As I recollect the matter, Arthur Schopenhauer did believe in free will. However, he thought it a curse, a cumbersome and mournful onus, seeing that it engendered only temporal misery.
Even so, it was not completely "free" volition. Inasmuch as one might delegate a certain manner of subsistence or routine for oneself, one was still merely choosing to continue living and, thus, succumbing to one's impulse of survival.
Ergo, the indivdual is compelled to by an unwholesome yet irrepressible "will to survive." This will is, of course, undesirable, and Schopenhauer exhorted that intellectuals with the patience to do so tolerate their mundane and inhospitable existence simply because no other alternative to this drudgery ever arises.
He encouraged the tenets of the Indian Upanishads, which advocated not fastidious, righteous, or ambitious undertakings, but placid, graceful acquiecence to the ultimate forces of the universe.