MM current version on Raspberry Pi 5 cannot turn off monitor

karsten13

and interesting idea being described for integrating older devices, like washing machine, is to monitor the power consumption with a smart plug… (I don’t know which do that in the US)

thats exactly what I plan for my washing machine

I wonder if the pi also has a lower consumption that can be measured and used as a trigger to turn off the smart switch when the power drops after pi shuts down…

I ordered a smart plug from TuYa for this and tested this now with a raspberry pi 4.

When the pi is running:

After shutdown of the pi but red light of pi still on:

sdetweil

@karsten13 awesome. I hope my plug will be here today

jbat66

@sdetweil So I ened up using a Yo-Link Plug, and it’s API. I have my monitor plugged into the Yo-Link Plug. I wrote a script that sets a delay time off to 1 minute for the monitor, and then 10 seconds later does a sudo power off command. So the pi shuts down gracefuly and then the monitor. The pi is powered from the usb connector on the monitor.

JohnGalt

@jbat66 - thanks for the offer. If you do wind up sharing your work, I will take a look and see if it works for me.

I don’t run any remote control module, and don’t find the “MMM-remote” you reference when I search. I do, however, find at least two (2) different modules called “MMM-Remote-Control” by two different authors. Do you mean one of those?

My progress so far is that I can get the monitor to turn off using the following script (called by a cron job), but the monitor then turns back on after ~10-15 seconds:

#!/bin/bash

# Script to turn off monitor display when called by crontab
export WAYLAND_DISPLAY=wayland-1
export XDG_RUNTIME_DIR=/run/user/1000
/usr/bin/wlr-randr --output HDMI-A-1 --off

1a2a3a

@JohnGalt Can you add vc4.force_hotplug=1 to cmdline.txt (on existing line) and check if behaviour changes? Add a space at the end of the line, save and reboot.

Assuming you are using the first hdmi port closer to the usb c. If using the 2nd port then change the hot plug number to 2

jbat66

@JohnGalt said in MM current version on Raspberry Pi 5 cannot turn off monitor:

@jbat66 - thanks for the offer. If you do wind up sharing your work, I will take a look and see if it works for me.

I don’t run any remote control module, and don’t find the “MMM-remote” you reference when I search. I do, however, find at least two (2) different modules called “MMM-Remote-Control” by two different authors. Do you mean one of those?

This one: https://github.com/Jopyth/MMM-Remote-Control

Sorry I should have been more clear.

JohnGalt

@1a2a3a said in MM current version on Raspberry Pi 5 cannot turn off monitor:

vc4.force_hotplug

That does appear to work! So far I have tried it on two different Pi 4 instances, and each responded to a script called in crontab to turn off the monitor display, and then a script to turn it back on, as expected.

Thanks.

jbat66

@1a2a3a Thank you Thank you Thank you… That worked for me as well… Message me, and I will get you a pizza like I promised to anyone who could get my pi4 running latest rasbian to turn off the monitor. Adding vc4.force_hotplug=1 to the end of the line in /boot/cmdline.txt did the trick along with using wlr-randr!!

I’m serious about the pizza.

1a2a3a

@jbat66 all good mate. I’m likely in a different geographic region to you. But anyway it was an issue that someone in GitHub that resolved for me so I can’t really take credit. I would point you to the GitHub but it was quite awhile back hence I can’t find the link anymore, therefore I went into my txt file and gave you guys the code.

devonian69

@jbat66 I know this thread isn’t about getting MMM-Remote-Control to update with this but I was curious if you know how I could go about that.