I have the same problem in Ubuntu Mate 18.04. I was able to fix the problem following John's suggestion:
At first I looked for package dependencies: $ apt-cache showpkg gnome-boxes Then we look for qemu-system-x86 configuration files: $ cat /var/lib/dpkg/info/qemu-system-x86.conffiles Then we add `group=kvm` to /etc/modprobe.d/qemu-system-x86.conf Then we add ourselves to the kvm group $ sudo usermod -a -G kvm $USER Since closing and restarting Boxes didn't work I rebooted and then I was able to spin an Ubuntu 18.04 VM on my laptop with gnome-boxes. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1762205 Title: GNOME boxes fails to start virtual os To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-boxes/+bug/1762205/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
