Despite his piety, Hugh was in constant conflict with the abbey of St. Maixent. On numerous occasions his disputes with the monks grew so violent that the duke of Aquitaine, the bishops of Poitiers and Saintes, and Pope Paschal II were forced to intervene. From these conflicts Hugh was dubbed "le diable", the devil, by the monks of St. Maixent.
Hugh took the cross for the First Crusade, along with his brothers Raymond and Berenguer. He participated in the Crusade of 1101.
From his marriage c. 1065 to Hildegarde or Ildégarde de Thouars, daughter of Aimery IV de Thouars, Vicomte de Thouars, and wife Aurengarde de Mauleon, Hugh had a son and successor, Hugh VII of Lusignan.
Sources
Riley-Smith, Jonathan. The First Crusaders, 1095–1131. 1998.