nostr:npub1xvgflyhk97zcx8nwkw9zeuzj8z88wj2f4lcvljsxe6f80w7dhsqs7hfy5f what does 'ls -l /sys/class/leds/max_brightness'' give? I think of 'sudo echo "0" > /sys/class/leds/max_brightness' but IDK.