https://bugs.freedesktop.org/show_bug.cgi?id=37724
--- Comment #11 from Marek Olšák maraeo@gmail.com 2012-01-05 15:14:59 PST --- The problematic commit fixes occlusion queries for some cases, so I'm sorry but I can't revert it just because it breaks an optimization which is not even enabled by default. I can take a look at the issue and see if Z compression is fixable.