Comment 24 for bug 2051074

verify fixed with mutter 42.9-0ubuntu7 in jammy-proposed.
SEV16_DVT1_C4 202309-32111

1. enable proposed
2. sudo apt update
3. sudo apt dist-upgrade
4. sudo reboot -i
5. sudo dpkg -l | grep mutter (make sure all mutter related were ugpraded to 42.9ubuntu7)
6. Connect external monitor to the affected system
7. Switch display modes to mirror mode
8. Observe the mirror mode can be set successfully. So the issue is resolved.