On 04/19/2012 10:44 AM, Carlos Rodrigues wrote:
Hello,
I have a problem with USB pass-through.
I can see the USB device in host machine, i see it in libvirt but when attach to VM i get an error:
# lsusb ... Bus 002 Device 014: ID 0529:0001 Aladdin Knowledge Systems HASP v0.06 ...
# virsh nodedev-list ... usb_device_529_1_noserial usb_device_529_1_noserial_if0 usb_device_529_1_noserial_usbraw ...
# virsh dumpxml vm ...
<hostdev mode='subsystem' type='usb' managed='no'> <source> <vendor id='0x0529'/> <product id='0x0001'/> </source> </hostdev> ...
# cat /var/log/libvirt/qemu/vm.log ... LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin HOME=/ QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc -m 3800 -smp 4 -name vm -uuid 056dad8b-22a4-4472-cb5e-8cf60215a41b -monitor unix:/var/lib/libvirt/qemu/v,.monitor,server,nowait -boot c -drive file=/dev/vg_sata2/vol_vm,if=virtio,boot=on,format=raw -net nic,macaddr=00:00:00:0b:5b:ec,vlan=0,model=virtio,name=net0 -net tap,fd=21,vlan=0,name=hostnet0 -serial none -parallel none -usb -usbdevice tablet -vnc 0.0.0.0:4 -k pt -vga cirrus -usbdevice host:002.014 -balloon virtio husb: open device 2.12 /proc/bus/usb/002/012: No such file or directory Warning: could not add USB device host:002.014 ...
I'm using libvirt 0.8.3 with kvm 88.
Anyone have see this problem?
That sounds like this problem: commit 823a684f8d0495bd5e7b413e1a81fd5a600abef7 Author: Daniel P. Berrange <berrange@redhat.com> Date: Thu Feb 11 14:39:13 2010 +0000 Fix USB device path formatting mixup * src/util/hostusb.c: The device path for a USB device wants the bus/device IDs in decimal not octal but the fix was included in libvirt 0.7.7. What is the output of "find /proc/bus/usb"? I'm guessing that there *is* a 002/014, but no 002/012. Since kvm-88's error message lists both, my next guess is that kvm-88 really *is* expecting the USB device to be given as octal. Are you able to upgrade to newer kvm or libvirt? (note that there may be a newer kvm available under the package name "qemu-kvm" or even "qemu", depending on your distro).