Could you give some detail on how to make this change? Should I disable the nividia driver in the restricted drivers panel then install nvidia-glx using apt-get?I had the same problem, I could watch livetv or a few recording but than all of the sudden it would lock the pc in a full pink screen or I would get the rainbow screen. I would have to reboot to get it working again until it would happen again. The only way I was able to fix it was to intall the nvidia-glx drivers instead of the nvidia-glx-new. Let me know if you need more info.