What happens if are on unsupervised probation and receive DUI?

Most probation have a condition that you not be charged with additional crimes for the duration of your probation. It is possible, if your crimes are unrelated in nature, that it may not be a violation, but it seems likely that DUI is a violation of common probation terms. Even though you are unsupervised, it's not as if they won't check on your record periodically.