Looks like the next step would be to test with an older NVIDIA driver version from the Ubuntu repository, and maybe with the slightly newer version 390.77 from the NVIDIA website also.
** Changed in: xfce4 (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767711 Title: Nvidia+XFCE: Totem window is see-through during playback, colours washed out To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1767711/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs