Please try logging into 'Ubuntu' instead of 'Ubuntu on Wayland' and tell us if that has the same issue. Please also then run:
lspci -kv > lspci.txt xrandr --verbose > xrandr.txt journalctl -b0 > journal.txt and attach the resulting text files here. ** Changed in: mutter (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1905270 Title: On any external monitors, wayland session has a white block on most part of the screen. To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1905270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs