I have been trying to play mod packs through the Technic launcher, but whenever I download and play a pack, it opens up Minecraft in the very bottom right of my screen. When the game loads into the title screen, when I fullscreen there is no buttons or words. Also, whenever I enter a world and I try to put it into fullscreen, the screen bugs out and starts going crazy. (almost like if the camera starts spinning in a circle). I have tried looking for fixes but it seems as no one else has this problem. I am in desperate need for help, as I get little to no FPS when not in fullscreen. (Yes, this happens in all the mod packs I've checked so far.)
Video: https://www.youtube.com/watch?v=IwnCAxhpfB4
