Switching the Magic Mirror display on/off

Hilt

Thanks for the heads up Sam.

I’m currently running Bullseye with kernel 6.1.21-v7+ and it still works in this revision. Admittedly I didn’t try with Bookworm as when I originally tried it ( Bookworm ) at launch, the VNC server had gone away on account of Wayland and alternatives were…interesting back then ( didn’t do too much research at the time to be fair ). So for this rebuild I just stuck with Bullseye.

2 quick questions for my own edification :

For Bookworm. Could the commands I listed for vcgencmd simply be replaced with wlr-randr --output HDMI-A-1 --on and wlr-randr --output HDMI-A-1 --off ( assuming HDMI port 1 ) for the same result ?
Another option according the the almighty but not always correct ChatGPT is to switch to X11 and then vcgencmd would work as expected ?

I have a spare Pi I could test on. I won’t however have time to tinker in the next few weeks. Curse having to adult !!

Really appreciate your input

sdetweil

@Hilt said in Switching the Magic Mirror display on/off:

Another option according the the almighty but not always correct ChatGPT is to switch to X11 and then vcgencmd would work as expected ?

no, this is incorrect, as vcgencmd is no more , altho I see it on my bookworm system , it is not supposed to support display anymore…

as for point 1,
when running wayland you can use the wlr-randr command
when running x11 you can use the xrandr command

I don’t know the specifics of what each command needs.

all linux commands come with help built in

wlr-randr --help

many provide more detailed info in the man page
man wlr-randr
I see the man page for vcgencmd is there too

Klinge

First of all, thank you for your tips.

So, I use the module from ambarusa

origin  https://github.com/ambarusa/MMM-HomeAssistant/ (fetch)
origin  https://github.com/ambarusa/MMM-HomeAssistant/ (push)

And use the following config

                   module: “MMM-HomeAssistant”,
                   config: {
                        mqttServer: “mqtt://192.168.100.xx”,
                        mqttPort: 1883,
                        username: “mqttxxxx”,
                        password: “xxxxx”,
                        deviceName: “MagicMirror xxxx”,
                        autodiscoveryTopic: “homeassistant”,
                        monitorControl: true,
                        brightnessControl: true,
                        moduleControl: true,
                        monitorStatusCommand: “xrandr --query | awk \”/Screen/ {print ($8 > 320) ? ‘true’ : ‘false’}\“”,
                        monitorOnCommand: “wlr-randr --output HDMI-A-1 --on --transform 90”,
                        monitorOffCommand: “wlr-randr --output HDMI-A-1 --off”,
//                      monitorOnCommand: “xrandr -d :0 --output HDMI-1 --auto --rotate right”,
//                      monitorOffCommand: “xrandr -d :0 --output HDMI-1 --off”,
                        pm2ProcessName: “mm”,
                    }

As you can see, I use wlr-randr for on/off and rotate the monitor 90 degrees when switching it on.

Klinge

I think you’re right in calling it a switch. You can see it clearly in the screenshot at the arrow.

Hilt

@sdetweil

Many thanks for the input. I’ll have a tinker when I find a gap and explore the commands and their respective soft switches. Just so that I’m future proof !