
Not sure if it was due to bumblebee for the dual hybrid graphics at that time, but in Ubuntu 13.10 Team Fortress 2 was unplayable with the Intel graphics, it would run very slowly and audio would repeat in short loops, but it is playable in Ubuntu 14.04 which has nvidia-prime to discretely run one graphics or the other.

My gaming laptop has both Intel HD 4600 and Nvidia graphics and when comparing them on the same laptop, besides a noticeable difference in speed (and power use/heat generated) there were some benchmarks that would not even run on the Intel graphics because it was missing some features of more advanced graphics.
