Greeting to all. I am new to Ubuntu and I have run into a problem trying to run Team Fortress 2. I am able to open Steam but when the game is about to start up, I get an error message saying (Required GL extension "GL_EXT_texture_sRGB_decode" is not supported. Please update your OpenGL driver). I later went on Youtube and found a video on how to upgrade the driver, but the terminal responds that it does not detect any drivers that need to be upgraded.Or when it detects a driver it says it is no longer needed. I have followed walk-troughs on how to install the drivers, but the walk-throughs do not explain how to activate the driver. In some of the videos I saw the driver is listed in the available drivers program. When I go there, I cannot find the driver I installed.I have forgotten how to see which driver I have in the terminal as well.