 for bug 1848326

albertomilone, looks good to me.

I tried switching from nvidia to intel and back rebooting on each attempt and haven't managed to reproduce the issue. Looks like reordering udev rules and/or adding another device class in your change helped (thanks a lot!).

I don't see an nvidia device in lspci output as well after rebooting with `prime-select intel` done:

➜ ~ lspci | grep -i nvidia
➜ ~
➜ ~ lspci | grep -i VGA
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 630 (rev 04)

/lib/udev/rules.d/50-pm-nvidia.rules
https://paste.ubuntu.com/p/2WScDVDQPq/

cat /lib/udev/rules.d/61-gdm.rules
https://paste.ubuntu.com/p/5K6hgKmrG2/

# that's for nvidiafb which is normal and comes from the kmod package
➜ ~ grep -RiP nvidia /etc/modprobe.d
/etc/modprobe.d/blacklist-framebuffer.conf:blacklist nvidiafb

➜ ~ uname -r
5.4.0-14-generic

➜ ~ dpkg -l | grep -P 'nvidia-prime|nvidia-driver|Xorg|gdm3'
ii gdm3 3.34.1-1ubuntu1 amd64 GNOME Display Manager
ii nvidia-driver-440 440.59-0ubuntu2 amd64 NVIDIA driver metapackage
ii nvidia-prime 0.8.14 all Tools to enable NVIDIA's Prime
ii xserver-xorg-core 2:1.20.7-2ubuntu1 amd64 Xorg X server - core server
ii xserver-xorg-legacy 2:1.20.7-2ubuntu1 amd64 setuid root Xorg server wrapper
ii xserver-xorg-video-nvidia-440 440.59-0ubuntu2 amd64 NVIDIA binary Xorg driver