Hello. I have the same problem. I didn't want to create new topic for this question so, My laptop is:
HP Pavilion dv6-6150sl
Intel core i5-2410m
8gb ramAMD Radeon HD 6770m.
I've tried everything to make desktop effects work, unsuccessfuly.
I think there are no drivers created for this card on linux. The one from amd website is not working, it doesn't install at all or installs but when i try to open catalyst control center it says "no amd graphics card found.." on other distros like ubuntu it prompts me "restricted drivers available.." i can't install them, they crash while installing.
But it should be possible to make my integrated Intel HD video card work. I had working desktop effects on linux mint KDE under intel hd, i didn't need to install any drivers, they came with mint installation. But i don't like mint kde. This distro seems very nice, so please help me

i'm still newbie to linux.
Oh, and how can i make this 32 bit system to read all of my ram? now it can see only 2.4gb.
Thank you