1
I just booted up a raspberry pi using this image: ubuntu-16.04.3-preinstalled-server-armhf+raspi2.img
It seems that the sound card is not detected or configured 'out of the box'
root@ubuntu:/home/ubuntu# cat /proc/asound/cards
--- no soundcards ---
I do not have much experience with kernel modules or the tools used to load/remove them. I did learn that the the module for the raspberry pis sound card was not loaded though so I tried:
root@ubuntu:/home/ubuntu# modprobe snd_bcm2835
Seems to load fine:
root@ubuntu:/home/ubuntu# lsmod |grep snd
snd_bcm2835 32768 0
snd_pcm 106496 1 snd_bcm2835
snd_timer 32768 1 snd_pcm
snd 81920 3 snd_bcm2835,snd_timer,snd_pcm
soundcore 16384 1 snd
I also made sure alsa-utils was installed. But I still cannot play sound and still get the following results from these commands:
root@ubuntu:/home/ubuntu# cat /proc/asound/cards
--- no soundcards ---
-
root@ubuntu:/home/ubuntu# aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
-
root@ubuntu:/home/ubuntu# play nice.ambient.mp3
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4771:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default
play FAIL formats: can't open output file `default': snd_pcm_open error: No such file or directory
What is the correct procedure for ensuring the soundcard works for this image and that it works from boot?
BryanK
Posted 2017-09-28T16:38:55.197
Reputation: 141