Overwritting 61-gdm.rules with ln -s /dev/null /etc/udev/rules.d/61-gdm.rules
solves the issue for me. Now I have X11 and Wayland options back, tested Wayland and works great. I also can use new optimus environment variables to choose between discrete and integrated cards. For vulkan apps, the Nvidia card is selected first, but nothing I can't override by setting VK_ICD_FILENAMES environment variables for radv. Let me know if I can help testing new defaults so this can be solved. Regards Sebastián