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Did you know you could control brightness of the red dot on the i of the "ThinkPad" on the top-side of your thinkpad? I sure didn't:
this turns it off:
echo 0 | sudo tee /sys/class/leds/tpacpi\:\:lid_logo_dot/brightness
and this turns it on:
echo 255 | sudo tee /sys/class/leds/tpacpi\:\:lid_logo_dot/brightness
I don't really know what this information is good for, but hey, isn't it awesome to have a 1px display on the outside of your laptop?
@pid_eins in a few weeks we will see the first paper with the title: „using lenovos thinkpad led as a covert channel to extract information from airgapped systems“
@dd they forgot to lightgap it