NBFM problem with rtl_fm on Raspberry Pi 2

Hi, i'm experiencing problems demodulating (NB)FM with rtl_fm, when compiling directly on Raspberry Pi 2 with Raspbian: i just get noise! WBFM does work. And i tested many things like calibration, frequency, samplerate .. directly with a LPD (low power device). rtl_tcp works nice with SDR# and i can verify the calibration with it. In the end, i got paranoid and thought of compiler errors. So i tested the same on a Raspberry Pi (1) B+ with same Raspbian image: That works good. No problems! Anyone else experiencing the same problem? What is the solution? kind regards, Hayati