Unable to use wayland due to signal 9 killing gnome-shell

Affected version

mutter-46.2

System/Package Info:

• Ubuntu-24.04.1
• mutter-46.2

Bug summary

I am unable to use Wayland as the gnome desktop defaults to x11 without any option for Wayland despite Wayland being default for Ubuntu. The gear icon to interchange desktop session in GDM is missing. Reported this downstream: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2077216 and the conclusion was that gnome-shell is being killed by signal 9 and the workaround of adding MUTTER_DEBUG_KMS_THREAD_TYPE=user to /etc/environment is working.

Steps to reproduce

1. Power on computer.
2. Login Screen(GDM) appears without the gear icon.
3. After, logging in,type echo $XDG_SESSION_TYPE in the terminal, the output will be x11.

What happened

Mutter defaults to x11 despite Wayland being default of ubuntu-gnome session. No option to either select Wayland session at login screen. Happening due to gnome-shell being killed by signal 9, as is the conclusion from downstream: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2077216

What did you expect to happen

Mutter/gnome-session defaults to Wayland along-with an option to select x11 at login-screen.

Relevant logs, screenshots, screencasts etc.

https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2077216/+attachment/5806948/+files/journal.txt