Possibly died 8 Jan 1303.
A second testament of "Beatrix relicta…Dom. Reymundi Berengarii comitis provinciæ", dated 22 Feb 1264, adds bequests to "Thomam Amedeum et Ludovicum filios quondam Dom. Thome fratris mei…Alienore filie predicti comitis Thome…"[1531]. According to Europäische Stammtafeln[1532], Comte Louis was born in Oct 1250 but, for the same reasons as cited in relation to the birth of his older brother Thomas (see above), this date looks unlikely. Baron de Vaud, Seigneur de Moudon, de Romont, de Rue, de Contrey, de Saillon, de Nyon et d'Aubon in 1286, accorded him by his brother Amédée V Comte de Savoie to assure his acceptance of the latter's accession as Count[1533]. "Lois de Savoie Sire de Waut" agreed peace with the town of Fribourg by charter dated 1292[1534]. "Ludovicus de Sabaudia dominus Vaudi" sold the village of "Forel iuxta Savignietum" to the bishop of Lausanne[1535]. The testamentary codicil of "Lodovico di Savoia Signore di Vaud" made at Naples 10 Jan 1301 chooses his burial "nella Chiesa di S Pietro dell'Ara di Napoli", appoints "Ludovico di Lui figlio primogenito" or in default "Pietro alto suo figlio Giuniore, e di Lui fratello uterino", and makes bequests "a Bianca, e Cattarina sue figlie…di Lui Consorte Isabella", referring to the possibility of a posthumous child born from his wife[1536]. He died before 27 Apr 1303, the date of the contract of marriage between "Pietro di Grançon Nipote d'Ottone Signore di Grançon" and "Bianca figlia del fu Lodovico di Savoia Signore di Vaud"[1537]. The necrology of Lausanne records the death 8 Jan of "d. Ludouicus de Sabaudia" and his donation of revenue from "Cletis…[et] Niudini"[1538].
http://fmg.ac/Projects/MedLands/BURGUNDY%20Kingdom.htm#Louisdied1302B