On 2014/11/11 1:52, MikeFrysinger wrote: > i've attached the `lsusb -v` output for the device. it is USB 2.0. the > sysfs speed file shows 480. >
You should add an ehci controller or xhci for USB2.0 device. Please use such below cmdline: -device usb-ehci,id=ehci \ -device usb-host,bus=ehci.0,vendorid=1307,productid=0163 BTW, This is a really bug, and Gerd had posted a patch: [PATCH] usb-host: fix usb_host_speed_compat tyops http://lists.gnu.org/archive/html/qemu-devel/2014-11/msg01441.html After applying this patch, you will get a warning: "Warning: speed mismatch trying to attach..." if you use the cmdline as your showing. Thanks, -Gonglei > the qemu cmdline: > qemu-system-x86_64 \ > -hda images/root \ > -hdb images/var \ > -hdc images/usr \ > -append "root=/dev/hda console=ttyS0 panic=3 init=/ginit" \ > -kernel images/bzImage \ > -nographic \ > -no-reboot \ > -m 512 \ > -enable-kvm \ > -usbdevice host:1307:0163 > > ** Attachment added: "lsusb.txt" > > https://bugs.launchpad.net/qemu/+bug/1385934/+attachment/4257409/+files/lsusb.txt >
