Hey nickmaelao, your outputs show you've only changed the ownership of the USB bus and not the USB device itself...I'd suspect if you looked at 'ls -la /dev/bus/usb/001/' then the actual USB device will still have root ownership. Ergo if libvirtd is still creating the vm's with qemu and a non-root user you will still have the problem.
chmod libvirt-qemu:kvm /dev/bus/usb/001/xxx (xxx being the USB device numeber) should resolve. Alternatively you could change /etc/libvirtd/qemu.conf and make libvirtd create guests with qemu as the root user, look for the 'user = ' and 'group = ' lines. I can't comment on the risk associated to this so you'll need to look into that yourself but I've taken this approach and have no problems with USB attachment and I don't need to manually change device ownerships. -- 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: libvirt not relabeling devices on USB Passthrough Status in QEMU: New Status in libvirt package in Ubuntu: Triaged 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
