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Old 05-08-2008, 01:34 PM
atuc
 
Default normal kernel better than rt kernel on hardy?

hallo,

i am really astonished, i tried both the hardy rt kernel and the
standard kernel 2.6.24-16-generic and i get no xrun on the standard
kernel with 34.8 ms latency,

the realtime kernel 2.6.24-16-rt produces xruns every 30-60 sec. with
the same parameters??

does anybody know why? as i remember the feisty 2.6.22-14 rt kernel
worked better with about ~ 10 ms latency on my macbook an my usb m-audio
fasttrack pro.


my jackd:
/usr/bin/jackd -R -P89 -p512 -t2000 -dalsa -r44100 -p512 -n3 -D -Chw:4,1
-Pmulti

best,
alex

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Old 05-08-2008, 03:00 PM
Fabien Juchniewicz
 
Default normal kernel better than rt kernel on hardy?

For my config, I have to stop network manager...



Le jeudi 08 mai 2008 à 15:34 +0200, atuc a écrit :


hallo,

i am really astonished, i tried both the hardy rt kernel and the
standard kernel 2.6.24-16-generic and i get no xrun on the standard
kernel with 34.8 ms latency,

the realtime kernel 2.6.24-16-rt produces xruns every 30-60 sec. with
the same parameters??

does anybody know why? as i remember the feisty 2.6.22-14 rt kernel
worked better with about ~ 10 ms latency on my macbook an my usb m-audio
fasttrack pro.


my jackd:
/usr/bin/jackd -R -P89 -p512 -t2000 -dalsa -r44100 -p512 -n3 -D -Chw:4,1
-Pmulti

best,
alex





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Old 05-08-2008, 03:25 PM
altern
 
Default normal kernel better than rt kernel on hardy?

i have same problem but with feisty. the rt kernel produces more
glitches and jack/freebob are really unstable. I think it might be
because i installed Ubuntu Feisty and apt-get the Studio metapackages,
there was a mail this week about this not being good idea. Maybe you did
this as well?

enrike

Fabien Juchniewicz(e)k dio:
> For my config, I have to stop network manager...
>
> Le jeudi 08 mai 2008 à 15:34 +0200, atuc a écrit :
>> hallo,
>>
>> i am really astonished, i tried both the hardy rt kernel and the
>> standard kernel 2.6.24-16-generic and i get no xrun on the standard
>> kernel with 34.8 ms latency,
>>
>> the realtime kernel 2.6.24-16-rt produces xruns every 30-60 sec. with
>> the same parameters??
>>
>> does anybody know why? as i remember the feisty 2.6.22-14 rt kernel
>> worked better with about ~ 10 ms latency on my macbook an my usb m-audio
>> fasttrack pro.
>>
>>
>> my jackd:
>> /usr/bin/jackd -R -P89 -p512 -t2000 -dalsa -r44100 -p512 -n3 -D -Chw:4,1
>> -Pmulti
>>
>> best,
>> alex
>>


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Old 05-08-2008, 04:16 PM
atuc
 
Default normal kernel better than rt kernel on hardy?

Fabien Juchniewicz schrieb:
> For my config, I have to stop network manager...
>
>
this i tried also, this does nor help,
thanks,
alex


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Old 05-08-2008, 06:49 PM
Fabien Juchniewicz
 
Default normal kernel better than rt kernel on hardy?

My config is a standard Ubuntu 64 bits with the RT kernel.



Here is my limits.conf



@audio - rtprio 99

@audio - nice -15

@audio - memlock* unlimited



and I launch jackd with "nice -n-15" : /usr/bin/nice -n-15 /usr/bin/jackd -R -p128 -dalsa -dhw:0,0 -r48000 -p128 -n2 -H -M



I hope this helps.



/Fabien





Le jeudi 08 mai 2008 à 18:16 +0200, atuc a écrit :


Fabien Juchniewicz schrieb:
> For my config, I have to stop network manager...
>
>
this i tried also, this does nor help,
thanks,
alex






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