[linux-audio-dev] Alsa Problem

Hi, I'm still trying to grok alsa, and now I have the following problem: I'm using snd_pcm_writei to playback some audio, however, after a little time the call fails with the error: "File descriptor in bad state", which I believe I cannot recover from. Why does this happen, and what could I do about this? cat /proc/asound/card0/pcm0p/sub0/* prints the following stuff, I don't know whether this is helpful? access: MMAP_INTERLEAVED format: S16_LE subformat: STD channels: 2 rate: 48000 (48000/1) period_size: 8192 buffer_size: 16384 tick_time: 1000 card: 0 device: 0 subdevice: 0 stream: PLAYBACK id: VIA 8235 name: VIA 8235 subname: subdevice #0 class: 0 subclass: 0 subdevices_count: 4 subdevices_avail: 3 64 state: RUNNING trigger_time: 1143205215.076663000 tstamp : 1143205216.323831000 delay : 13856 avail : 2528 avail_max : 14368 ----- hw_ptr : 59872 appl_ptr : 73728 tstamp_mode: NONE period_step: 1 sleep_min: 0 avail_min: 8192 xfer_align: 8192 start_threshold: 1 stop_threshold: 16384 silence_threshold: 0 silence_size: 0 boundary: 1073741824