The problem is that Xfwm's built-in compositor and virgl don't play nice together.
Work-around: Boot the VM with virgl=off (on the video device) or gl=off (on the display), run xfwm4-tweaks-settings in the VM, select the "Compositor" tab, and uncheck "Enable display compositing". Then shut down the VM and re-enable virgl. picom works with Xfwm and doesn't seem to have the same issues, so if you want a compositor, install/use picom instead of using Xfwm's built- in compositor: https://wiki.archlinux.org/index.php/Picom -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1868780 Title: [virtio] Xubuntu 20.04 - Blank screen after login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1868780/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
