Comment 71 for bug 1431753

Sezer, you're not going to believe this, but the issue you're having with steam has nothing to to with the nvidia driver, but is caused by a completely unrelated kernel bug that just happened to occur at the same time people started testing the fix for the nvidia driver; see lp:1479093 . The fix for the kernel bug is already released, so just upgrade your kernel yet again, and your steam problem will go away.

I have to add that I also got confused by wine not working anymore after applying the nvidia patch (and upgrading the kernel for the first time in many months in order to test it), and it took me almost 2 hours to figure out the problem was unrelated. This whole affair is turning into one of the most frustrating experiences I've ever had with Ubuntu.