> > Else if devd is not available on 4.11 you will have to change
> > some code and
> > compile a new kernel, from what I can see.
> >
> > To the file /sys/dev/usb/ukbd.c add this:
> >
> > static void
> > usbd_add_device_detach_event(device_t self)
> > {
> > struct usb_event ue;
> >
> > bzero(&ue, sizeof(ue));
> >
> > strlcpy(ue.u.ue_device.udi_devnames[0],
> > device_get_nameunit(self), USB_MAX_DEVNAMELEN) ;
> >
> > usb_add_event(USB_EVENT_DEVICE_DETACH, &ue);
> > return;
> > }
> >
> > ukbd_detach()
> > {
> > ...
> > usbd_add_device_detach_event(self);
> > return (0);
> > }
> >
> > This will make the suggestion from Maksim work.Ok, that seems to work with a minor change [no strlcpy] and two additional patches in usb.h & usb.c. Usbd gets a detach event "ukbd0" and another event from its fallthrough device. Thank you once again. If someone is interested in the patch files against 4.11 see the attachment. Norbert
ukbd.c.patch
Description: Binary data
usb.c.patch
Description: Binary data
usb.h.patch
Description: Binary data
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