He was born in the Dauphine region and became a canon of the cathedral in Valence. In 1080, while attending a synod in Avignon, Hugh was named bishop of Grenoble. He attempted a massive reform of the diocese, but, discouraged, retired to Chaise Dieu Abbey, and became a Benedictine. Pope St. Gregoiy VII ordered him back to Grenoble. Hugh gave St. Bruno the land on which the Grande Chartreuse was founded, thus starting the Carthusians.
Hugh died on April 1 and was canonized by Pope Innocent II.