I took the plunge. My five year old MagicMirror ground to a halt as far as Display resolution, Rotation and DIsplay control are concerned. Everything was working great on my Raspberry Pi 3B+. An unfortunate rpi-update broke everything. I struggled to restore Bullseye, and it was a shock to realise it is not easy to find the right official image.
I then tried Bookworm, the three issues continued to remain unsolved.
I then decided to install Trixie. Most of the transition of MM was smooth, ofcourse with a few hicks, but getting the display resolution and rotation was the most frustrating part.
I got it working finally. I have restored the Display resolution and the rotation succesfully.
I will shortly upload the entire process which was not only exhausting but of great learning value.
I need to recover the GPIO Notification Module which isnt working and resulting Motion control of monitor using RCWL0516.

@sdetweil Thank you for the info. However, I finally successfully migrated to Trixie with desired Monitor Resolution and Rotation. And i am using Raspberry Pi 3B+ with an Acer 27 Inch monitor.
With Trixie being launched only three weeks back, there is almost no solutions avaiable. I will shortly share my process of how it was achieved.
Thanks

Awesome. It really works. I had the same issue and it was really frustrating, until i stumbled upon this solution. Great my PIR-sensor module was revived. I just followed the steps mentioned and voila…it has come back to life. Thanks a ton, it is selfless gentlemen like yourself who keep this world going. Kudos.

@sdetweil
Bingo. All systems go…
Thanks once again.
I am doing the backup restore thing now.

@MMRIZE I am stumped. The changes to the color happened, but the resizing still not responding.

@sdetweil
Obviously i am doing something wrong.
I am unable to get to the style even when newsfeed element is highlighted. Or, the style is picking up from main.css and changing anything here will impact all styles.

@MMRIZE Finally ! Finally…
I disabled all modules, except newsfeed, then cleared out the custom.css configs and added a fresh config for newsfeed as suggested above and finally it worked.
So was the issue just because of the corrupt custom.css?
Anyways, this issue has enabled me to learn working with the developer console. I am glad.
Thank you @MMRIZE and thank you @sdetweil . Ever obliged.

@sdetweil I agree. Just to make a point I used AI to rewrite .css code for some of the modules to enhance the UI display on the screen. I achieved the Glass Morphism display characteristics, which is the latest in IOS

@sdetweil Amazing. My current setup has MagicMirror and Homeassistant running on the home network. The integrations between the two is like a Portal has opened up between the future and the past. It is almost like the AI (Alien) visits the past and resolves issues, I guess it is time for the community to harness the power of AI (Cautiously of course) and make MagicMirror a truly user friendly project which can benefit the people who have no tech/ coding background , and would need something that repairs itself when broke.

AI Coding Tools Infuse a New Life in MagicMirror

But before that; a word of caution, PLEASE, Please know what you are doing, take backups.

Over the past few months, I decided to revisit my MagicMirror setup, and the transformation has been substantial. What was once a stable but slowly evolving dashboard has now become a far more dynamic, optimized, and feature-rich system, largely due to the practical use of modern AI coding tools. Previously, extending or modifying MagicMirror modules required significant time for debugging, documentation review, and iterative testing. While that process was valuable, it often slowed experimentation. With AI-assisted development, I was able to accelerate module customization, refactor legacy configurations, improve styling consistency, and resolve dependency conflicts far more efficiently. Some of the key improvements included:

• Refactoring older custom modules for cleaner, maintainable code
• Optimizing API integrations for faster data refresh cycles
• Improving CSS layout responsiveness and visual structure
• Enhancing module intercommunication logic
• Automating repetitive configuration adjustments
• Generating code for new Modules, customised to my requirements and setup
• Tight integration with Homeassistant
  AI tools proved especially effective when troubleshooting obscure npm issues, adjusting Node.js compatibility problems, and restructuring asynchronous logic. Instead of spending hours isolating minor errors, I could focus on architectural improvements and feature expansion.
  The result is a significantly more responsive, visually refined, and modular MagicMirror installation—essentially a complete recharge of the system without starting from scratch.
  AI coding tools are not a replacement for understanding the underlying architecture, but they are undeniably powerful accelerators. For anyone maintaining or expanding a MagicMirror instance, integrating AI into the workflow can dramatically reduce friction and unlock creative possibilities.
  It has effectively given my MagicMirror a second life. I am currently using, Claude Desktop with Sonnet 4.6, Openclaw, AgentZero . All these provide direct integration with MagicMirror and modify code and configurations directly.
  FInally remember PLEASE be careful and know what you are doing.

@sdetweil Thank you for the info. However, I finally successfully migrated to Trixie with desired Monitor Resolution and Rotation. And i am using Raspberry Pi 3B+ with an Acer 27 Inch monitor.
With Trixie being launched only three weeks back, there is almost no solutions avaiable. I will shortly share my process of how it was achieved.
Thanks

I took the plunge. My five year old MagicMirror ground to a halt as far as Display resolution, Rotation and DIsplay control are concerned. Everything was working great on my Raspberry Pi 3B+. An unfortunate rpi-update broke everything. I struggled to restore Bullseye, and it was a shock to realise it is not easy to find the right official image.
I then tried Bookworm, the three issues continued to remain unsolved.
I then decided to install Trixie. Most of the transition of MM was smooth, ofcourse with a few hicks, but getting the display resolution and rotation was the most frustrating part.
I got it working finally. I have restored the Display resolution and the rotation succesfully.
I will shortly upload the entire process which was not only exhausting but of great learning value.
I need to recover the GPIO Notification Module which isnt working and resulting Motion control of monitor using RCWL0516.

@schlomm Thnaks, but i wanted the Bulleseye, OS 32 Bit (for Pi 3B+) full desktop version.

To resolve major issues with Display and rotation and also screen On Off control I am forced to flash the older Bullseye version. I searched high and low, but the " Official Bullseye OS 32 Bit for Raspberry Pi 3B" is almost impossible to find. It has been removed from the Raspberry Pi website, even the archives do not seem to have the correct file. Some shady mirror site do list it but i am aprehensive. I dont know what i am missing. Any help in locating the verified OS from a reliable source.
Thanks

@schlomm ## I just thoght of uploading the Summary of Attempts - All Failed. It is really getting frustrating. My Monitor was working perfectly well the desired rotation and resolution 1080x1960, and now is stuck at 1024x768.

1. config.txt modifications:**

• Custom hdmi_timings for 1920x1080
• Various hdmi_mode settings (82, 87)
• hdmi_ignore_edid=0xa5000080
• Different boost levels and drive settings
• Result: Monitor only shows up to 1024x768 max

2. cmdline.txt kernel parameters:**

• video=HDMI-A-1:1920x1080@60D
• Various video= parameter combinations
• Result: No effect on available resolutions

3. Custom EDID firmware:**

• Created multiple EDID files (256 bytes, 268 bytes, 285 bytes)
• Placed in /lib/firmware/edid/ and /boot/firmware/edid/
• Used drm.edid_firmware=HDMI-A-1:edid/1920x1080.bin
• Rebuilt initramfs to include EDID early
• Result: Kernel loads file but rejects it as “Invalid firmware EDID”

4. Wayland/X11 rotation scripts:**

• wlr-randr (Wayland) - can’t set non-existent 1920x1080 mode
• xrandr (X11) - output name issues
• Result: Can only work with available modes (max 1024x768)

Core Problem:

• Acer HA270 monitor provides NO EDID data** to the Pi
• Bookworm OS + Labwc Wayland compositor won’t accept forced resolutions
• Same monitor worked with Pi 3B + Bullseye (older firmware stack)
• Raspberry Pi detects only: 1024x768, 800x600, 848x480, 640x480

Current Status:

Stuck at 1024x768 rotated = 768x1024 instead of desired 1080x1920. Wonder if we the Rpi OS team is aware f this issue.

@sdetweil Thanks for tryin for a solution. The mirror was oriented in portrait mode, and now the display is landscape and that too low resolution. All my modules displays are messed up and it is a very sorry sight. I had to switch off the mirror… In the last 5 years this is the first time i have had to go through such a major issue.
Is there a way to set the resolution in the config.js ? But i guess the OS and hardware will prevent any software configuration settings.
Can you suggest any other resolution?
Thanks

@rkorell I have tried all changes and variations with config.txt and cmdline.txt, none are working. I am now stuck at a lower resolution screen and no rotation. Any solutions?