This may be a problem related to virt-manager (the GUI for libvirt). I've just experienced the same problem with virt-manager, and managed to circumnavigate the issue by booting the VM using the command line tools.
Here's what I did: Connect: virsh --connect qemu:///system Start the VM: start myvirtmachine Connect to the machine using VNC (if configured) I also reloaded the XML file for my virtual machine (define myvirtmachine.xml), but that was to fix another problem, but I'm noting this. -- Error starting domain: virDomainCreate() failed Failed to add tap interface 'vnet%d' to bridge 'br0' : Permission denied https://bugs.launchpad.net/bugs/247677 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
