On 03/03/2013 11:47 AM, Gabbe Nord wrote:
Hello!
I'm experiencing some weird issues with JACK. I got a new system the other
day, and I'm tweaking it for linux audio only basically. My issues are:
even when dsp load isn't even close to 100%, I get xruns. This only happens
at lower latencies, but still. My setup is as follows :
Kxstudio 12.04.2
3.2 realtime kernel (tried lowlatency and generic aswell)
Usb sound card Lexicon Omega
Realtimeconfig quickscan shows everything green except cpu governors, but
I'm pretty sure I don't have that on this system? It's an Intel i5 3570k
desktop. Or maybe there's some setting in BIOS equivalent of cpu governors?
If so that might very well be the problem.
Hello Gabbe,
You can check what governor is in use with:
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
And set it to a non-scaling governor with:
echo -n performance | sudo tee
/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
You can also disable it in your BIOS, it's probably called something
like SpeedStep. More info:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration#cpu_frequency_scaling
I use JACK at 48khz 3 periods/buffer. I start it via falktx's Cadence.
Any ideas about this?
Please post the output of:
cat /proc/interrupts
Also! When I'm asking for help anyway... I connect my MIDI keyboard via
MIDI in on my sound card, but that suddenly stopped working. The midi out
from the sound card is present in JACK, but it delivers no midi. Any idea
on where to start troubleshooting this?
Did you try other USB ports? Or issueing a:
sudo alsa force-reload
Does that help?
Regards,
Jeremy
Thank you so much for taking the time to read this. Cheers!
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