Nouveau Gets A LED Driver To Control Light-Up GeForce Logos
Martin Peres of Intel OTC who continues hacking on Nouveau in his spare time received a donation of a GeForce GTX TITAN graphics card. He decided to play around with the "useless" feature of being able to manipulate the brightness of the LEDs powering this light-up display.
He's written a basic LED driver that hooks up to the LED subsystem and in turn allowing to sync the blinking to the CPU/disk/network activity or other manual controls.
Martin noted with the fun patch where he implemented this LED control support in less than 200 lines of code, "Users may also implement some breathing effect or morse code support in the userspace if they feel like it."
This configurable LED support for the GeForce logo has long been exposed under Windows on supported hardware.