[Bug 45683] Gothic 2 frozen when focused

https://bugs.winehq.org/show_bug.cgi?id=45683

--- Comment #10 from Henri Verbeet  ---
I can reproduce this (my setup is fairly similar: Mesa 18.1.4, VEGA10), but it
looks like a driver issue to me.

In particular, it somehow seems related to doing FBO blits to the frontbuffer
after having done a SwapBuffers(). We're hanging in the glBlitFramebuffer()
call to the frontbuffer in texture2d_blt_fbo(). LIBGL_ALWAYS_SOFTWARE=1 is a
workaround. Another workaround is forcing "swap_interval" to either 0 or 1 at
the start of ddraw_surface_update_frontbuffer().

I can try to look into it a little further, but the quickest way to get this
fixed may be to bring this issue to the attention of the Mesa developers.