I just recently got this working on my machine using optirun wine Steam.exe in the proper directory because I have an Optimus setup, and I'm using Bumblebee drivers/packages. I don't know if this helps your situation at all, and I don't know if you're running Optimus, but I thought I might share tha...

I think these later nVidia drivers are problematic. I'm not sure of a valid fix for this, but I know that I have Optimus on my laptop, so I wound up having to use Bumblebee and use optirun wine Steam.exe after moving into the proper directory containing Steam.exe in the .wine folder and it solved th...