Hi, I had the same problem. Tested a lot. My solution to passthrough usb
devices to a windows 7 x64 guest:
parameter part:
-device usb-ehci,id=usb,bus=pci.0,addr=0x4 -device usb-
host,vendorid=0x{},productid=0x{},id=hostdev0,bus=usb.0
I also tried the device
piix4-usb-uhci
instead of usb-ehci
piix4-usb-uhci caused the Code 10 error in the windows device manager.
lsusb will give you a list of plugged in usb devices. eg.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
1d6b:0002
and
1d6b:0003
are vendorid:prouctid
replace {} with the ids and it should work. I tested it with
- ssd usb 3.0 drive
- retail usb seagate usb 2.0 hdd drive.
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https://bugs.launchpad.net/bugs/685096
Title:
USB Passthrough not working for Windows 7 guest
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