Can you turn off the pi 4 pwr and Ethernet lights?

[Pilaced]

You can’t on the pi 3 right?

[jahboater]

I turn the power led off by adding this to /etc/crontab

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@reboot root echo 0 > /sys/class/leds/led1/brightness

works on the Pi3 and the Pi4.
There must be a better way .....

[trejan]

No known way of turning off the Pi 4 Ethernet socket LEDs. The LEDs are wired to the Broadcom Ethernet PHY and there is no public documentation on it AFAIK. The config.txt options to turn off the LED is only for the 3B+ and the utility is for the older Pi boards.

[stuart72]

have you seen https://www.raspberrypi.org/forums/view ... p?t=252057 which contains a link to https://github.com/raspberrypi/linux/co ... a8575ee06b which appears to be the code that we need to change to disable the Ethernet LED on a Pi4?

[kokosmolch]

adding these lines to the /boot/config.txt works like a charm for me on a RPi 4 (PI OS 2020-08-20)

#disable ACT and PWR LEDs
dtparam=act_led_trigger=none
dtparam=pwr_led_trigger=none

#disable ethernet port LEDs
dtparam=eth0_led=4
dtparam=eth1_led=4

Cheers

[djace]

this is not working for me on RPi4

[jahboater]

This works for me:

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[pi4]
# Disable the PWR LED
dtparam=pwr_led_trigger=none
dtparam=pwr_led_activelow=off
# Disable the Activity LED
dtparam=act_led_trigger=none
dtparam=act_led_activelow=off
# Disable ethernet port LEDs
dtparam=eth_led0=4
dtparam=eth_led1=4

[ejolson]

This works for me:

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[pi4]
# Disable the PWR LED
dtparam=pwr_led_trigger=none
dtparam=pwr_led_activelow=off
# Disable the Activity LED
dtparam=act_led_trigger=none
dtparam=act_led_activelow=off
# Disable ethernet port LEDs
dtparam=eth_led0=4
dtparam=eth_led1=4

Once you do this is there anyway to turn the lights on and off programmatically through the /sys interface?

[jahboater]

Once you do this is there anyway to turn the lights on and off programmatically through the /sys interface?

Sorry, never tried to, hopefully someone else knows.

[Libin]

this is not working for me on RPi4

Note that you must add these lines under the tag [pi4]. If you just add these in the end of the file (my config shows the last tag is [all]), it won't work. My rasp version is 4B.

[basmeyer]

Thanks jahboater,

That worked out great!
After adding this to /boot/config.txt and rebooting the Pi it takes a little while before they go out but in a while all nice and dark (with only the green LED of the soundboard but that is OK). No more upknockcious lights, especially the ethernet ones.

[lamba92]

Any solution for Ubuntu Server as OS? I own a Pi4 and a Pi2 and for both none of the above solutions works. Btw Ubuntu 20.04.

[timg236]

Once you do this is there anyway to turn the lights on and off programmatically through the /sys interface?

Sorry, never tried to, hopefully someone else knows.

Not a /sys interface but mdiotool https://github.com/PieVo/mdio-tool can be used to poke the MDIO interface directly. The following commands will turn off the LEDs, if you look at the DTBs + Ethernet MAC driver then the other values for link speed / always on are should be the there

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# Select expansion register 4
mdiotool w eth0 0x17 0xf04 
# Forced off LED2 7:3 0x4 LED1 3:0 0x4
mdiotool w eth0 0x15 0x044

[ejolson]

Once you do this is there anyway to turn the lights on and off programmatically through the /sys interface?

Sorry, never tried to, hopefully someone else knows.

Not a /sys interface but mdiotool https://github.com/PieVo/mdio-tool can be used to poke the MDIO interface directly. The following commands will turn off the LEDs, if you look at the DTBs + Ethernet MAC driver then the other values for link speed / always on are should be the there

Code: Select all

# Select expansion register 4
mdiotool w eth0 0x17 0xf04 
# Forced off LED2 7:3 0x4 LED1 3:0 0x4
mdiotool w eth0 0x15 0x044

That looks like it could be interesting to show certain kinds of status conditions. Thanks for the follow up.

[trejan]

That looks like it could be interesting to show certain kinds of status conditions.

Blink the IP address at startup?