No not that, even 640 x 480 my TV resolution never changes. However if I use any other app / game that goes full screen it works.
In other words, say I have a 640x480 game, okay? If my screen res is anything but 640x480, it wont be actuall full screen. For example. my res is 1440x900, when I go fullscreen on linux, my screen res stays 1440x900 with a 640x480 square in the middle surrounded by black. However when I put my virus infected old windows 98 Hard Drive in the same comp it actually went full screen, but anyways I'm back on linux again cause I dont wanna use virus infected stuff, but yeah it's not the drivers cause I have this one crappy alien game in linux that goes fullscreen in 640x480
I already knew about the 320x240