Please disregard my previous comment about being broken in 14.04 -- In fact I was running 14.10 and didn't realize it (a reboot and 14.10 being the grub default). In fact the passthrough still works in 14.04 just fine, and still fully broken in 14.10.
I did confirm, however, that there are NO apparmor messages regarding qemu on my 14.10 system. -- 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 Status in qemu package in Ubuntu: Incomplete 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