I don't think this is quite fixed. I have my laptop display set to 2048x1152 and it connects fine to an external monitor via thunderbolt running the full 2560x1440 resolution but when disconnecting the display would reset to default 2560x1440 resolution with 200% scaling.
After reading this bug report about fractional scaling, I disabled the option and now disconnecting the display from the laptop it returns to my preferred 2048x1152 with 100% scaling. I am using the latest mutter version: dpkg -s libmutter-6-0 | grep Version Version: 3.36.2-1ubuntu1~20.04.1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1825593 Title: Display scale not remembered when X11 Fractional Scaling is enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1825593/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs