Ubuntu
lightdm package

  1. Bug #1868780
  2. Comment #14

Comment 14 for bug 1868780

Revision history for this message
Paul Donohue (s-launchpad-paulsd-com) wrote :

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