USB Passthrough not working for Windows 7 Embedded guest

[Jens Frederich]

USB Passthrough from host to guest is not working for a 32-bit Windows 7 guest.

The device appears in the device manager of Windows 7, but with "Error code 10: device cannot start". I have tried this with numerous USB thumbdrives and a USB wireless NIC, all with the same result. The device name and functionality is recognized, so at least some USB negotiation is taking place.

qemu-system-x86_64 -machine accel=kvm:tcg -name VRTP1_win -S -M pc-i440fx-1.4 -cpu SandyBridge -m 3072 -smp 2,sockets=1,cores=2,threads=1 -uuid 8ee5add7-f1a9-d697-9c18-2c1b4967c00e -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/VRTP1_win.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device ahci,id=ahci0,bus=pci.0,addr=0x6 -drive file=/var/lib/libvirt/images/VN8912_Development_0.9.2.bin,if=none,id=drive-sata0-0-0,format=raw -device ide-hd,bus=ahci0.0,drive=drive-sata0-0-0,id=sata0-0-0,bootindex=1 -netdev tap,fd=27,id=hostnet0,vhost=on,vhostfd=28 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:71:f5:45,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -vga std -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device usb-host,hostbus=3,hostaddr=18,id=hostdev0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5

[Jens Frederich (jfrederich)]

The bug occured on Ubuntu 13.04

[Serge Hallyn (serge-hallyn)]

 duplicate: 685096