log of interrupt arrange (normal) :

BOOT_IMAGE=/boot/vmlinuz-2.6.31-16-generic root=UUID=27632531-dd03-4a63-91c3-8b6f1fdf9a82 ro quiet splash
CPU0 CPU1
0: 51 0 IO-APIC-edge timer
1: 2 0 IO-APIC-edge i8042
7: 1 0 IO-APIC-edge
8: 1 0 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 4 0 IO-APIC-edge i8042
19: 405 0 IO-APIC-fasteoi ath
20: 1151 0 IO-APIC-fasteoi ohci_hcd:usb2
21: 4381 0 IO-APIC-fasteoi ehci_hcd:usb1
22: 701 0 IO-APIC-fasteoi HDA Intel
23: 541 0 IO-APIC-fasteoi eth0
29: 8871 0 PCI-MSI-edge ahci
NMI: 0 0 Non-maskable interrupts
LOC: 31080 24673 Local timer interrupts
SPU: 0 0 Spurious interrupts
CNT: 0 0 Performance counter interrupts
PND: 0 0 Performance pending work
RES: 98 130 Rescheduling interrupts
CAL: 43 64 Function call interrupts
TLB: 281 622 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 3 3 Machine check polls
ERR: 1
MIS: 0