> Sounds indeed strange. Can you track is the pcm_file->substream getting > zeroed somewhere after it is set in snd_pcm_open_file? Like printing > both address of pcm_file and pcm_file->substream. > > I don't know, can we still have some instabilities with OMAP3 and > latest 2.6.27-rcx? That is my suspicion also. I have tracked things through the exit of snd_pcm_open_file and found the substream pointer to be valid to that point. The null substream pointer seems to be coming in to a snd_pcm_playback_ioctl call that occurs after the file open (I suspect from a call to snd_pcm_hw_info in alsa-lib) Looks like I need to start adding debug printf's in alsa-lib too. I'm working on this as a background task while bringing up some new hw so progress is a bit slow :-( Steve -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html