Please note that since I did not specify a Device ID (a.k.a. Host Address) but only the bus (3), I'd expect all devices on bus 3 to be (automatically) added to the guest usb, even if they are plugged into the host after Qemu is started. I take the liberty of changing the status to "Opinion", if you still deem it invalid, feel free to close.
** Changed in: qemu Status: Invalid => Opinion -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1376798 Title: Qemu does not hotplug (usb) devices Status in QEMU: Opinion Bug description: Qemu passes through all devices on Bus 3 with host-usb all right when issued so on the command line such as ... -device usb-ehci,id=USBCtrl -device host- usb,bus=USBCtrl.0,hostaddr=5 but it does not pass through the devices newly hotplugged to the host after Qemu has already started. One has to explicitly issue device_add host-usb,bus=USBCtrl.0 .... on the monitor, in order for the guest (Win7 in my case) to see those devices. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1376798/+subscriptions