Verification steps:
1) Enable proposed
2) sudo apt install mutter=45.2-0ubuntu4 (and other mutter binary packages)
3) Reboot
4) Connect external monitor to the affected system
5) Switch display modes to mirror mode
6) Observe the mirror mode can be set successfully. So the issue is resolved.
Verification steps: 45.2-0ubuntu4 (and other mutter binary packages)
1) Enable proposed
2) sudo apt install mutter=
3) Reboot
4) Connect external monitor to the affected system
5) Switch display modes to mirror mode
6) Observe the mirror mode can be set successfully. So the issue is resolved.