> > Powertop 1.5 tells me:
> > Wakeups-from-idle per second : 1161.0
> > no ACPI power usage estimate available
> > Top causes for wakeups:
> > 49.3% (898.0) <interrupt> : ehci_hcd:usb1, uhci_hcd:usb8, wcfxo
> > 20.1% (366.4) <interrupt> : ide0
> > 7.4% (135.0) bot : schedule_timeout (process_timeout)
> > Now how can I find which device is triggering those "ehci_hcd:usb1,
> > uhci_hcd:usb8, wcfxo" interrupts?
>
> the best would be to paste your /proc/interrupts here. Do you have any
> usb-devices connected which may be frequently used to cause these massive
> cpu-usage.
Yes. What I would like to find out is: which USB device is causing this.
CPU0 CPU1
0: 85 0 IO-APIC-edge timer
1: 8 0 IO-APIC-edge i8042
7: 0 0 IO-APIC-edge parport0
9: 0 0 IO-APIC-fasteoi acpi
12: 105 0 IO-APIC-edge i8042
14: 8633017 2 IO-APIC-edge ide0
15: 26 0 IO-APIC-edge ide1
16: 5848998 0 IO-APIC-fasteoi uhci_hcd:usb5, eth1
17: 194426527 0 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb8,
wcfxo
18: 329737 0 IO-APIC-fasteoi ehci_hcd:usb2, bttv0
19: 3020587 0 IO-APIC-fasteoi uhci_hcd:usb3, uhci_hcd:usb6
20: 34452 0 IO-APIC-fasteoi uhci_hcd:usb4
21: 4150742 0 IO-APIC-fasteoi uhci_hcd:usb7
22: 10761284 0 IO-APIC-fasteoi eth0
23: 10 0 IO-APIC-fasteoi Intel ICH5
NMI: 0 0
LOC: 46404209 45887568
ERR: 0
MIS: 1
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