Fedora 17

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Fedora 17

István Király - LaKing


Hello list, ...


It seems to me that there is some Jack system-configuartion issue with Fedora 17.

I'm trying to setup Ardour with a Gina24 soundcard, but have problems with it.

Ardour struggles, slowdown with digital soundeffect - ALSA, Gina24 from Echo, Fedora 17
http://ardour.org/node/5434





Could someone provide me with some information how to troubleshoot that problem?


Thank you.

[hidden email]
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www.D250.hu
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Re: Fedora 17

Brendan Jones-2
On 09/03/2012 05:45 PM, István Király - LaKing wrote:

>
>
> Hello list, ...
>
>
> It seems to me that there is some Jack system-configuartion issue with Fedora 17.
>
> I'm trying to setup Ardour with a Gina24 soundcard, but have problems with it.
>
> Ardour struggles, slowdown with digital soundeffect - ALSA, Gina24 from Echo, Fedora 17
> http://ardour.org/node/5434
>
>
>
>
>
> Could someone provide me with some information how to troubleshoot that problem?
>
>

I recommend filing a bug against Fedora first.

Remember to submit output of alsa-info, ensure pulseaudio is not getting
in the way,
disable desktop effects (if KDE) and we'll take it from there
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Re: Fedora 17

Jeremy Jongepier
In reply to this post by István Király - LaKing
On 09/03/12 17:45, István Király - LaKing wrote:

>
>
> Hello list, ...
>
>
> It seems to me that there is some Jack system-configuartion issue with Fedora 17.
>
> I'm trying to setup Ardour with a Gina24 soundcard, but have problems with it.
>
> Ardour struggles, slowdown with digital soundeffect - ALSA, Gina24 from Echo, Fedora 17
> http://ardour.org/node/5434
>
>
>
>
>
> Could someone provide me with some information how to troubleshoot that problem?
>
>
> Thank you.
>
> [hidden email]
> D250 Laboratories
> www.D250.hu

Hello István,

There are already very knowledgeable folks helping out on ardour.org.
I'd follow their suggestions, especially on prioritizing the softirq of
your Gina24. It is sharing it's IRQ with your nvidia GPU and that's
asking for trouble (at least, I have had a lot of issues with it).
So you'll need rtirq, you can find info on how to use it here:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration#rtirq

Could be that rtirq is a bit different on F17, some changes have been
made to the script after I wrote the rtirq section on the LinuxMusicians
wiki.

Best,

Jeremy
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Re: Fedora 17

Brendan Jones-2
On 09/05/2012 09:41 AM, Jeremy Jongepier wrote:

> On 09/03/12 17:45, István Király - LaKing wrote:
>>
>>
>> Hello list, ...
>>
>>
>> It seems to me that there is some Jack system-configuartion issue with
>> Fedora 17.
>>
>> I'm trying to setup Ardour with a Gina24 soundcard, but have problems
>> with it.
>>
>> Ardour struggles, slowdown with digital soundeffect - ALSA, Gina24
>> from Echo, Fedora 17
>> http://ardour.org/node/5434
>>
>>
>>
>>
>>
>> Could someone provide me with some information how to troubleshoot
>> that problem?
>>
>>
>> Thank you.
>>
>> [hidden email]
>> D250 Laboratories
>> www.D250.hu
>
> Hello István,
>
> There are already very knowledgeable folks helping out on ardour.org.
> I'd follow their suggestions, especially on prioritizing the softirq of
> your Gina24. It is sharing it's IRQ with your nvidia GPU and that's
> asking for trouble (at least, I have had a lot of issues with it).
> So you'll need rtirq, you can find info on how to use it here:
> http://wiki.linuxmusicians.com/doku.php?id=system_configuration#rtirq
>
> Could be that rtirq is a bit different on F17, some changes have been
> made to the script after I wrote the rtirq section on the LinuxMusicians
> wiki.
>
> Best,
>
> Jeremy
> _______________________________________________
> Jack-Devel mailing list
> [hidden email]
> http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org
Thanks Jeremy - rtirq is now in the proper Fedora repos (was in CCRMA
before).

István, let me know how you go - the nature of the package means its not
going to work out of the box for all hardware, but I'd love to get your
feedback on it (I'm maintaining it in Fedora).

But seriously, raise a bug and others can benefit

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Re: Fedora 17

Brendan Jones-2
In reply to this post by Jeremy Jongepier
On 09/05/2012 09:41 AM, Jeremy Jongepier wrote:

> On 09/03/12 17:45, István Király - LaKing wrote:
>>
>>
>> Hello list, ...
>>
>>
>> It seems to me that there is some Jack system-configuartion issue with
>> Fedora 17.
>>
>> I'm trying to setup Ardour with a Gina24 soundcard, but have problems
>> with it.
>>
>> Ardour struggles, slowdown with digital soundeffect - ALSA, Gina24
>> from Echo, Fedora 17
>> http://ardour.org/node/5434
>>
>>
>>
>>
>>
>> Could someone provide me with some information how to troubleshoot
>> that problem?
>>
>>
>> Thank you.
>>
>> [hidden email]
>> D250 Laboratories
>> www.D250.hu
>
> Hello István,
>
> There are already very knowledgeable folks helping out on ardour.org.
> I'd follow their suggestions, especially on prioritizing the softirq of
> your Gina24. It is sharing it's IRQ with your nvidia GPU and that's
> asking for trouble (at least, I have had a lot of issues with it).
> So you'll need rtirq, you can find info on how to use it here:
> http://wiki.linuxmusicians.com/doku.php?id=system_configuration#rtirq
>
> Could be that rtirq is a bit different on F17, some changes have been
> made to the script after I wrote the rtirq section on the LinuxMusicians
> wiki.
>
> Best,
>
> Jeremy
> _______________________________________________
> Jack-Devel mailing list
> [hidden email]
> http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org
Oh, and you need to add threadirqs to your kernel parameters for rtirq
to work
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Re: Fedora 17

István Király - LaKing
In reply to this post by Brendan Jones-2
Installed, set up, and running rtirq, .. sitation is not really better, but its possibly around the problem. Pleas see the post here:
http://ardour.org/node/5434#comment-30072

>> rtirq is now in the proper Fedora repos
I could not find such a package, with yum/yumex. Installed an rpm.

So far, no success. Nothing works with Jack at the moment for me, for any of my sound cards.

I keep on fighting, and I don't really want to give up, .. but I don't see a strategy how to narrow down the problem.

 

[hidden email]


D250 Laboratories
www.D250.hu


----- Ursprüngliche Message -----
Von: Brendan Jones <[hidden email]>
An: [hidden email]
CC:
Gesendet: 11:07 Mittwoch, 5.September 2012
Betreff: Re: [Jack-Devel] Fedora 17

On 09/05/2012 09:41 AM, Jeremy Jongepier wrote:

> On 09/03/12 17:45, István Király - LaKing wrote:
>>
>>
>> Hello list, ...
>>
>>
>> It seems to me that there is some Jack system-configuartion issue with
>> Fedora 17.
>>
>> I'm trying to setup Ardour with a Gina24 soundcard, but have problems
>> with it.
>>
>> Ardour struggles, slowdown with digital soundeffect - ALSA, Gina24
>> from Echo, Fedora 17
>> http://ardour.org/node/5434
>>
>>
>>
>>
>>
>> Could someone provide me with some information how to troubleshoot
>> that problem?
>>
>>
>> Thank you.
>>
>> [hidden email]
>> D250 Laboratories
>> www.D250.hu
>
> Hello István,
>
> There are already very knowledgeable folks helping out on ardour.org.
> I'd follow their suggestions, especially on prioritizing the softirq of
> your Gina24. It is sharing it's IRQ with your nvidia GPU and that's
> asking for trouble (at least, I have had a lot of issues with it).
> So you'll need rtirq, you can find info on how to use it here:
> http://wiki.linuxmusicians.com/doku.php?id=system_configuration#rtirq
>
> Could be that rtirq is a bit different on F17, some changes have been
> made to the script after I wrote the rtirq section on the LinuxMusicians
> wiki.
>
> Best,
>
> Jeremy
> _______________________________________________
> Jack-Devel mailing list
> [hidden email]
> http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org
Thanks Jeremy - rtirq is now in the proper Fedora repos (was in CCRMA
before).

István, let me know how you go - the nature of the package means its not
going to work out of the box for all hardware, but I'd love to get your
feedback on it (I'm maintaining it in Fedora).

But seriously, raise a bug and others can benefit

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Re: Fedora 17

Jeremy Jongepier
On 09/05/12 15:53, István Király - LaKing wrote:
> I could not find such a package, with yum/yumex. Installed an rpm.
>
> So far, no success. Nothing works with Jack at the moment for me, for any of my sound cards.
>
> I keep on fighting, and I don't really want to give up, .. but I don't see a strategy how to narrow down the problem.

You could try the nouveau driver instead of the proprietary nvidia one.

Best,

Jeremy
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Re: Fedora 17

Brendan Jones-2
In reply to this post by István Király - LaKing
On 09/05/2012 03:53 PM, István Király - LaKing wrote:

> Installed, set up, and running rtirq, .. sitation is not really better, but its possibly around the problem. Pleas see the post here:
> http://ardour.org/node/5434#comment-30072
>
>>> rtirq is now in the proper Fedora repos
> I could not find such a package, with yum/yumex. Installed an rpm.
>
> So far, no success. Nothing works with Jack at the moment for me, for any of my sound cards.
>
> I keep on fighting, and I don't really want to give up, .. but I don't see a strategy how to narrow down the problem.
>

Make sure pulseaudio is not getting in the way. edit
~/.pulse/client.conf to read

autospawn=no

Then issue pulseaudio --kill

Rather than using the default device list in qjackctl, select hw:___
where ___ is the alsa name of your card.

cat /proc/asound/cards

Use that as your device in jack (within []'s)


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Re: Fedora 17

Chris Caudle
In reply to this post by Brendan Jones-2
On Wed, September 5, 2012 4:09 am, Brendan Jones wrote:
> Oh, and you need to add threadirqs to your kernel parameters for rtirq
> to work

If the original system description was sent to this list, I missed it.  Is
the original poster running a -rt kernel, or a custom compiled kernel?

The standard Fedora kernel is not compiled with preemption enabled, and if
I understand correctly the threadirqs kernel parameter does not have an
effect unless the kernel was configured with preemption enabled (also
labeled as low latency configuration, or perhaps low latency desktop, I
forget the exact wording in the description).

--
Chris Caudle


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Re: Fedora 17

István Király - LaKing
The configuration has almost perfect status. It works for a few seconds, on a lucky run it runs for over a minute, .. therefore I think it is most likely a bug, or a system-configuration issue, that does not prevent Jack and the soundcard from running, but it does not work seamlessly as expected. when the struggle starts, it is on a low-level, .. not a latency/period issue, or anything that can be tuned in QJackCtl. IMO.


The two key point we hold in hand here - in my opinion:

- The Transport, eg. the Timeline, slows down / struggles as well, in Ardour, but not in Rosegarden, whereby both produce the same error-sound-effect.

- Pulseaudio uses the ALSA driver perfectly. I can listen to radio on VLC for hours, without any issues.


Should an issue with IRQ's and such not affect Pulseaudio as well?



@Chris:
>>If the original system description was sent to this list, I missed it.  

I came from the Ardour forum, when I realized that this is a jack issue, and not an Ardour issue.


>>Is the original poster running a -rt kernel, or a custom compiled kernel?
 
I'm the original poster, having the issue, .. It is a default fedora kernel, .. I have now 3 of them. Latest is 3.5.3-1.fc17.x86_64 ...
in general all packages except Ardour 3 Beta are Fedora packages, .. from default repo's, or rpmfusion, ...

Here some spec's:
15.6 GiB Memory, Intel® Core™ i7-2600K CPU @ 3.40GHz × 8, Asus P8H67 board,

We are dealing with the Echo audio gina24 sound card primary. on Alsa-level it works like a charm. Echomixer 1.0.5 works, I see the metering.

As far as I see, threadirqs seems to work.

Here is the thread on Ardour forums, that has more detailed info's. http://ardour.org/node/5434#comment-30073


@Brendan

Pulse audio seems to be irrelevant. It is the same even with Pulseaudio uninstalled.

It does not matter if it is hw:0 hw:0,0 or hw:Gina24 ... I gave all versions a try, and all behave the same.

@Jeremy

With the nVidia drivers completely uninstalled, nouveau drivers take the spot, and take the same IRQ. Same error-effect.





Is there a way to playback a wave file with Jack in init-3? Without having any desktop, just a root console?


Thanks for all tips and tricks.


[hidden email]


D250 Laboratories
www.D250.hu


----- Ursprüngliche Message -----
Von: Chris Caudle <[hidden email]>
An: [hidden email]
CC:
Gesendet: 16:27 Mittwoch, 5.September 2012
Betreff: Re: [Jack-Devel] Fedora 17

On Wed, September 5, 2012 4:09 am, Brendan Jones wrote:
> Oh, and you need to add threadirqs to your kernel parameters for rtirq
> to work

If the original system description was sent to this list, I missed it.  Is
the original poster running a -rt kernel, or a custom compiled kernel?

The standard Fedora kernel is not compiled with preemption enabled, and if
I understand correctly the threadirqs kernel parameter does not have an
effect unless the kernel was configured with preemption enabled (also
labeled as low latency configuration, or perhaps low latency desktop, I
forget the exact wording in the description).

--
Chris Caudle


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Re: Fedora 17

Jeremy Jongepier
On 09/05/2012 05:39 PM, István Király - LaKing wrote:
> @Jeremy
>
> With the nVidia drivers completely uninstalled, nouveau drivers take the spot, and take the same IRQ. Same error-effect.
>

It was worth a shot. So it's probably not the GPU or the driver for the GPU.

>
> Is there a way to playback a wave file with Jack in init-3? Without having any desktop, just a root console?

Yes, you can start JACK in a virtual terminal and play back a wave file
with mplayer for instance:
mplayer -ao jack yourwavefile.wav

Best,

Jeremy

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Re: Fedora 17

Fernando Lopez-Lezcano
In reply to this post by Brendan Jones-2
On 09/05/2012 07:12 AM, Brendan Jones wrote:

> On 09/05/2012 03:53 PM, István Király - LaKing wrote:
>> Installed, set up, and running rtirq, .. sitation is not really
>> better, but its possibly around the problem. Pleas see the post here:
>> http://ardour.org/node/5434#comment-30072
>>
>>>> rtirq is now in the proper Fedora repos
>> I could not find such a package, with yum/yumex. Installed an rpm.
>>
>> So far, no success. Nothing works with Jack at the moment for me, for
>> any of my sound cards.
>>
>> I keep on fighting, and I don't really want to give up, .. but I don't
>> see a strategy how to narrow down the problem.
>>
>
> Make sure pulseaudio is not getting in the way. edit
> ~/.pulse/client.conf to read
>
> autospawn=no
>
> Then issue pulseaudio --kill

I never have to do that.

> Rather than using the default device list in qjackctl, select hw:___
> where ___ is the alsa name of your card.

In my case this is always a _must_, you should always point jackd to use
hw:xxx

I would try starting jackd in a terminal with minimal parameters, for
example:

   jackd -R -d alsa -d hw:0

(or whatever name your soundcard has)

-- Fernando


> cat /proc/asound/cards
>
> Use that as your device in jack (within []'s)
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Re: Fedora 17

István Király - LaKing
>> I would try starting jackd in a terminal with minimal parameters,

.. I try to start a simple playback from console, with minimal fanciness: jack and aplay


[x@casino ~]$  jackd -r -d alsa -d hw:Gina24
jackdmp 1.9.8
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2011 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
no message buffer overruns
JACK server starting in non-realtime mode
audio_reservation_init
Acquire audio card Audio1
creating alsa driver ... hw:Gina24|hw:Gina24|1024|2|48000|0|0|nomon|swmeter|-|32bit
configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
ALSA: final selected sample format for capture: 32bit integer little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 32bit integer little-endian
ALSA: use 2 periods for playback
...
Unknown destination port in attempted (dis)connection src_name [alsa-jack.jackP.5675.0:out_000] dst_name [alsa_pcm:playback_1]

[x@casino ~]$ aplay -D jack /home/x/test32s.wav
jack_client_new: deprecated
Playing WAVE '/home/x/test32s.wav' : Float 32 bit Little Endian, Rate 48000 Hz, Stereo
cannot connect alsa-jack.jackP.5716.0:out_000 to alsa_pcm:playback_1
aplay: pcm_write:1710: write error: Input/output error



At the moment I could not figure out how to start a playback from console. Any suggestions how to?

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Re: Fedora 17

Paul Davis


On Thu, Sep 6, 2012 at 9:08 AM, István Király - LaKing <[hidden email]> wrote:
>> I would try starting jackd in a terminal with minimal parameters,

.. I try to start a simple playback from console, with minimal fanciness: jack and aplay

you appear to be trying to use a ~/.asoundrc file that defines ports with names like alsa_pcm:playback_1

this is wrong. the names should be system:playback_1

that may not be your only problem. i suggest you post your ~/.asoundrc file and/or compare it to the one in the JACK FAQ at http://jackaudio.org/faq

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Re: Fedora 17

Jeremy Jongepier
In reply to this post by István Király - LaKing
On 09/06/12 15:08, István Király - LaKing wrote:
> At the moment I could not figure out how to start a playback from console. Any suggestions how to?

Try it with mplayer:
mplayer -ao jack yourwavefile.wav

Best,

Jeremy
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Re: Fedora 17

István Király - LaKing
In reply to this post by Paul Davis
I was able to playback from console with the command:

cvlc --jack-auto-connect file:///home/x/test.wav

.. it struggles, ofc, as all other applications. (jackd -r -d alsa -d hw:Gina24   .. gave no errors in the console)

@Jeremy mplayer seems to be complied without jack in Fedora. .. but thanks to the suggestion, I try ed it, ..


@Paul

I think you probably meant http://alsa.opensrc.org/.asoundrc

[root@casino ~]# locate asoundrc
/usr/share/doc/alsa-lib-1.0.25/asoundrc.txt

.. I don't have such a file, but as I read on the wiki, I don't need one, ..

Some interesting files are:
/etc/asound.conf
.. empty, only a comment: # Place your global alsa-lib configuration here...


/var/lib/alsa/asound.state
.. seems to describe the current state of all soundcard's.


The script that generates asoundrc from the wiki created:


pcm.NVidia { type hw; card NVidia; }
ctl.NVidia { type hw; card NVidia; }
pcm.Gina24 { type hw; card Gina24; }
ctl.Gina24 { type hw; card Gina24; }
pcm.External { type hw; card External; }
ctl.External { type hw; card External; }
pcm.U0x46d0x8c9 { type hw; card U0x46d0x8c9; }
ctl.U0x46d0x8c9 { type hw; card U0x46d0x8c9; }
pcm.!default pcm.Gina24
ctl.!default ctl.Gina24



>> system:playback_1


I could not find any files with find-in-files techniques that are responsible for this naming. I guess this must happen in some in binary form, ..



By the way, the system feels like it is responding a little bit slower, when jack is running in any form. (Console characters appear with some latency :)




Open to any suggestions, ...



[hidden email]
D250 Laboratories
www.D250.hu


________________________________
Von: Paul Davis <[hidden email]>
An: István Király - LaKing <[hidden email]>
CC: "[hidden email]" <[hidden email]>
Gesendet: 15:15 Donnerstag, 6.September 2012
Betreff: Re: [Jack-Devel] Fedora 17





On Thu, Sep 6, 2012 at 9:08 AM, István Király - LaKing <[hidden email]> wrote:

>> I would try starting jackd in a terminal with minimal parameters,
>
>.. I try to start a simple playback from console, with minimal fanciness: jack and aplay
>

you appear to be trying to use a ~/.asoundrc file that defines ports with names like alsa_pcm:playback_1

this is wrong. the names should be system:playback_1

that may not be your only problem. i suggest you post your ~/.asoundrc file and/or compare it to the one in the JACK FAQ at http://jackaudio.org/faq 

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Re: Fedora 17

Paul Davis


On Thu, Sep 6, 2012 at 10:38 AM, István Király - LaKing <[hidden email]> wrote:
I was able to playback from console with the command:

cvlc --jack-auto-connect file:///home/x/test.wav

.. it struggles, ofc, as all other applications. (jackd -r -d alsa -d hw:Gina24   .. gave no errors in the console)

@Jeremy mplayer seems to be complied without jack in Fedora. .. but thanks to the suggestion, I try ed it, ..


@Paul

I think you probably meant http://alsa.opensrc.org/.asoundrc

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Re: Fedora 17

István Király - LaKing
I set up the rawjack as described there, with the default device settings. Rebooted.

[x@casino ~]$ aplay -D pcm.jack /home/x/test.wav
ALSA lib pcm_plug.c:1273:(_snd_pcm_plug_open) Unknown field playback_ports
aplay: main:682: audio open error: Invalid argument

 .. same error with aplay, if jack is running or not. unfortunately that error does not say to me too much.


[x@casino ~]$ aplay /home/x/test32s.wav
jack_client_new: deprecated
Playing WAVE '/home/x/test32s.wav' : Float 32 bit Little Endian, Rate 48000 Hz, Stereo


Is playing back the wave file with the struggle-error-effect, .. only when jack is running.

I was experimenting a little with VLC and it's output setting. If jack is in between, the struggle error always show's up, unless jack is not running, but I guess that is VLC's fallback to default, and not that rawjack route.




If I understand your suggestion right, this would be a routing technique, to get over possible naming problems. I'm not sure this is relevant.
After a reboot, starting jack, starting VLC with Jack output, playback was smooth as it suppose to be for exactly 28 seconds. Then struggle, and struggle and struggle, ...for me appears te be more like a bug, then an incorrect routing-naming issue.

In theory, I should use the Gina24 directly, no?



I uploaded a sample wave-file that I recorded from the Gina's output while playing back just the tick and then a wave file with Ardour, and uploaded some sample alsa-info.txt files as well.


http://laking.d250.hu/laking/debug/

For me intresting looks this:
[ 1030.548002] ALSA sound/pci/echoaudio/echoaudio_dsp.c:850 start_transport 10001
[ 1087.070791] IRQ 16 might be stuck.  Polling

.. if this would be a lottery, I would tip for a bug somwhere on that IRQ-soundcard-driver-jack level.


Please correct me if I'm wrong.



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________________________________
Von: Paul Davis <[hidden email]>
An: István Király - LaKing <[hidden email]>
CC: "[hidden email]" <[hidden email]>
Gesendet: 16:43 Donnerstag, 6.September 2012
Betreff: Re: [Jack-Devel] Fedora 17





On Thu, Sep 6, 2012 at 10:38 AM, István Király - LaKing <[hidden email]> wrote:

I was able to playback from console with the command:

>
>cvlc --jack-auto-connect file:///home/x/test.wav
>
>.. it struggles, ofc, as all other applications. (jackd -r -d alsa -d hw:Gina24   .. gave no errors in the console)
>
>@Jeremy mplayer seems to be complied without jack in Fedora. .. but thanks to the suggestion, I try ed it, ..
>
>
>@Paul
>
>I think you probably meant http://alsa.opensrc.org/.asoundrc
>

no, i meant:

http://jackaudio.org/routing_alsa    

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Re: Fedora 17

Adrian Knoth
On Thu, Sep 06, 2012 at 09:09:58AM -0700, István Király - LaKing wrote:

> In theory, I should use the Gina24 directly, no?

If this means to ignore asoundrc altogether, then yes.

> For me intresting looks this:
> [ 1030.548002] ALSA sound/pci/echoaudio/echoaudio_dsp.c:850 start_transport 10001
> [ 1087.070791] IRQ 16 might be stuck.  Polling

I haven't read the thread, so I don't know if pulseaudio is working on
your card or not. If not, then it's very likely an ALSA error or HW
problem.

Assuming PA works and only jack has problems: did you try adding -S to
jackd's ALSA arguments? Occasionally, drivers fail to work reliably with
32bit floats, so using 16bit integer might help:

   jackd -d alsa -d hw:ginawhatever -S



Cheers

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Re: Fedora 17

István Király - LaKing


>>I haven't read the thread, so I don't know if pulseaudio is working on
your card or not.

Yes, its working perfectly.


>>Assuming PA works and only jack has problems: did you try adding -S to jackd's ALSA arguments?  jackd -d alsa -d hw:ginawhatever -S

Yes, as suggested by joegiampaoli, tried with the -S option.


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