Pharaoh . wrote: > Registering the sound card > pcm->private in snd_device_register_all is c1d7d310 //correct > Inside snd_pcm_dev_register, pcm is c1f05d44(correct), pcm->pvt_data > is 00000000(This shouldn't be NULL) Does the value of pcm itself change? Do other fields in pcm change? Regards, Clemens