My 655 will be a triboot including Debian 7 (wheezy) and Ubuntu.
This post is part 1 of a series of posts about Ubuntu on the HP 655
Grainy display - resolution or driver?One thing that folks jump for right after install, if they are planning on actively gaming, is to think about installing fglrx in place of the open source driver.
Just making this change (selecting 1366x768) seemed to improve things a whole lot.
( Remember to hit 'Keep this configuration' once you are happy with things )
In a later post I may experiment with enabling ATI own fglrx driver for this E2-1800 APU, but it is not strictly necessary for a laptop I use mainly for business.