Hi Viki,
Using Windows 8.1 x64.
It's also possible there's just something wrong with my current configuration of the adapter. (it's been ages since I used IB cards in any depth)
So far, I've tried both the 4.60 and 4.80 version of WinOF. Both versions see my old ConnectX card, and both apparently load the IPoIB or native ethernet driver (depending on mode I set).
The native ethernet driver "just works". The IPoIB one though isn't playing ball. It's just saying there's no cable connected, even when there definitely is and I can ibping the exact lid from another box (running OpenSM). So, the IB layer underneath is 100% working.
Also, IPoIB from a different box to the same server running OpenSM works, so it's not "IPoIB is busted in general".
The request for an older driver is my groping about in the dark. It might not fix the problem.