Hi,
I just installed the cxgames 9 beta. The new steam runs just fine with it. So far tested only one game, l4d2, but that runs very slow. I get about 15-20 fps with all low settings and 1680x1050 resolution. With 8.1.4 it was running smoothly. My specs are linux/3GHz Core 2/4GB RAM/nvidia 260GTX, which should be adequate...
Any tips?
Edit: just submitted a ticket for this.