Never mind, I found this:
https://bugs.launchpad.net/ubuntu/+source/jockey/+bug/197639
and added "TexturedVideo" "on" to my xorg.conf and got it to work with
Catalyst 8.3.
I suppose it also works with 8.4 but I'm afraid to try it anymore
because I've worked with this thing for ages and
if it wouldn't work I'd throw my laptop out of the window.