Re: [LAU] Cracking sound via USB (ALSA urb.c:480: frame 5 active: -18)

From: Aurélien Leblond <blablack@email-addr-hidden>
Date: Wed May 25 2011 - 02:29:32 EEST

cat /proc/interrupts gives the following
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6
CPU7
  0: 26 0 0 893152 0 0
   0 0 IO-APIC-edge timer
  1: 22 0 0 31 5062 0
   0 0 IO-APIC-edge i8042
  8: 0 0 0 1 0 0
   0 0 IO-APIC-edge rtc0
  9: 729 0 0 148 0 0
   0 0 IO-APIC-fasteoi acpi
 12: 74387 0 0 173 0 0
   0 0 IO-APIC-edge i8042
 16: 11853419 0 0 0 0 0
  93 0 IO-APIC-fasteoi ehci_hcd:usb1, brcmsmac
 21: 613255 0 0 241 0 0
   0 0 IO-APIC-fasteoi ehci_hcd:usb2
 40: 1664049 0 0 0 0 0
   0 0 HPET_MSI-edge hpet2
 41: 0 373735 0 0 0 0
   0 0 HPET_MSI-edge hpet3
 42: 0 0 244881 0 0 0
   0 0 HPET_MSI-edge hpet4
 43: 0 0 0 270616 0 0
   0 0 HPET_MSI-edge hpet5
 44: 0 0 0 0 1035760 0
   0 0 HPET_MSI-edge hpet6
 45: 0 0 0 0 0 0
   0 0 PCI-MSI-edge eth0
 46: 6781 5882 0 0 424359 0
   0 0 PCI-MSI-edge ahci
 47: 0 0 1 0 0 0
   0 0 PCI-MSI-edge xhci_hcd
 48: 0 0 0 0 0 0
   0 0 PCI-MSI-edge xhci_hcd
 49: 0 0 0 0 0 0
   0 0 PCI-MSI-edge xhci_hcd
 50: 0 0 0 0 0 0
   0 0 PCI-MSI-edge xhci_hcd
 51: 0 0 0 0 0 0
   0 0 PCI-MSI-edge xhci_hcd
 52: 0 0 0 0 0 0
   0 0 PCI-MSI-edge xhci_hcd
 53: 0 0 0 0 0 0
   0 0 PCI-MSI-edge xhci_hcd
 54: 0 0 0 0 0 0
   0 0 PCI-MSI-edge xhci_hcd
 55: 0 0 0 0 618 0
   0 181167 PCI-MSI-edge radeon
 56: 0 0 0 0 0 255
 940 0 PCI-MSI-edge hda_intel
 57: 0 0 0 0 0 624
   0 0 PCI-MSI-edge hda_intel
NMI: 0 0 0 0 0 0
   0 0 Non-maskable interrupts
LOC: 146 135 118 101 83 292119
262176 323651 Local timer interrupts
SPU: 0 0 0 0 0 0
   0 0 Spurious interrupts
PMI: 0 0 0 0 0 0
   0 0 Performance monitoring interrupts
IWI: 0 0 0 0 0 0
   0 0 IRQ work interrupts
RES: 8835 2130 1206 621 13366 2364
1354 679 Rescheduling interrupts
CAL: 848 2123 2403 2402 1147 2676
2523 2331 Function call interrupts
TLB: 12484 8516 5371 4185 16856 5432
4059 2812 TLB shootdowns
TRM: 0 0 0 0 0 0
   0 0 Thermal event interrupts
THR: 0 0 0 0 0 0
   0 0 Threshold APIC interrupts
MCE: 0 0 0 0 0 0
   0 0 Machine check exceptions
MCP: 58 58 58 58 58 58
  58 58 Machine check polls
ERR: 0
MIS: 0

The sound cart is on the ehci usb1. I have noticed that my wifi card is
using the same IRQ, but on my kernel especially compiled for music, the
brcmsmac module is disabled.
That's enough to deactivate the hardware from using that interruption, isn't
it?

lsusb -t
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/3p, 480M
    |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/8p, 480M
        |__ Port 2: Dev 7, If 0, Class=hub, Driver=hub/7p, 480M
            |__ Port 4: Dev 8, If 0, Class=HID, Driver=usbhid, 1.5M
            |__ Port 4: Dev 8, If 1, Class=HID, Driver=usbhid, 1.5M
            |__ Port 7: Dev 9, If 0, Class=stor., Driver=usb-storage, 480M
        |__ Port 5: Dev 4, If 0, Class='bInterfaceClass 0x0e not yet
handled', Driver=uvcvideo, 480M
        |__ Port 5: Dev 4, If 1, Class='bInterfaceClass 0x0e not yet
handled', Driver=uvcvideo, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/3p, 480M
    |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M
        |__ Port 1: Dev 4, If 0, Class=vend., Driver=snd-usb-audio, 480M
        |__ Port 1: Dev 4, If 1, Class=vend., Driver=snd-usb-audio, 480M
        |__ Port 1: Dev 4, If 2, Class=vend., Driver=snd-usb-audio, 480M
        |__ Port 1: Dev 4, If 3, Class=audio, Driver=snd-usb-audio, 480M
        |__ Port 1: Dev 4, If 4, Class=app., Driver=snd-usb-audio, 480M

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Received on Wed May 25 04:15:03 2011

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