I have a DL-165 adapter from plugable. I have not been able to get it to work in ubuntu 12.04 and higher – I don’t even get the green screen under 13.04. On a wimp I tried fedora 18 (off the live CD), and to my surprise, (1) it mirrors the main display after I activate it in display setting, and (2) extended desktop works perfectly after I install arandr. It just works – no tweaking was needed!
This is perfect. But I use ubuntu at work/home and I’d rather not have to deal with another distro. Question: How should I tweak ubuntu 13.04 (or whichever version/kernel combo) to make it works like it does in fedora 18?