[alsa-devel] Problem opening default device in haswell system using aplay
Hi everyone,
sorry if this email has been sent twice... ( I sent it once before subscribing)
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)
If I run:
aplay -D hw:PCH,0
all works fine...
Any idea why hw:PCH,0 works and sysdefault does not?
I guess there could be a problem in the mapping of devices in hw systems?
Has anybody else observed a similar issue? Or has this been a problem in the past already fixed upstream? If so, where was it fixed (kernel, lib, tools, utils, etc.) ?
Thanks for all your help on this.
In case this is a real problem I am willing to help debugging it and submit patches.
Stefano
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
On 05/24/2013 03:18 AM, Raymond Yau wrote:
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
The problem I have is that the analog device is on card 1 as cat /proc/asound/pcm is showing:
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
At Wed, 22 May 2013 16:48:58 +0100, Stefano Panella wrote:
Hi everyone,
sorry if this email has been sent twice... ( I sent it once before subscribing)
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
It's because the card 0 contains only HDMI. The sysdefault in HDA-Intel.conf is configured for the analog I/O.
Takashi
On 05/27/2013 08:07 AM, Takashi Iwai wrote:
At Wed, 22 May 2013 16:48:58 +0100, Stefano Panella wrote:
Hi everyone,
sorry if this email has been sent twice... ( I sent it once before subscribing)
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
It's because the card 0 contains only HDMI. The sysdefault in HDA-Intel.conf is configured for the analog I/O.
Thanks for answering, what I do not get is what the default configuration is on a freshly installed system (no custom configurations):
- for example, can I assume hw:0,0 is always there and is the default? (apparently not on these haswell machine) - if I run aplay -D sysdefault is it expected to work? - is there any ALSA_CARD variable configured somewhere or is it just supposed to be 0? - how do I know what is it the default card/pcm?
The reasons I am asking these questions is I need to write some SW which will be able to open the default analog playback device and on haswell system I did not find any way to do that apart from using:
aplay -L | grep sysdefault
which will return <CARD> = PCH or Intel or MID etc.. and than I open hw:<CARD>,0 from the C code.
I would like to understand if I can poerform some more tests to understand if this is a genuine problem on haswell systems or if I am just making some wrong assumptions or incorrect use of the cmd_line/API.
Thanks again for helping me on this.
Takashi
participants (3)
-
Raymond Yau -
Stefano Panella -
Takashi Iwai