Hi, if I try to start the vm by virt-manager I get this detailed error log: Fehler beim Starten der Domain: internal error: early end of file from monitor: possible problem: qemu-system-x86_64: -device usb-host,hostbus=1,hostaddr=3,id=hostdev0: 'usb-host' is not a valid device model name 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/asyncjob.py", line 127, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1363, in startup self._backend.create() File "/usr/lib64/python2.7/site-packages/libvirt.py", line 917, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: internal error: early end of file from monitor: possible problem: qemu-system-x86_64: -device usb-host,hostbus=1,hostaddr=3,id=hostdev0: 'usb-host' is not a valid device model name Regards Martin Am 18.05.2014 06:52, schrieb Gonglei (Arei): > Hi, > > From qemu-1.7 release version, the old usb-host(host-linux.c) had been removed, > re-implemented by libusbx. So you should build qemu with --enable-libusb, then > you can use usb pass-through capacity. > > BTW, Gerd, should we enable libusb by default now? Thanks. > > > Best regards, > -Gonglei > >> -----Original Message----- >> From: