At first glance I see "-machine pc-1.2,accel=kvm,usb=off" and then "-device nec-usb-xhci,id=usb,bus=pci.0,addr=0x5"... I'm not sure if those should be used together.
Can you look in your libvirt logs from before the upgrade to see if it was using the usb=off option before? @kraxel-redhat do you know if that's a legitimate set of options? -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1392504 Title: USB Passthrough is not working anymore Status in QEMU: New Bug description: After upgrading from Ubuntu 14.04 to Ubuntu 14.10 USB passthrough in QEMU (version is now 2.1.0 - Debian2.1+dfsg-4ubuntu6.1) is not working any more. Already tried to remove and attach the USB devices. I use 1 USB2 HDD + 1 USB3 HDD to a virtual linux machine; 1 USB2 HDD to a virual FNAS machine and a USB 2camera to virtual Win7 machine. All these devices are not working any more. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1392504/+subscriptions
