Running the power kernel with that settings now and the device is not rly idling anymore since PR1.3.
Should I change something with SmartRefllex ?

Nokia-N900:~# kernel-config show
current kernel configuration:
current frequency: 900
supported frequencies: 125 250 500 550 600 700 750 805 850 900 950 1000 1100 1150
min. frequency: 250
max. frequency: 900
avoid frequencies: 125
active frequencies: 0:22,90 250:30,180 500:33,360 550:33,400 600:36,430 700:42,430 750:44,430 805:47,430 850:48,500 900:52,500 950:54,500 1000:58,500 1100:63,520 1150:69,520
SmartReflex VDD1=0, VDD2=0
governor ondemand: ignore nice load= 1, up threshold= 75, sampling rate= 150000, powersave bias= 0