@Xperianist
For your path, you don't need the second /opt/VirtualGL (you have it at the end) as there is no bins in that folder. Additonal paths can break your install.
That being said, I don't think that is the issue. I can see you have installed the older drivers. I have left those there for a kind of legacy reason but you should use the latest drivers which start at post 25.
I know it is most likely not what you are looking for but the newer drivers will most likely fix your issue ( as they have for quite a few people now)
As for your partiular fault, do you have an Nvidia GT750M?
