I had this same problem. I've discovered that the newer remotes that Comcast issues with the "Xfinity" brand do not work with the X1. Try to acquire a remote that is "Comcast" branded and it will work. The remote must have "Comcast" written near the bottom of the remote instead of "Xfinity." The Silver and gray "Comcast" remotes both work with the X1 using code 01982. There is one difference though. The gray ones work fine. On the silver ones the exit button does...