in an attempt to recreate this error did you go into the bios to set the switchable graphics settings from dynamic to fixed. switchable graphics was a new feature to swap graphics card on the fly when the program running had a low frame rate, this would also save power on the low impact programs that didn't require much graphics.
The problem is that most programs won't trade up to the good card so it is necessary to just leave the bios set to fixed which just uses the good card all the time, only two programs that i am aware of will not play with this setup and they are this game, and minecraft.