@Jamie: I do have tried both this tricks, and still no luck! Luckily the 11.8 from website works. But I guess this may be card-specific, so this is rather unrelated to this bug, which seemed to originate from Unity.
@Jamie: I do have tried both this tricks, and still no luck! Luckily the 11.8 from website works. But I guess this may be card-specific, so this is rather unrelated to this bug, which seemed to originate from Unity.