Comment 4 for bug 697383

This is still a problem in Natty. The only way I can get a microphone working is to use a USB microphone.

Here is the output of cat /proc/interrupts:

           CPU0
  0: 63871825 IO-APIC-edge timer
  1: 518132 IO-APIC-edge i8042
  7: 1 IO-APIC-edge
  8: 1 IO-APIC-edge rtc0
  9: 67071 IO-APIC-fasteoi acpi
 12: 34758412 IO-APIC-edge i8042
 14: 0 IO-APIC-edge pata_atiixp
 15: 0 IO-APIC-edge pata_atiixp
 16: 832205085 IO-APIC-fasteoi ohci_hcd:usb3, ohci_hcd:usb4, ath9k, hda_intel
 17: 5980086 IO-APIC-fasteoi ehci_hcd:usb1
 18: 15899014 IO-APIC-fasteoi ohci_hcd:usb5, ohci_hcd:usb6, radeon
 19: 1446 IO-APIC-fasteoi ehci_hcd:usb2, hda_intel
 22: 4779363 IO-APIC-fasteoi ahci
 42: 1 PCI-MSI-edge eth0
NMI: 0 Non-maskable interrupts
LOC: 61586845 Local timer interrupts
SPU: 0 Spurious interrupts
PMI: 0 Performance monitoring interrupts
IWI: 0 IRQ work interrupts
RES: 0 Rescheduling interrupts
CAL: 0 Function call interrupts
TLB: 0 TLB shootdowns
TRM: 0 Thermal event interrupts
THR: 0 Threshold APIC interrupts
MCE: 0 Machine check exceptions
MCP: 846 Machine check polls
ERR: 1
MIS: 0