<div dir="ltr"><div><div><div><div><div>Thanks Ralf for the suggestions.<br><br></div>Tomorrow i will experiment a little bit.<br></div>One strange thing that i don't understand is why does still compare the webcam (on the bus 2) in lsusb even if i blacklisted the uvcvideo e videodev drivers?<br>
<br></div>I also found a very interesting discussion about rtirq made on LAU<br><a href="http://linux-audio.4202.n7.nabble.com/Re-Issue-with-the-priority-of-the-sound-cards-using-rtirq-td40952i20.html">http://linux-audio.4202.n7.nabble.com/Re-Issue-with-the-priority-of-the-sound-cards-using-rtirq-td40952i20.html</a><br>
<br></div>Cheers<br></div>Nicola<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/7/29 Ralf Mardorf <span dir="ltr"><<a href="mailto:ralf.mardorf@alice-dsl.net" target="_blank">ralf.mardorf@alice-dsl.net</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">ninu@ninu-HPg6:~$ service rtirq status<br>
<br>
PID CLS RTPRIO NI PRI %CPU STAT COMMAND<br>
66 FF 90 - 130 0.0 S irq/8-rtc0<br>
62 FF 80 - 120 0.3 S irq/16-ehci_hcd<br>
63 FF 79 - 119 0.8 S irq/21-ehci_hcd<br>
65 FF 75 - 115 0.0 S irq/1-i8042<br>
64 FF 74 - 114 0.0 S irq/12-i8042<br>
35 FF 50 - 90 0.0 S irq/9-acpi<br>
189 FF 50 - 90 0.0 S irq/41-rtsx_pci<br>
217 FF 50 - 90 0.3 S irq/42-ahci<br>
424 FF 50 - 90 0.0 S irq/43-mei<br>
620 FF 50 - 90 0.4 S irq/16-ath9k<br>
742 FF 50 - 90 0.0 S irq/44-i915<br>
1377 FF 50 - 90 0.0 S irq/40-eth0<br>
3 TS - 0 19 0.2 S ksoftirqd/0<br>
14 TS - 0 19 0.1 S ksoftirqd/1<br>
19 TS - 0 19 0.0 S ksoftirqd/2<br>
24 TS - 0 19 0.0 S ksoftirqd/3<br>
<br>
Unbind ehci_hcd with irq 16 and use ehci_hcd with irq 21 for the USB<br>
sound device. Disabling WLAN might be useful too, even when it doesn't<br>
share the irq.<br>
<br>
<a href="http://wiki.linuxaudio.org/wiki/system_configuration#solve_irq_conflict_by_unbinding_devices" target="_blank">http://wiki.linuxaudio.org/wiki/system_configuration#solve_irq_conflict_by_unbinding_devices</a><br>
<br>
Or at least take care that the used USB slot is head of the USB slots,<br>
<br>
RTIRQ_NAME_LIST="rtc snd usb i8042"<br>
<br>
instead of "usb" add the number "usb1" or similar, ask Rui, if it<br>
shouldn't be described by<br>
<br>
<a href="http://wiki.linuxaudio.org/wiki/system_configuration#rtirq" target="_blank">http://wiki.linuxaudio.org/wiki/system_configuration#rtirq</a><br>
<br>
Rui Nuno Capela<br>
rncbc at rncbc dot org<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
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</div></div></blockquote></div><br></div>