[01:00] <picko> Hi -need to install Ubuntu on a headless, keyboardless computer, without physical network, but with a usb wifi stick.
[01:00] <picko> anyone have experience on this stuff?
[09:10] <cjwatson> phillw: It's an entirely different kernel with a different ABI.  d-i images contain kernel modules, so if you're running it with a different kernel then you must rebuild d-i against it.  All the necessary stuff is in build/config/ in d-i.