There's no chance Ubuntu will see cards such as GTX 780M. Man. What are you talking about... I would be surprised if it would recognize at least something like 945GMS (and it doesn't at the moment, I'm telling you, it says it's "Unknown" and you can't benefit from hardware acceleration in any scenario, like watching YouTube at least at 360p or something). Linux is officially the worst way to check whether your hardware is alive or not, because FOSS drivers usually provide only basic functionality and only for the >10% of existing hardware. Installing proprietary ones usually ends up in permanent black screen at boot if you happen to make any mistake, and you probably will - every single guide about installing AMD/NVIDIA drivers in Linux is outdated or just not clear enough to make anything good happen.