On Sat, Sep 17, 2011 at 8:38 AM, Thuban <thu...@singularity.fr> wrote: > So, here is the problem. St uses a lot of cpu with some apps that need > refresh, such as "top" or "mutt". The system becomes very slow, and Xorg > show a 100% cpu. > This problem only happen when I use the radeon driver, with > firmware-linux-nonfree. > I mean, there is no such problem without gpu acceleration (without > firmware-linux-nonfree), or with the proprietary fglrx.
As I don't experience this issue, I'll go with Kurt explanation. Try to run $ aafire -driver curses for some extreme fire action & cpu usage.