[Qemu-devel] [Bug 1392504] Re: USB Passthrough is not working anymore

[Leen Keus]

Found the following lines in /var/log/libvirt/qemu/<machine>.log
libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device 
/dev/bus/usb/001/004: Permission denied
libusbx: error [_get_usbfs_fd] libusbx requires write access to USB device 
nodes.
libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device 
/dev/bus/usb/001/004: Permission denied
libusbx: error [_get_usbfs_fd] libusbx requires write access to USB device 
nodes.
libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device 
/dev/bus/usb/001/004: Permission denied
libusbx: error [_get_usbfs_fd] libusbx requires write access to USB device 
nodes.

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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.

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