Been using ubuntu since the summer, though I switched to xubuntu. I got an Acer netbook a few days ago that, it turns out, has the notorious Cedarview/PowerVR hardware.
Now, it's a netbook. I didn't get it for playing 1080p video, but if I had I would have been much more annoyed. But having to adjust the brightness in the terminal is a wee bit frustrating. Editing the rc.local file works fine until you want to change the level, and coming out of suspend it resets to max.
So after a number of attempts, bricking the video, and much aggravation trying to use recovery mode, I tried Mint 13 Xfce. Especially since you get xfce 4.10 with the lts version, which does not work properly in xubuntu. That was encouraging. And I think that xfce 4.10 is definitely better than 4.08.
This morning I installed the cedarview packages from synaptic, and whaddya know. The brightness control from the keyboard works fine. Haven't done much more videon testing though. I just want this machine for knocking around.
I suppose there's an advantage to making more incremental upgrades as mint seems to. That's also one of the things I like about xfce.