http://bugs.winehq.org/show_bug.cgi?id=25199
--- Comment #2 from Henri Verbeet hverbeet@gmail.com 2010-11-17 08:34:10 CST --- (In reply to comment #0)
Note that the initial loading sequence was not glitch-free before the regression either: the intro movie began to play normally but after 2-3 seconds it became extremely choppy. The console was flooded with the following message: err:d3d_surface:surface_prepare_system_memory Surface without memory or pbo has SFLAG_INSYSMEM set!
Yeah, that would cause this. SFLAG_INSYSMEM is only supposed to be set when we have an actual sysmem copy. The code that was removed would have masked this bug by allocating memory for the surface anyway.