[Alsa-user] Aplay arecord ecasound - segmentation fault

[Pierre Lorenzon]

Hi all,

I installed alsa (1.0.17) (lib+plugins+utils). Kernel is
2.6.22.5 and gcc 4.1.2.

Installation worked well but now aplay generates a seg fault.
[EMAIL PROTECTED] ~]# aplay /usr/share/sounds/alsa/Front_Center.wav 
Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little 
Endian, Rate 48000 Hz, Mono
Segmentation fault
[EMAIL PROTECTED] ~]# 

Arecord does the same as well as alsaplayer ; and when trying
to use ecasound with alsa output, I get this seg fault as well.

Verry surprisingly, speech-dispatcher that runs too on this
machine works perfectly even if it does use alsa.

Has anybody an idea how to investigate this faillure ? I might
mention that with 1.0.13 the situation is the same.

Regards

Pierre


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Re: [Alsa-user] Aplay arecord ecasound - segmentation fault

[Pierre Lorenzon]

Hi 

Thanks for your answer since it let me at least partially solve
the problem : 

From: stan [EMAIL PROTECTED]
Subject: Re: [Alsa-user] Aplay arecord ecasound - segmentation fault
Date: Wed, 13 Aug 2008 11:43:56 -0700

 Pierre Lorenzon wrote:
  Hi all,
  
  I installed alsa (1.0.17) (lib+plugins+utils). Kernel is
  2.6.22.5 and gcc 4.1.2.
  
  Installation worked well but now aplay generates a seg fault.
  [EMAIL PROTECTED] ~]# aplay /usr/share/sounds/alsa/Front_Center.wav 
  Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit 
  Little Endian, Rate 48000 Hz, Mono
  Segmentation fault
  [EMAIL PROTECTED] ~]# 
  
  Arecord does the same as well as alsaplayer ; and when trying
  to use ecasound with alsa output, I get this seg fault as well.
 
 Are you running a sound server?  It can lock up the device, preventing 
 other applications from using it directly.


  No !
 
 What happens if you use the -vv option to the command?
 aplay -vv /usr/share/sounds/alsa/Front_Center.wav


  Verbose but still the seg fault !
 aplay -vv -Dhw:0,0 /usr/share/sounds/alsa/Front_Center.wav


  No seg fault but device is busy !
 aplay -vv -Dplughs:0,0
 /usr/share/sounds/alsa/Front_Center.wav


  Same as above !
 
 What does strace show?
 strace aplay /usr/share/sounds/alsa/Front_Center.wav



  In particular that the asound.conf and .asoundrc files are not
  loaded where I thought they were ! 
 
 Are there any messages in /var/log/messages related to alsa?


  No aparrently not !
 
 When you installed the library, did you check that everything went in 
 the right place?  Some distros move things.  The standard location for 
 alsa-lib files is in /usr/share/alsa.  Check that those files are the 
 files from the package.  Then search in /etc to see if they also exist 
 there.  If they do, either link or overwrite them with the latest 
 versions.  And ensure that there aren't any old library versions 
 around.  libasound usually resides in /usr/lib, but I have seen it in 
 /lib.  Is the linked version the version from your compile?  Did you 
 run an /sbin/ldconfig after you updated the library?

  I do not use any distro but simply folow blfs book
  indications. I tghink that things are at the good place. 


 
  
  Verry surprisingly, speech-dispatcher that runs too on this
  machine works perfectly even if it does use alsa.
 
 I wonder if it doesn't use OSS emulation?  Or perhaps it is using a 
 sound server via a plugin?

  I don't think so.


 
  
  Has anybody an idea how to investigate this faillure ? I might
  mention that with 1.0.13 the situation is the same.
  
  Regards
  
  Pierre
 
 It probably isn't necessary in this case, but could you run a script 
 which provides more information about your sound setup and post the 
 link back here?


  In fact I simply removed .asoundrc and it works now. I wrote
  this .asoundrc file following instructions on the
  alsa-project home page but it was for previous versions of
  alsa and it is possible that it is no longer
  compatible. Indeed I felt very convenient to use the dmix
  plugin and that's why I had this .asoundrc file. Now question
  is : do you know a good hint to write a correct .asoundrc
  file ?

  Regards

  Pierre


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Re: [Alsa-user] First post

[Pierre Lorenzon]

Hi,

It looks like to me such questions are well answered in the
blfs book. I personnaly think that the latter is a very good
tool to build his own custom distro.

Bests

Pierre


From: David Henderson dhender...@digital-pipe.com
Subject: [Alsa-user] First post
Date: Sun, 19 Jun 2011 14:41:08 -0400

 Hi everyone!  I'm currently expanding my knowledge of GNU/Linux to 
 include building packages from scratch towards an overall goal of a 
 custom distro.  So far, I have a nice base for a command line OS, but 
 want to expand into the multimedia aspect.  Alsa was my first (only?) 
 choice for the audio portion, but I'm running into problems.  The alsa 
 site is somewhat overwhelming to newbies and is easy to get lost.  I 
 have a few questions below from which I hope I can find help.  All 
 contributions are greatly appreciated. :)
 
 Thanks,
 Dave
 
 
 1) Currently I have downloaded alsa-driver, alsa-lib, and alsa-utils 
 packages.  Is there an order in which these packages need to be compiled 
 and installed?
 
 2) I'm currently running the relatively new Linux kernel 2.6.33 so do I 
 need the alsa-driver package?
 
 3) I've been able to successfully compile the alsa-lib package and 
 install it in the custom distro.  When I try to compile the alsa-utils 
 package, I constantly get the error:
 
 checking for libasound headers version = 1.0.16... not present.
 configure: error: Sufficiently new version of libasound not found.
 
 I'm actually using an existing Kubuntu installation to build the 
 packages for my custom distro.  As a result, after I compiled the newer 
 alsa-lib, I didn't install the package into the Kubuntu OS, but rather a 
 staging directory (/opt/staging/alsa).  I'm sure the reason this is 
 failing is because it's probably looking for /usr/lib/... or some other 
 default location.  How do I tell the configure script for the alsa-utils 
 to look in the staging directory for the header files it needs?
 
 
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Re: [Alsa-user] First post

[Pierre Lorenzon]

Hi,



From: David Henderson dhender...@digital-pipe.com
Subject: Re: [Alsa-user] First post
Date: Sun, 19 Jun 2011 15:28:48 -0400

 Thanks for the reply Pierre.  I checked into the blfs book, but
 it merely says these five chapters will cover alsa and then
 gives you a basic type configure  make.  This is obviously
 not going to answer the questions below. :) Any other thoughts?
 
 Dave
 
 
 On 06/19/2011 11:22 PM, Pierre Lorenzon wrote:
 Hi,

 It looks like to me such questions are well answered in the
 blfs book. I personnaly think that the latter is a very good
 tool to build his own custom distro.

 Bests

 Pierre


 From: David Hendersondhender...@digital-pipe.com
 Subject: [Alsa-user] First post
 Date: Sun, 19 Jun 2011 14:41:08 -0400

 Hi everyone!  I'm currently expanding my knowledge of GNU/Linux
 to
 include building packages from scratch towards an overall goal
 of a
 custom distro.  So far, I have a nice base for a command line
 OS, but
 want to expand into the multimedia aspect.  Alsa was my first
 (only?)
 choice for the audio portion, but I'm running into problems.
 The alsa
 site is somewhat overwhelming to newbies and is easy to get
 lost.  I
 have a few questions below from which I hope I can find help.
 All
 contributions are greatly appreciated. :)

 Thanks,
 Dave


 1) Currently I have downloaded alsa-driver, alsa-lib, and
 alsa-utils
 packages.  Is there an order in which these packages need to be
 compiled
 and installed?

This question is answered by the blfs book. First alsa-lib
and after alsa-utils.




 2) I'm currently running the relatively new Linux kernel 2.6.33
 so do I
 need the alsa-driver package?

No ! I am running a 2.6.32 kernel and never installed
alsa-driver. Anyway if the sound system is something very
exotic it might be necessary ...





 3) I've been able to successfully compile the alsa-lib package
 and
 install it in the custom distro.  When I try to compile the
 alsa-utils
 package, I constantly get the error:

 checking for libasound headers version= 1.0.16... not present.
 configure: error: Sufficiently new version of libasound not
 found.

 I'm actually using an existing Kubuntu installation to build
 the
 packages for my custom distro.  As a result, after I compiled
 the newer
 alsa-lib, I didn't install the package into the Kubuntu OS, but
 rather a
 staging directory (/opt/staging/alsa).  I'm sure the reason
 this is
 failing is because it's probably looking for /usr/lib/... or
 some other
 default location.  How do I tell the configure script for the
 alsa-utils
 to look in the staging directory for the header files it needs?

Humm ! I don't really understand this method. In my opinion
if you want to have a custom distro you first install a
basic systme on a partition or in a directory. Once the
basic system is installed (more or less the content of the
lfs book) you simply chroot to this new system to install
the rest of the stuff. Following this scheme there will be
no problem. I did it many times !

It leads me to a more global question : you say you want to
build a custom distro but do you have some kind of
documentation to do that ? If you plan to do that on your
own, it's a big deal ! Anyway I'll suggest you to have a
look at the lfs book. It might be that the installation
schedule suggested by the lfs team is not suitable for you
but in my opinion it is better to check this point before
reinventing the weel as we say in french !


Bests 

Pierre




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Re: [Alsa-user] First post

[Pierre Lorenzon]

From: James Shatto wwwshad...@gmail.com
Subject: Re: [Alsa-user] First post
Date: Sun, 19 Jun 2011 15:36:59 -0500

 A) If you want to overwrite your existing distro's versions, you
 probably want the --prefix=/usr option on your ./configure commands.
 If not, be sure to change your $PATH to look at /usr/local FIRST.
 
 B) Compile alsa-lib first, alsa-driver second.  Most compile options
 only need --prefix=/usr if you want to override the default of
 /usr/local.  But alsa-driver requires extra parms depending on what
 you want.  Some packages are only tool sets, so make -f Makefile?  And
 use them from where you made them, or copy/move them to more common
 $PATH's.
 
 C) You might have versioning conflicts depending on what you're trying
 to mix and match.  libc and other things might not work well together
 unless you're running the latest and greatest of every component.  And
 even that is problematic some of the time.
 
 D) unless you have a lot of time to waste, or just need the learning,
 I'd recommend going with existing distros.  There's enough of them
 that one might suit your current needs.  www.distrowatch.com
  I suggested something intermediary : lfs or gentoo which are
  easily customizable.

  Pierre




 
 HTH,
 - James
 
 
 
 On 6/19/11, David Henderson dhender...@digital-pipe.com wrote:
 Thanks for the reply Pierre.  I checked into the blfs book, but it
 merely says these five chapters will cover alsa and then gives you a
 basic type configure  make.  This is obviously not going to answer
 the questions below. :)  Any other thoughts?

 Dave


 On 06/19/2011 11:22 PM, Pierre Lorenzon wrote:
 Hi,

 It looks like to me such questions are well answered in the
 blfs book. I personnaly think that the latter is a very good
 tool to build his own custom distro.

 Bests

 Pierre


 From: David Hendersondhender...@digital-pipe.com
 Subject: [Alsa-user] First post
 Date: Sun, 19 Jun 2011 14:41:08 -0400

 Hi everyone!  I'm currently expanding my knowledge of GNU/Linux to
 include building packages from scratch towards an overall goal of a
 custom distro.  So far, I have a nice base for a command line OS, but
 want to expand into the multimedia aspect.  Alsa was my first (only?)
 choice for the audio portion, but I'm running into problems.  The alsa
 site is somewhat overwhelming to newbies and is easy to get lost.  I
 have a few questions below from which I hope I can find help.  All
 contributions are greatly appreciated. :)

 Thanks,
 Dave


 1) Currently I have downloaded alsa-driver, alsa-lib, and alsa-utils
 packages.  Is there an order in which these packages need to be compiled
 and installed?

 2) I'm currently running the relatively new Linux kernel 2.6.33 so do I
 need the alsa-driver package?

 3) I've been able to successfully compile the alsa-lib package and
 install it in the custom distro.  When I try to compile the alsa-utils
 package, I constantly get the error:

 checking for libasound headers version= 1.0.16... not present.
 configure: error: Sufficiently new version of libasound not found.

 I'm actually using an existing Kubuntu installation to build the
 packages for my custom distro.  As a result, after I compiled the newer
 alsa-lib, I didn't install the package into the Kubuntu OS, but rather a
 staging directory (/opt/staging/alsa).  I'm sure the reason this is
 failing is because it's probably looking for /usr/lib/... or some other
 default location.  How do I tell the configure script for the alsa-utils
 to look in the staging directory for the header files it needs?


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Re: [Alsa-user] intel hda vs asus xonar STX

[Pierre Lorenzon]

Hi Clemens,



From: Clemens Ladisch <cladi...@googlemail.com>
Subject: Re: [Alsa-user] intel hda vs asus xonar STX
Date: Mon, 28 Sep 2015 08:35:24 +0200

> Pierre Lorenzon wrote:
>> There are two sound card on the system. A chips on the mother
>> board which is driven as far as I know by an hda intel driver
>> and a PCI xonar STX card.
>>
>> On the first one mixing is possible : I mean that if a sound
>> process as aplay for instance is running and you start another
>> one like mplayer for instance sound is mixed and you might
>> listen to the two sources taht are played.
>>
>> With the xonar STX card it does not seem to be possible.
> 
> Neither hardware supports mixing.


  OK that's the first significant information !



> 
> Dmix (or PulseAudio) is enabled by default, but when you're



  I read taht here and there but did not know really how to
  activate it !




> using a device name like "hw" or "plughw" to access the other
> card, this is bypassed.  In theory, "default:X" or "dmix:X"


  OK I ignored this bypass.



> should work for any card.
> 
> Did you redefine the "default" ALSA device?  If not, do


  No I did not redefine anything !



> "aplay -D default:STX something.wav" and
> "mplayer -ao alsa:device=default=STX something.mp3" work?



  Clear it works. Only have now to tell to ecasound to do the
  same because output description is not exactly the same as in
  aplay or player but now I precisely know waht have to be
  done.


  Thanks and regards

  Pierre
> 
> 
> Regards,
> Clemens
> 
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Re: [Alsa-user] intel hda vs asus xonar STX

[Pierre Lorenzon]

Hi,

In fact I expected such an answer but I would like not use jack
or pulse if not necessary. If the asus xonar essence stx is
able to mix sources there's no need to use more only enable it.

Moreover if alsa is able to do the mix softly no need to had
anything to the system.


In this case you'll tell me simply to read carefully the xonar
stx documentation or how to set up dmix for this card.


Anyway it would be much more comfortable if someone already has
experience with taht whol stuff and can tell me.


Regards

Pierre 




From: Ralf Mardorf 
Subject: Re: [Alsa-user] intel hda vs asus xonar STX
Date: Sun, 27 Sep 2015 18:19:28 +0200

> Perhaps a sound server defaults to use the integrated sound device?
> Pulseaudio nowadays seems to be installed as the default sound server by
> most Linux distros that provide an out of the box working
> desktop environment and even for other distros it's an annoying
> dependency. For my Linux installs empty dummy packages fake to fulfil
> the pulseaudio dependency, while I'm using jackd to use several audio
> streams.
> 
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[Alsa-user] intel hda vs asus xonar STX

[Pierre Lorenzon]

Hi All,


My alsa version is 1.0.27 and my kernel version is 3.10.14.

There are two sound card on the system. A chips on the mother
board which is driven as far as I know by an hda intel driver
and a PCI xonar STX card.


On the first one mixing is possible : I mean that if a sound
process as aplay for instance is running and you start another
one like mplayer for instance sound is mixed and you might
listen to the two sources taht are played.


With the xonar STX card it does not seem to be possible. If an
aplay process is running and you try to start a mplayer process
for instance it failed with error message indicating taht the
device is busy.

I don't know where it comes from. Does the asus xonar STX card
not have natively ability to mix sound ? Does the driver not
implement this feature ? I know that in the past it might be
necessarry to activate something like dmix that was no longer
needed by newer chips since they have ability to mix without
any work of the driver.

Is it not the case with the xonar STX card and do I have to
setup something like dmix ?


Regards

Pierre

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Re: [Alsa-user] intel hda vs asus xonar STX

[Pierre Lorenzon]

Hi Vladimir,





From: Vladimir Mosgalin <mosga...@vm10124.spb.edu>
Subject: Re: [Alsa-user] intel hda vs asus xonar STX
Date: Mon, 28 Sep 2015 04:40:28 +0300

> Hi Pierre Lorenzon!
> 
>  On 2015.09.27 at 19:13:17 +0200, Pierre Lorenzon wrote next:
> 
>> In fact I expected such an answer but I would like not use jack
>> or pulse if not necessary. If the asus xonar essence stx is
>> able to mix sources there's no need to use more only enable it.
> 
> Xonar STX ("AV100" chip which is basically the same as C-media 8787)
> does not support mixing multiple sources. So you have to either use
> pulseaudio or rely on something like dmix.


  OK that's a very clear answer. In the passt I got dmix
  functionning for an old sound chipset that did not have
  mixing ability. In fact I forgot how I did that but I'll try
  to find it again.


  Thanks

  Pierre



> 
> (jack works too but I wouldn't recommend it unless you need low latency
> audio in professional audio-related applications, it can be a headache
> when used for typical multimedia tasks with random crappy software that
> wants to play audio)
> 
> Note that if you have first model of *STX*, not ST or second STX model
> (actually I'm not sure about second STX), for quality reasons you'd want
> to avoid 44100/88200/176400 audio sample rates, so instead of default
> pulse configuration when it tries to pick audio rate to avoid conversion
> (e.g. you're playing single stream of 44100 music in your audio player -
> it sets card audio rate to 44100 because card supports it), you should
> lock the rate to 96000 or 192000 instead, e.g.
> 
> default-sample-format = s24le
> default-sample-rate = 96000
> 
> in pulseaudio's daemon.conf
> 
> Lower audio quality and lower SNR in 44100 and multipies of it is quite
> audible. However, this only applies to PCI-E model (STX), PCI model (ST)
> has no problems with any rates.
> 
> -- 
> 
> Vladimir
> 
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