Hello Serge, it worked flawlessly. To test it I did the following steps:
1) Added poposed repository line in sources.list of hypervisor: deb http://archive.ubuntu.com/ubuntu/ precise-proposed restricted main multiverse universe 2) Kept back other proposed packages adding the following in /etc/apt/preferences.d/proposed Package: * Pin: release a=precise-security Pin-Priority: 990 Package: * Pin: release a=precise-updates Pin-Priority: 900 Package: * Pin: release a=precise-proposed Pin-Priority: 400 3) apt-get update && apt-get upgrade 4) apt-get install libvirt-bin/precise-proposed libvirt0/precise- proposed 5) Stopped VM, edited config in virsh adding 6 USB devices: <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x067b'/> <product id='0x2303'/> <address bus='2' device='4'/> </source> </hostdev> <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x067b'/> <product id='0x2303'/> <address bus='2' device='5'/> </source> </hostdev> <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x067b'/> <product id='0x2303'/> <address bus='2' device='6'/> </source> </hostdev> <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x067b'/> <product id='0x2303'/> <address bus='2' device='7'/> </source> </hostdev> <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x067b'/> <product id='0x2303'/> <address bus='2' device='8'/> </source> </hostdev> <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x067b'/> <product id='0x2303'/> <address bus='2' device='9'/> </source> </hostdev> 6) Restarted the VM, and it detects all of them: Bus 001 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Bus 001 Device 004: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Bus 001 Device 005: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Bus 001 Device 006: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Bus 001 Device 007: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Bus 001 Device 008: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Thanks a lot! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1082213 Title: libvirt: When installing two or more identical usb devices in a VM, only one works To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1082213/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs