From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Panella Subject: Re: Problem opening default device in haswell system using aplay Date: Tue, 28 May 2013 10:26:09 +0100 Message-ID: <51A47831.20003@citrix.com> References: <519CE8EA.3010303@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from SMTP.EU.CITRIX.COM (smtp.eu.citrix.com [46.33.159.39]) by alsa0.perex.cz (Postfix) with ESMTP id 317502608D8 for ; Tue, 28 May 2013 11:21:43 +0200 (CEST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Takashi Iwai Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org 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 = PCH or Intel or MID etc.. and than I open hw:,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