@KristjanESPERANTO I set up a fresh MagicMirror instance and checked the https://github.com/MarcLandis/MMM-Buttons repository. As a result I get the same issue:

[2025-06-09 22:57:35.709] [ERROR] Whoops! There was an uncaught exception... 
[2025-06-09 22:57:35.718] [ERROR] Error: EINVAL: invalid argument, write
    at Object.writeFileSync (node:fs:2426:20)
    at exportGpio (/home/pi/MagicMirror/modules/MMM-Buttons/node_modules/onoff/onoff.js:18:8)
    at new Gpio (/home/pi/MagicMirror/modules/MMM-Buttons/node_modules/onoff/onoff.js:172:36)
    at Class.intializeButton (/home/pi/MagicMirror/modules/MMM-Buttons/node_helper.js:89:19)
    at Class.intializeButtons (/home/pi/MagicMirror/modules/MMM-Buttons/node_helper.js:105:18)
    at Class.socketNotificationReceived (/home/pi/MagicMirror/modules/MMM-Buttons/node_helper.js:28:18)
    at Socket.<anonymous> (/home/pi/MagicMirror/js/node_helper.js:91:10)
    at Socket.onevent (/home/pi/MagicMirror/node_modules/socket.io/dist/socket.js:462:26)
    at Socket._onpacket (/home/pi/MagicMirror/node_modules/socket.io/dist/socket.js:430:22)
    at /home/pi/MagicMirror/node_modules/socket.io/dist/client.js:214:24
    at process.processTicksAndRejections (node:internal/process/task_queues:85:11) {
  errno: -22,
  code: 'EINVAL',
  syscall: 'write'
}

…Yesterday evening I tried to fix the issue of not beingable to control the MagicMirror using some buttons. Digged into the original module, asked help of ChatGPT, debugged some functions and as a result I have a running version for Bookworm.
I’ll try to put this in a Github Repo - will update this thread as soon as I did :)

@sdetweil You’ve said that I only need to change some settings in the rasp-config. Do you have any additional information what needs to be changed?

@Rags As faw as I know “armhf” is the 32bit equivalent.
Bullseye-Full 32Bit should be her: https://downloads.raspberrypi.org/raspios_full_armhf/images/raspios_full_armhf-2023-05-03/

@Rags Allow me to go a few steps back - maybe we can find a solution for your problem. In my opinion the problem is not caused by any MagicMirror specific issue, but it’s based on your overall setup.

0.) Reflash your image. Since I do not have any experiences with Trixie, I would suggest to use Bookworm. Ensure that you are using the the image with Desktop Envionment - here you can interactively change the resolution and orientation.
1.) Update the system to latest version using the following command:

apt update && apt full-upgrade -y && apt autoremove -y && apt clean

2.) Restart your system
3.) Set the resolution and orientation using the System Preferences
4.) Use @sdetweil script for installing the MagicMirror. The script can be found here: https://github.com/sdetweil/MagicMirror_scripts?tab=readme-ov-file#install-magicmirror
5.) Install your module (MMM-Screen-Powersave-Notification) and configure it for using the wlr-randr_control. wlr is used by default in Bookworm.

@rkorell Which shop did you use for your glases? I’ve ordered mine at glasstar.de, but yes - not cheap!

@KristjanESPERANTO Argh…I didn’t see that :-/ Nevermind…at least I’ve learned something about the Module…

@rkorell Thanks for publishing your great module. I already use it and hell yeah - it’s great :)
I was also able to make the needed modification to my “Buttons”-module using the node-libgpiod package. Main reason why it was not working was the missing postinstall script.

Thanks and “schöne Grüße” :)