Difference between revisions of "Quartz64"
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(→How-To: add info on how to disable the heartbeat LED) |
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$ picocom -b 1500000 /dev/ttyUSB0 | $ picocom -b 1500000 /dev/ttyUSB0 | ||
=== Disable Heartbeat LED (Linux) === | |||
The flashing LED is called the "heartbeat LED", it blinks in a heart rhythm like fashion once the kernel is running. To disable it, you can run | |||
# echo none > /sys/class/leds/user-led/trigger | |||
On a system with systemd, you can do this as soon as the system is ready to be logged in with a systemd unit like this: | |||
[Unit] | |||
Description=Turn off heartbeat LED | |||
Wants=multi-user.target | |||
After=multi-user.target | |||
[Install] | |||
WantedBy=multi-user.target | |||
[Service] | |||
Type=simple | |||
ExecStart=sh -c 'echo none > /sys/class/leds/user-led/trigger' | |||
Place it in <tt>/etc/systemd/system/user-led.service</tt>, and run | |||
# systemctl daemon-reload | |||
# systemctl enable user-led.service | |||
Upon rebooting, you will now notice that the heartbeat LED will blink during boot-up, but stops blinking as soon as the multi-user target is reached (i.e. the user can log in). | |||
[[Category:Quartz64]] | [[Category:Quartz64]] | ||