http://git.kernel.org/?p=linux/kernel/git/tiwai/sound.git;a=blob_plain;f=sound/pci/es1968.c
if OSS work well , add a constraint for period byte to force the driver
to behave similar to oss for the non interleaved capture
runtime->private_data = es;
runtime->hw = snd_es1968_capture;
runtime->hw.buffer_bytes_max = runtime->hw.period_bytes_max =
calc_available_memory_size(chip) - 1024; /* keep MIXBUF size */
snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES);
+
+ snd_pcm_hw_constraint_step(runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 256);
you can also apply the power2 constraints for the playback stream in
snd_es1968_playback_open
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https://bugs.launchpad.net/bugs/480543
Title:
pulseaudio unusable (es1968 driver on karmic)
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