Re: emu10k1 & jackd not working with realtime Kernel

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2009/4/19 Sergei Steshenko <steshenko_sergei@xxxxxxx>:
> On Sun, 19 Apr 2009 19:01:48 +0200
> Matthias Mann <matthias-m@xxxxxxxx> wrote:
>
>> Hi,
>>
>> i had installed the realtime kernel 2.6.26.8-rt16 on a debian
>> linux 5.0 (Lenny). Cause jackd don't like realtime mode i've
>> searched on google and i found this page:
>>
>> http://www.alsa-project.org/main/index.php/Low_latency_howto
>>
>> Okay, that's great. I did all what is described in this howto,
>> except compiling and installing of the ALSA driver und libraries.
>> I thing the debian packages should do the same, or not?
>>
>> But i can do what i want (had googled and googled and so on
>> and i tried much more) but if i like to start jackd with -R option i
>> always get this message:
>>
>> cannot use real-time scheduling (FIFO at priority 10) [for thread
>> 1988003552, from thread 1988003552] (1: Operation not permitted)
>>
>> My soundcard is a soundblaster live Platinum. Version of jackd
>> is 0.109.2
>>
>> Do you have any idea?
>>
>> Much greetings,
>> Matthias
>>
>
> I vaguely remember that you have to add your user ID to "audio" group
> or something like this.
>
> The point is that increasing priority normally requires root
> privileges, and in order to enable doing this by non-root that group
> was created.
>
> Regards,
>  Sergei.

Hi Sergei. Yes this helps a bit. Just now i've tried to run jackd -R [...] as
root and it worked :-)

But then the normal user can't use jackd und it's surely not a good idea
to run jackd as root. I only did this for testing.

And now, what should i do? I have the group audio and the normal user
is a member of group audio since a long time. But jackd doesn't run in
realtime for this user. What's going wrong here?

Best regards,
Matthias

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