[pulseaudio-discuss] [RFC] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_START failed (-77) proposed fix to check pcm state

[Takashi Iwai]

At Wed, 26 Nov 2014 16:54:53 +0800,
Raymond Yau wrote:
> 
> For those creative sound cards (e.g. emu10k1, ca0106) which use multi
> plugin for surround playback
> 
> It seem that set start_threshold to -1 has no effect on some devices (e.g.
> multi plugin) , the device seem  automatically started and pulseaudio does
> not check pcm state when calling snd_pcm_start
> 
> (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_START failed (-77)
> 
> Does it mean bug of multi plugin or start_threshold.have no effect on some
> devices/plugin ?

I'm not sure whether the value -1 is valid for start_threshold at
all.  Usually it's set between 1 and boundary.


Takashi