I also have the same issue with two monitors connected, one of which in portrait mode. When selecting the second monitor to switch to portrait mode, it extends the rotated monitor about halfway into the second screen and they are shown as overlapping in the display settings. It is not possible to rotate the monitor.
A temporary workaround is to set the rotation with xrandr or with the NVIDIA X Server. However, once the machine is rebooted or the screen lock turned on, the settings are "forgotten" as if one made no changes to the screen orientation at all, back to zero. Here is also a thread on reddit with more people experiencing the exact same issue: https://www.reddit.com/r/Ubuntu/comments/g82u58/cant_rotate_monitor_orientation_in_ubuntu_2004/ About my system: OS: Ubuntu 20.04 LTS x86_64 (all up to date) Kernel: 5.4.0-26-generic Uptime: 16 mins Packages: 1575 (dpkg), 9 (snap) Shell: bash 5.0.16 Resolution: 2160x3840, 3840x2160 DE: GNOME WM: Mutter WM Theme: Adwaita Theme: Yaru-dark [GTK2/3] Icons: Yaru [GTK2/3] Terminal: gnome-terminal CPU: Intel i7-6900K (16) @ 3.200GHz GPU: NVIDIA GeForce GTX 1080 Ti Memory: 2385MiB / 128743MiB If needed, I can provide more information. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874217 Title: Dual monitor setup with secondary monitor in portrait-right mode cause tiled windows to occupy 1.5 monitors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1874217/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
