I fixed a possible similar problem with tftpd listening on IPv6, but I've not tried it with XDMCP as i've moved on now.
For more intrepid souls wishing to have a go, here's a link to the launchpad bug in question:
https://bugs.launchpad.net/ubuntu/+source/netkit-tftp/+bug/105863
I fixed a possible similar problem with tftpd listening on IPv6, but I've not tried it with XDMCP as i've moved on now.
For more intrepid souls wishing to have a go, here's a link to the launchpad bug in question:
https:/ /bugs.launchpad .net/ubuntu/ +source/ netkit- tftp/+bug/ 105863