http://bugs.winehq.org/show_bug.cgi?id=24684
--- Comment #4 from Nephyrin zey Nephyrin@nephyrin.net 2011-07-19 18:12:47 CDT --- For the occlusion problem, this is spamming rapidly in the console when multicore rendering is enabled:
fixme:d3d:wined3d_occlusion_query_ops_get_data 0x55280a18 Wrong thread, returning 1.
I can also confirm that Portal 2 greys out the 'multicore rendering' option in its settings for some unknown reason.