I have Xubuntu 13.04 amd64. I have switchable AMD GPUs with 6650M as dedicated, I have succesfully installed the very latest fglrx from AMD website (with package generation for good integration with dpkg). My dedicated GPU laughs at L4D2 on Windows with maximum settings, but now on Linux is fairly slow (it's playable but I had to downscale settings), the fps is about a maximum of 30 and sometimes it hangs for a bit.
Is it because:
- fglrx is slow
- l4d2 is still beta so when it becomes final they will fix it and will become faster
- not my dedicated gpu is used
What is the answer and anyways how can I check if my dedicated gpu is used for games? In catalyst control center I set use the more powerful gpu in the switchable section. Hint: I play Dota2 too with native resolution and high settings and that is very well playable.