spurious 8259A interrupt

[marmango]

Εχω παρατηρήσει ότι στο /etc/log/messages μου πετάει όχι πολύ συχνά το 
παρακάτω:
Dec 16 08:21:43 laptop kernel: spurious 8259A interrupt: IRQ7.

Κάποια ιδέα για troubleshooting?
(os: mdk9.2)
  more /proc/interrupts
            CPU0
   0:     296231          XT-PIC  timer
   1:       1791          XT-PIC  keyboard
   2:          0          XT-PIC  cascade
   3:     793413          XT-PIC  serial
   5:      56090          XT-PIC  usb-uhci, Allegro
   8:          1          XT-PIC  rtc
  11:        452          XT-PIC  eth0, Texas Instruments PCI1420, Texas 
Instruments PCI1420 (#2)
  12:          9          XT-PIC  PS/2 Mouse
  14:      36338          XT-PIC  ide0
  15:         63          XT-PIC  ide1
NMI:          0
LOC:          0
ERR:          3
MIS:          0