Re: AMD and Ubuntu
Slightly off topic, but it'it may be worth my clarifying this for anybody else who's uncertain.
AMD's *G terminology is used for on-core APU graphics. In my book, that counts as integrated graphics, not discrete graphics. This is because there is no separate graphics card.
On AMD's website, their blurb goes as such: "with the phenomenal discrete-level performance of AMD Radeon™ HD Graphics." (Emphasis added). I.e., they're claiming the performance is at the level of discrete cards, not that it is discrete. It's actually integrated APU graphics.
As for its support; I'm afraid I don't know outright. I would expect it to be supported in their proprietary fglrx drivers, but how long that will run before they drop support is anybody's guess. The fallback is the open-source drivers, which are fine in a sense, but just rather non-performant in comparison.
As 3Miro intimated towards, how wise a move it is somewhat depends what you're planning to do with your laptop - gaming, per chance?
Ace1 FreeBSD/Gnome 2, i5 2300, 16GB, HX750W, 20TB ZFS pool, 60GB SSD, Fractal Design XL
Ace2 Ubuntu/Xubuntu, i7 2600, 16GB, HX850W, 4TB, Asus HD6970, Fractal Design R3
Ace3 Ubuntu/XFCE, E7200, 4GB, OCZ GameXStream 700W, 8TB