I am working on some haswell systems running Ubuntu 12.04 and I have a
problem if I run aplay -D sysdefault.
when I do:
cat /proc/asound/pcm
I get:
00-03: HDMI 0 : HDMI 0 : playback 1 00-07: HDMI 1 : HDMI 1 : playback 1 00-08: HDMI 2 : HDMI 2 : playback 1 01-00: ALC662 rev3 Analog : ALC662 rev3 Analog : playback 1 : capture 1 01-02: ALC662 rev3 Analog : ALC662 rev3 Analog : capture 1
If I do:
aplay -L | grep sysdefault
I get:
sysdefault:CARD=PCH
where PCH is card number 1 (id = 1)
on most of my systems (non haswell laptops) the default card is number 0
If I run
aplay -D sysdefault
I get:
ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave aplay: main:682: audio open error: No such file or directory
if I strace it I get:
open("/dev/snd/pcmC0D0p", O_RDWR|O_NONBLOCK|O_CLOEXEC) = -1 ENOENT (No such file or directory)
defaults.pcm.dmix.device defaults.pcm.device
You have to change defaults.pcm.dmix.device to the device of your hdmi if your are not using the analog device 0