On Monday, 8 December 2025 14:40:40 CET Volker Gruenewald wrote: > [root@debian01:/usr/local/admin/scripts]# xl usbdev-attach smart10 hostbus=1 > hostaddr=5 libxl: error: libxl_qmp.c:1837:qmp_ev_parse_error_messages: > Domain 13:Bus 'xenusb-0.0' not found libxl: error: > libxl_device.c:1500:device_addrm_aocomplete: unable to add device > libxl_device_usbdev_add failed. > > USB Controlles is created as expcted, but not possible > > [root@debian01:/usr/local/admin/scripts]# xl usb-lis smart10 > Devid Type BE state usb-ver ports > 0 devicemodel 0 0 2 6 > Port 1: > Port 2: > Port 3: > Port 4: > Port 5: > Port 6:
This looks like you are trying to pass through a usb1 device, but there is only a virtual usb2 controller in your vm. If you adjust your vm configuration to create a virtual usb1 controller this error will probably go away. You can do this by specifying usb = 1 or alternatively for an usb1 and usb2 controller usbctrl = [ "version=1, ports=2", "version=2, ports=6" ] in your vms configuration. However you likely will run into a different error: $ xl usbdev-attach testvm hostbus=1 hostaddr=4 libxl: error: libxl_qmp.c:1837:qmp_ev_parse_error_messages: Domain 6:Parameter 'hostaddr' expects uint64 libxl: error: libxl_device.c:1500:device_addrm_aocomplete: unable to add device libxl_device_usbdev_add failed. This is a bug in xen and I'm currently in contact with xen upstream about that. A possible fix is here: https://lore.kernel.org/xen-devel/[email protected]/
