Where the Buffalo Roam (1980)
"The deranged adventures of Gonzo journalist Hunter Thompson and his attorney Oscar Acosta, referred to in the movie as 'Laslow'. Thompson attempts to cover the Super Bowl and the 1972 Presidential election in his typical drug-crazed state, but it continually and comically sidetracked by his even more twisted friend Laslow. Allegedly based on actual events." -imdb.com
(he didnt commit suicide)