"In the ongoing effort to reduce the power consumption of the
linux kernel and take better advantage of the tickless kernel
patch, Stephen Hemminger posted a patch to make it possible to
unload the keyboard blink driver, 'the blink driver wakes up every
jiffy which wastes power unnecessarily. Using a notifier gives same
effect. Also add ability to unload module.' The blink driver was
only recently merged, described as a 'simple driver that blinks the
keyboard LEDs when loaded. Useful for checking that the kernel is
still alive or for crashdumping...'"
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