(In reply to Kajzer from comment #250)
> With kernels 3.17 and 3.18 I have freezes when playing some games, those
> freezes can happen somewhere between 10 minutes and 1 hour.
> Freeze occur only in games.
> With kernel 3.16 everything is normal and there are no freezes.
> Latest patch (auto->high and radeon.dpm=1) is used in each of those kernels.
> Everything else is exactly the same, just booting with different kernel
> makes a difference.

Can you bisect?