This message was posted on behalf of Intel Corporation
In regard to your inquiry I just wanted to let you know that Intel does not test and validate Intel® NUC on Linux, all the tests were done using Windows, however we know that a lot of NUC owners are using it successfully on many different Linux distros, and as you mentioned the fact that the NUC works fine with Windows it means that the hardware is working fine and this problem is directly related to Ubuntu,
Based on that the best thing to do at this point will to access your Linux distro's website and forums for further peer assistance with this issue at:
Let me apologize for any inconvenience, but to get the most accurate Ubunto support please use those forums, in there you should fins a work a around or different suggestions in order to install Ubunto.
Any questions, please let me know.