Comment 3 for bug 1393842

Taking the steps Mark Grocock posted did not resolve this issue for me. I have no idea where else it may go wrong. The issue remains the same:

Unable to complete install: 'internal error: process exited while connecting to monitor: 2014-12-11T15:32:03.946345Z qemu-system-x86_64: -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/fedora21-server.org.qemu.guest_agent.0,server,nowait: Failed to bind socket: Permission denied
2014-12-11T15:32:03.946450Z qemu-system-x86_64: -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/fedora21-server.org.qemu.guest_agent.0,server,nowait: chardev: opening backend "socket" failed
'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 91, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/create.py", line 1820, in do_install
    guest.start_install(meter=meter)
  File "/usr/share/virt-manager/virtinst/guest.py", line 403, in start_install
    noboot)
  File "/usr/share/virt-manager/virtinst/guest.py", line 467, in _create_guest
    dom = self.conn.createLinux(start_xml or final_xml, 0)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3398, in createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self)
libvirtError: internal error: process exited while connecting to monitor: 2014-12-11T15:32:03.946345Z qemu-system-x86_64: -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/fedora21-server.org.qemu.guest_agent.0,server,nowait: Failed to bind socket: Permission denied
2014-12-11T15:32:03.946450Z qemu-system-x86_64: -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/fedora21-server.org.qemu.guest_agent.0,server,nowait: chardev: opening backend "socket" failed