I face the exact same issue for the same graphics card. For some bizarre unknown reason, the 'Star Wars Jedi Knight...' that you see is actually the executable path for the Minecraft javaw (You can click on it and then under the 4th tab see it under the executable path). While I don't have any solution why we cannot use the AMD card, a work-around (doesn't work always) is to launch another game which will use your AMD card and then immediately run Minecraft after closing the other game. Like I said, doesn't work always but you can give it a try in case Minecraft gets laggy