On Fri, Oct 1, 2010 at 1:30 PM, Dave Phillips <dlphillips@xxxxxxxxxx> wrote:
> rosea grammostola wrote:
>>
>> My thinkpad t61 makes a high frequency sound, pipipipipippi, not very
>> loud. Funny thing, when I stick in the usb mouse, it's gone... I only
>> have this issue when on battery. Suggestions for solution?
>>
>>
>
>
> Could be an IRQ conflict. What does 'cat /proc/interrupts' report ?
>
> What does lsusb report ?
>
> Best,
>
> dp
>
>
>
>
When disabling usb 1, the noise is almost totally gone... That looks better.
# cat /proc/interrupts
CPU0 CPU1
0: 130819 131607 IO-APIC-edge timer
1: 998 1032 IO-APIC-edge i8042
8: 0 1 IO-APIC-edge rtc0
9: 1198 1232 IO-APIC-fasteoi acpi
12: 53032 52926 IO-APIC-edge i8042
14: 5238 4891 IO-APIC-edge ata_piix
15: 64 60 IO-APIC-edge ata_piix
17: 100 112 IO-APIC-fasteoi firewire_ohci, HDA Intel
19: 0 2 IO-APIC-fasteoi ehci_hcd:usb2
20: 79 84 IO-APIC-fasteoi
22: 2915 2545 IO-APIC-fasteoi ehci_hcd:usb1
29: 590 599 PCI-MSI-edge eth0
30: 8114 7995 PCI-MSI-edge i915
31: 20779 20776 PCI-MSI-edge iwlagn
NMI: 0 0 Non-maskable interrupts
LOC: 106919 55400 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 0 0 Performance monitoring interrupts
PND: 0 0 Performance pending work
RES: 2262 1781 Rescheduling interrupts
CAL: 14 58 Function call interrupts
TLB: 719 860 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 9 9 Machine check polls
ERR: 1
MIS: 0
# lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
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