Re: [LAU] Issues with JACK

On 03/03/2013 03:29 PM, Gabbe Nord wrote:
> Hello Jeremy, and thank you so much for your reply!
>
> I disabled SpeedStep in BIOS, and it helped a little, thanks!

So the xruns are not completely gone? And what if you force the Lexicon
to only use 2 ins and outs with -i2 -o2? Could you also post your jackd
command (run JACK and check with ps -eo cmd | grep [j]ackd)

  Here's my
> interrupts:
>
> zth@email-addr-hidden:~$ cat /proc/interrupts
> CPU0 CPU1 CPU2 CPU3
> 0: 43 0 1 1 IO-APIC-edge timer
> 1: 3 0 0 0 IO-APIC-edge i8042
> 8: 1 0 0 0 IO-APIC-edge rtc0
> 9: 0 0 0 0 IO-APIC-fasteoi acpi
> 12: 4 0 0 0 IO-APIC-edge i8042
> 23: 412535 22606 20 25 IO-APIC-fasteoi
> ehci_hcd:usb1, ehci_hcd:usb2
> 41: 12871 435 437 292 PCI-MSI-edge ahci
> 42: 0 0 0 0 PCI-MSI-edge
> xhci_hcd
> 43: 67 9 3 8 PCI-MSI-edge eth0
> 44: 9 3 1 0 PCI-MSI-edge mei
> 45: 78 161 80 19 PCI-MSI-edge
> snd_hda_intel
> 46: 87524 15 46 18 PCI-MSI-edge radeon
> 47: 29 0 0 0 PCI-MSI-edge
> snd_hda_intel
> NMI: 171 188 137 145 Non-maskable interrupts
> LOC: 393823 587985 553269 586297 Local timer interrupts
> SPU: 0 0 0 0 Spurious interrupts
> PMI: 171 188 137 145 Performance monitoring
> interrupts
> IWI: 0 0 0 0 IRQ work interrupts
> RES: 33948 43230 37004 44438 Rescheduling interrupts
> CAL: 4737 2603 2357 2402 Function call interrupts
> TLB: 8090 6659 7185 7658 TLB shootdowns
> TRM: 0 0 0 0 Thermal event interrupts
> THR: 0 0 0 0 Threshold APIC interrupts
> MCE: 0 0 0 0 Machine check exceptions
> MCP: 116 116 116 118 Machine check polls
> ERR: 0
> MIS: 0
>
>
>
> I tried alsa-reload but it didn't help =(.
>

Try
sudo modprobe -r snd-usb-audio && sudo modprobe snd-usb-audio

Does that revive MIDI again?

Jeremy

> Thanks again for your reply!
>
>
>
>
> On Sun, Mar 3, 2013 at 1:04 PM, Jeremy Jongepier <jeremy@email-addr-hiddenwrote:
>
>> 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<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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>>>
>>>
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>>
>

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Received on Sun Mar 3 16:15:02 2013