[LAU] Realtime Privilege, WAS:Re: OT: what is happening with RT kernel development?

[Kaj Ailomaa]

On Sat, 30 Mar 2013 02:05:18 +0100, <jonetsu at teksavvy.com> wrote:

> Le 29-03-2013 18:35, Kaj Ailomaa a écrit :
>
>> I'm fairly sure your m-audio card is at hw:1 in this case. There's no
>> guarantee in which order the cards end up at each boot.
>> To make sure you always start your m-audio card, I usually always use
>> the  name.
>
>> This means you don't have realtime privilege. You need to do two things.
>
>> First, make sure you have a file called
>> /etc/security/limits.d/audio.conf  with the contents (if you didn't
>> enable realtime privilege during install,  the file will be named
>> /etc/security/limits.d/audio.conf,disabled):
>
> The file was already as below.  So I ran the dpkg-reconfigure command in

If the file already existed, there was no need to run the command.

> there.  And I added my user name to the group file, and rebooted. Now  
> qjackctl shows all 1010LT ins and outs, so things are moving on.  There

this is simply because after you rebooted, your LT1010 became hw:0 instead  
of hw:1 as it was before.
As I said, the order in which the cards end up may be different at each  
boot. You can check the order, and the names doing:

cat /proc/asound/cards

> was no need to specify the card's name which is good in a sense, because  
> I do not know where to specify the name.  qjackctl does not seemingly  
> take a card name as a parameter.
>

You always need to specify which card you will run jack with. No matter  
how you start jack, with or without qjackctl.
In qjackctl, you do this from Setup -> Interface. "default" is the same as  
hw:0. I would change this to your card name, writing the name manually.

Again, the name can be gotten from doing: cat /proc/asound/cards

If my memory serves me correctly, your device is named simply LT1010, so,  
in qjackctl, instead of "default", or "hw:0", you would write "hw:LT1010".