Hi community When doing development for Audio driver, I hit an interesting behaviour of pulseaudio Due to some miss configurations in devicetree, my CPU DAI driver always fail on hw_params() interface, when pulseaudio starts to configure driver for the first time, due to the problem in Driver configuration, it fails on hw_params interface. But instead of just exit from execution, (or just retry a few times) pulseaudio continues to retry SNDRV_PCM_IOCTL_HW_PARAMS ioctl call, with the following log message: ... ... I: [pulseaudio] alsa-util.c: snd_pcm_hw_params failed: Invalid argument I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on plug:hw:0: Invalid argument I: [pulseaudio] (alsa-lib)conf.c: Unknown parameters 0 I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM front:0 I: [pulseaudio] alsa-util.c: Error opening PCM device front:0: Invalid argument I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] alsa-util.c: snd_pcm_hw_params failed: Invalid argument I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] alsa-util.c: snd_pcm_hw_params failed: Invalid argument I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS failed (-22) ... ... as pulseaudio continues its retry of hw_params, it stops the whole system, which doesn't make sense for me. my question is: is this behaviour default for pulseaudio? can I change the retry number (for example, I want pulseaudio only retry a few times), or can I disable the retry mechanism at all? Thanks, Jiada
