How can I turn off the blinking blue led at the Pi M5?
you can change the led trigger in /sys/class/leds/blue for kernel 4.9 image,
for example turn off blue led
echo none > /sys/class/leds/blue/trigger
Awesome, it worked. I had to do the operation as a root user using
sudo su
Still works with 6.6 kernel (Armbian Jammy), but path is now:
/sys/class/leds/blue\:status/trigger