Same for me, I steel need MUTTER_DEBUG_USE_KMS_MODIFIERS=0 to get GDM/Mutter working properly. I attach the result of journalctl -e (during failed session), in case it can be useful ?
** Attachment added: "journalctl.log" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1966808/+attachment/5576864/+files/journalctl.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1966808 Title: [radeon] gnome-shell Wayland sessions fail to start on legacy Radeon systems (Failed to lock front buffer on /dev/dri/cardN: drmModeAddFB2WithModifiers failed: Invalid argument) To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1966808/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
