#723 ALSA Error: "unable to open timer" using USB Sound Card

[Majid]

Hi
I am using a USB sound card in Linux openwrt. When I want to try using alsa-lib to play sounds or voices it prints an error and do nothing. I used aplay, baresip (a sip client use alsa) and also my own program using alsa-lib to play sound but the same problem occur:

ALSA lib pcm_direct.c:1137:(snd1_pcm_direct_initialize_poll_fd) unable to open timer 'hw:CLASS=3,SCLASS=0,CARD=0,DEV=0,SUBDEV=0'
ALSA lib pcm_dmix.c:1101:(snd_pcm_dmix_open) unable to initialize poll_fd

I can play the sounds via madplay, but not alsa players. Moreover, I could use alsamixer or alsactl to control the driver and sound card.

Here is my sound card listed byaplay -l

root@OpenWrt:~# aplay -l
* List of PLAYBACK Hardware Devices *
card 0: AUDIO [MV USB AUDIO], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0

It seems sonething wrong with enumerating the timer.