I'm having a hard time with my Radeon 9800 Pro. After having succeded in installing the drivers i can't get vsync to work. When activating vsync OpenGL application seem to be laggy: the video output is laggy and comes out later than the Sound or Keyboard input !?

My Specs:
Mandrake 10.1
Xorg 6.8
Newest ATI Drivers (8.12 somewhat)
Radeon 9800 Pro

Is there anyone who got vsync working properly?

There's no point in turning vsync off for me, I definitely need it.
I also tried Mandrake 10.0 and Mandrake 10.2RC2.
RC2 was the same thing, 10.0 didn't work at all.

ps: I'm new to Linux and don't know very much about it. If you need
any logs or something, plz tell me.