Strange problem with radeon driver in Kubuntu

[schnelle]

The default profile is equivalent to disabling pm. The default profile leaves the card at it's default boot up power state.

But I have this strange problem with all profiles including default profile

Do you have any idea what could be going wrong? Even in clean installation of Natty the same thing described above is happening. It really pisses me off because my display have to be turned on all the time. If it goes to dpms off, music stops (it plays current song and than stops) and wireless internet connection is down (but dmesg shows nothing)

With fglrx I don't have this problem.