[Bug 41711] World of Warcraft - Legion renders into "sub-windows" incorrectly with DirectX

https://bugs.winehq.org/show_bug.cgi?id=41711

--- Comment #7 from Chris Rankin  ---
I have managed to test this on a laptop which has hybrid Broadwell/NVIDIA
graphics, and can report that Wine does indeed behave correctly when using
NVIDIA's driver. However, the bug still happens with Broadwell/Mesa.

The difference between the Wine output with each driver appears to be that
Broadwell/Mesa generates log lines like these:

err:d3d:wined3d_debug_callback 0xed9a20: "GL_INVALID_OPERATION in unsupported
function called (unsupported extension or deprecated function?)".