You might try connecting the device to a ehci/xhci bus (instead of the default uhci bus... i.e. USB 1.1). See docs/usb2.txt in the qemu source for more info.
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1385934 Title: USB with passthrougth guest cannot enumerate USB host Status in QEMU: New Bug description: Following the guide at http://www.linux-kvm.org/page/USB_Host_Device_Assigned_to_Guest Qemu is launched with qemu-system-x86_64 /dev/vgstripe/kvm_wifi -enable-kvm -m 512 -k fr -net nic -net tap,ifname=tap1,script=/bin/ifup.script -kernel /usr/src/linux_git/arch/x86_64/boot/bzImage -append root=/dev/sda -usb -device usb-host,hostbus=1,hostaddr=6 The USB device does not show and USB stack seems not working On the guest: dmesg |grep -i usb [ 1.416966] hub 1-0:1.0: USB hub found [ 1.420431] usbcore: registered new interface driver usb-storage [ 1.445374] usbcore: registered new interface driver usbhid [ 1.446839] usbhid: USB HID core driver [ 1.863226] usb 1-1: new low-speed USB device number 2 using uhci_hcd [ 2.126173] usb 1-1: Invalid ep0 maxpacket: 64 [ 2.373161] usb 1-1: new low-speed USB device number 3 using uhci_hcd [ 2.648112] usb 1-1: Invalid ep0 maxpacket: 64 [ 2.892404] usb 1-1: new low-speed USB device number 4 using uhci_hcd [ 2.913001] usb 1-1: Invalid ep0 maxpacket: 64 [ 3.161367] usb 1-1: new low-speed USB device number 5 using uhci_hcd [ 3.180070] usb 1-1: Invalid ep0 maxpacket: 64 [ 3.181633] usb usb1-port1: unable to enumerate USB device lsusb Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub On the host: lsusb Bus 001 Device 006: ID 0457:0163 Silicon Integrated Systems Corp. SiS163U 802.11 Wireless LAN Adapter qemu-system-x86_64 --version QEMU emulator version 2.1.2, Copyright (c) 2003-2008 Fabrice Bellard To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1385934/+subscriptions
