Hello, The i8042_interrupt is the keyboard interrupt handler : see , in drivers/input/serio, the method: static irqreturn_t i8042_interrupt(int irq, void *dev_id, struct pt_regs *regs) This interrupt handler is registered on interrupt 1, the keyboard interrupt. I had added "printk(KERN_INFO "inside i8042_interrupt\n") in this handler, and built the kernel and booted the new kernel. After boot , I see many many many such "inside i8042_interrupt" messages and then it get probably stucked and reboot itself. Why is it so ? what causes keyboard interrupts when booting ? I am not pressing the keyboard at all... Any idea ? Regards, John -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/