https://bugs.winehq.org/show_bug.cgi?id=46799
--- Comment #3 from trainingmacro@gmail.com --- I think the basic issue here is that wine should not take that much control over the hardware/software. It's overstepping its task by becoming windows rather than just running windows software. I'd also like to state that Linux games, including those that run SDL do not have this issue either, to me it seems pretty confined to wine.
The dxdiag message only states its falling back, it doesn't mention anything about taking control of all available monitors and preventing the window manager from functioning properly.