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   David Leeuwestein (dd@digitalcourage.social)'s status on Friday, 03-Nov-2023 20:13:22 JST David Leeuwestein

   in reply to

   • Lennart Poettering

   @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“

   • Embed this notice
     Lennart Poettering (pid_eins@mastodon.social)'s status on Friday, 03-Nov-2023 20:13:23 JST Lennart Poettering

     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?

     GreenSkyOverMe (Monika) repeated this.