cat /proc/interrupts gives the following <div>CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 <div> 0: 26 0 0 893152 0 0 0 0 IO-APIC-edge timer</div>
<div> 1: 22 0 0 31 5062 0 0 0 IO-APIC-edge i8042</div><div> 8: 0 0 0 1 0 0 0 0 IO-APIC-edge rtc0</div>
<div> 9: 729 0 0 148 0 0 0 0 IO-APIC-fasteoi acpi</div><div> 12: 74387 0 0 173 0 0 0 0 IO-APIC-edge i8042</div>
<div> 16: 11853419 0 0 0 0 0 93 0 IO-APIC-fasteoi ehci_hcd:usb1, brcmsmac</div><div> 21: 613255 0 0 241 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb2</div>
<div> 40: 1664049 0 0 0 0 0 0 0 HPET_MSI-edge hpet2</div><div> 41: 0 373735 0 0 0 0 0 0 HPET_MSI-edge hpet3</div>
<div> 42: 0 0 244881 0 0 0 0 0 HPET_MSI-edge hpet4</div><div> 43: 0 0 0 270616 0 0 0 0 HPET_MSI-edge hpet5</div>
<div> 44: 0 0 0 0 1035760 0 0 0 HPET_MSI-edge hpet6</div><div> 45: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0</div>
<div> 46: 6781 5882 0 0 424359 0 0 0 PCI-MSI-edge ahci</div><div> 47: 0 0 1 0 0 0 0 0 PCI-MSI-edge xhci_hcd</div>
<div> 48: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd</div><div> 49: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd</div>
<div> 50: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd</div><div> 51: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd</div>
<div> 52: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd</div><div> 53: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd</div>
<div> 54: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd</div><div> 55: 0 0 0 0 618 0 0 181167 PCI-MSI-edge radeon</div>
<div> 56: 0 0 0 0 0 255 940 0 PCI-MSI-edge hda_intel</div><div> 57: 0 0 0 0 0 624 0 0 PCI-MSI-edge hda_intel</div>
<div>NMI: 0 0 0 0 0 0 0 0 Non-maskable interrupts</div><div>LOC: 146 135 118 101 83 292119 262176 323651 Local timer interrupts</div>
<div>SPU: 0 0 0 0 0 0 0 0 Spurious interrupts</div><div>PMI: 0 0 0 0 0 0 0 0 Performance monitoring interrupts</div>
<div>IWI: 0 0 0 0 0 0 0 0 IRQ work interrupts</div><div>RES: 8835 2130 1206 621 13366 2364 1354 679 Rescheduling interrupts</div>
<div>CAL: 848 2123 2403 2402 1147 2676 2523 2331 Function call interrupts</div><div>TLB: 12484 8516 5371 4185 16856 5432 4059 2812 TLB shootdowns</div>
<div>TRM: 0 0 0 0 0 0 0 0 Thermal event interrupts</div><div>THR: 0 0 0 0 0 0 0 0 Threshold APIC interrupts</div>
<div>MCE: 0 0 0 0 0 0 0 0 Machine check exceptions</div><div>MCP: 58 58 58 58 58 58 58 58 Machine check polls</div>
<div>ERR: 0</div><div>MIS: 0</div><div><br></div><div><br></div><div>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.</div>
<div>That's enough to deactivate the hardware from using that interruption, isn't it?</div><div><br></div><div><div>lsusb -t</div><div>/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M</div><div>
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M</div><div>/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/3p, 480M</div><div> |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/8p, 480M</div><div>
|__ Port 2: Dev 7, If 0, Class=hub, Driver=hub/7p, 480M</div><div> |__ Port 4: Dev 8, If 0, Class=HID, Driver=usbhid, 1.5M</div><div> |__ Port 4: Dev 8, If 1, Class=HID, Driver=usbhid, 1.5M</div>
<div> |__ Port 7: Dev 9, If 0, Class=stor., Driver=usb-storage, 480M</div><div> |__ Port 5: Dev 4, If 0, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M</div><div> |__ Port 5: Dev 4, If 1, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M</div>
<div>/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/3p, 480M</div><div> |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M</div><div> |__ Port 1: Dev 4, If 0, Class=vend., Driver=snd-usb-audio, 480M</div>
<div> |__ Port 1: Dev 4, If 1, Class=vend., Driver=snd-usb-audio, 480M</div><div> |__ Port 1: Dev 4, If 2, Class=vend., Driver=snd-usb-audio, 480M</div><div> |__ Port 1: Dev 4, If 3, Class=audio, Driver=snd-usb-audio, 480M</div>
<div> |__ Port 1: Dev 4, If 4, Class=app., Driver=snd-usb-audio, 480M</div></div><div><br></div><div><br></div></div>