Hey! So I recently installed Ubuntu 17.04 (as it is the latest Ubuntu OS). Everything installed perfectly, however, the only thing wrong with Ubuntu is the stuck screen resolution on 640x480! My Acer - H6 Series 23" IPS LED HD Monitor is originally 1920x1080, however, due to something wrong in Ubuntu, the screen is stuck on 640x480 (Like I previously stated) PLEASE HELP ASAP