i have the same problem with my ManLi Tv tuner. I think the solution is to download drivers from www.bytesex.org
(as you`ve mentioned, you need driver for SAA7134 not bttv).
And this way I would like to ask for some help, I can`t install those drivers
. If I dwnload the patch for my kernel, and run it, it just writes a lot of errors and nothing happens. I`ve never patched enything before, so I duno where the problem is.