While the phrase "L'été de tous les chagrins" appears in film and literature, there is no specific musical work by this title currently listed on IMSLP (International Music Score Library Project).
Currently, there is no official musical work titled "L'été de tous les chagrins" hosted on IMSLP. The soundtrack for the film was composed by Pierre Jansen, a renowned composer known for his collaborations with Claude Chabrol, but his film scores remain under copyright and are generally not available for free download on public domain sites. The Film: L’été de tous les chagrins (1989)
Search results for "L'été de tous les chagrins" on IMSLP often lead to tangential results, such as works by Joseph Bodin de Boismortier titled L'Eté or general collections of French songs. There is no official record of a score under the exact title "L'été de tous les chagrins" currently hosted on IMSLP.
You may be looking for one of these similarly named works that related to music or scores: "L’été indien" (Joe Dassin):
"L'été de tous les chagrins" is a short, melancholic piece for piano (sometimes arranged for other instruments).
