Thanks for the heads-up.
For now I'm very hesitant to change window styles since any changes in that area are unfortunately prone to introducing other kinds of regressions, and we don't have a very good understanding of native behaviour (D3D9 in this case) either. This is definitely going to need some more investigation on our end.
Nothing extracted yet.
Hey DXVK team, my apologies for the delayed response to https://github.com/GPUOpen-Drivers/AMD-Gfx-Drivers/issues/57 .
The swapchain breakage on Windows is because DXGI requires that HWND's have the following properties
It may be some time before our fix makes it downstream. In the meantime, it might be easier to workaround this in DXVK by appending a required style (like WS_POPUP) for applications that don't meet these requirements.
For FalloutNV in particular, the black screens were due to having WS_EX_TOPMOST set without any other required styles. I'm not sure if the other bug reports you had are all the same issue but it may be worth ensuring HWND compliance.