Thank Takashi for your advice.

I check /proc/asound/card0/pcm0p/sub0/* files, buffer_sizes of both ALSA and OSS have integer period_size. Maybe other setting causes this issue, but I can not find it. Would you guys please help have a look at these file?

Thank you very much!

=========== ALSA hw_params =========== access: RW_INTERLEAVED format: S16_LE subformat: STD channels: 2 rate: 48000 (48000/1) period_size: 480 buffer_size: 9600

----------------- OSS hw_params --------------------- access: RW_INTERLEAVED format: S16_LE subformat: STD channels: 2 rate: 48000 (48000/1) period_size: 256 buffer_size: 5120 OSS format: S16_LE OSS channels: 2 OSS rate: 48000 OSS period bytes: 1024 OSS periods: 20 OSS period frames: 256

=========== ALSA sw_params =========== tstamp_mode: NONE period_step: 1 avail_min: 480 start_threshold: 9600 stop_threshold: 9600 silence_threshold: 0 silence_size: 0 boundary: 1258291200

----------------- OSS sw_params --------------------- tstamp_mode: NONE period_step: 1 avail_min: 1 start_threshold: 1 stop_threshold: 5120 silence_threshold: 272 silence_size: 272 boundary: 1342177280

=========== ALSA status ========== state: RUNNING trigger_time: 946744218.914947510 tstamp : 946744304.440704346 delay : 8924 avail : 676 avail_max : 1940 ----- hw_ptr : 4105180 appl_ptr : 4114104

---------------------- OSS status -------------------------- state: RUNNING trigger_time: 946744382.661376953 tstamp : 946744410.868988037 delay : 4908 avail : 212 avail_max : 4876 ----- hw_ptr : 1353952 appl_ptr : 1358860

============= ALSA OSS has same info ----------------------------- card: 0 device: 0 subdevice: 0 stream: PLAYBACK id: I2S HiFi I2S HiFi-PCM-0 name: subname: subdevice #0 class: 0 subclass: 0 subdevices_count: 1 subdevices_avail: 0

2008/9/3 Takashi Iwai tiwai@suse.de:- 显示引用文字 -