Failed to Connect to Wayland Display

sdetweil

@Scruffy
Can you open a terminal window and run this command string

ps -ef | grep -v grep | grep -i -e xway -e labwc

Then do

pm2 stop all
cd MagicMirror 
npm run start:x11

Does MagicMirror start now?

Scruffy

@sdetweil

I ran the first command and this is the output:

~ $ ps -ef | grep -v grep | grep -i -e xway -e labwc
ferguson   66504       1  0 15:32 ?        00:00:01 /usr/bin/Xwayland -auth /home/ferguson/.Xauthority :0 -rootless -core -terminate 10 -listenfd 28 -listenfd 29 -displayfd 88 -wm 82

When I run the last commands, it’s still not launching. The MM screen flickers up for a second and then goes away. This isn’t unique to the above steps.

Logs look similar, if not the same:

[306765:0406/201018.874374:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: No such file or directory (2)
[306765:0406/201018.874626:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:281] Failed to initialize Wayland platform
[306765:0406/201018.874711:ERROR:ui/aura/env.cc:246] The platform failed to initialize.  Exiting.
/home/ferguson/MagicMirror/node_modules/electron/dist/electron exited with signal SIGSEGV
[307094:0406/201032.033709:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: No such file or directory (2)
[307094:0406/201032.033832:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:281] Failed to initialize Wayland platform
[307094:0406/201032.033866:ERROR:ui/aura/env.cc:246] The platform failed to initialize.  Exiting.
/home/ferguson/MagicMirror/node_modules/electron/dist/electron exited with signal SIGSEGV

Strange indeed.

sdetweil

@Scruffy ok, try

npm run start:wayland

Scruffy

@sdetweil said:

npm run start:wayland

Unfortunately, still no go.

The whole system is feeling sluggish… I wounder if it’s an SD issue…?

I have a new SD card arriving later today. I’ll image and reinstall MM and report back.

If it’s still not working, I’ll provide the logs again.

Cannot thank you enough, @sdetweil. You’re incredibly responsive and your support is greatly appreciated.

Cheers!

sdetweil

@Scruffy use my backup/restore scripts to save and restore your MagicMirror config and modules list

https://github.com/sdetweil/MagicMirror-backup-restore
Backup, copy off backup folder, tiny size

Install new MagicMirror and copy back folder and restore

atwist

@Scruffy I actually never resolved my issue either. But, my system was very sluggish as well.

sdetweil

@atwist the latest PI OS is larger than the previous versions…

leading to more swapping. This can affect performance because of the speed of the SD card.

free -m

will tell you how much memory and swap space you are using.

Scruffy

@atwist what did you end up doing? Or are you still without MM working?

Scruffy

@sdetweil I ran the command and this is my output.

             total       used      free      shared     buff/cache   available
Mem:         3992        2153      210       550        2126         1839
Swap:        511         30        481

Is the output in MB? Doesn’t seem like it’s to the point where everything is so slow to respond.

sdetweil

@Scruffy pi4, 4 gig?

Scruffy

@sdetweil Pi 5 4GB

Scruffy

@sdetweil UPDADE:

I have MagicMirror back up and running using a new SD card. I’m guessing the old one died for whatever reason since the whole system was becoming extremely sluggish to the point it would take 10 seconds between input commands triggering.

Glad to be back up and running!

Thank you again for all your help troubleshooting and support us!

Cheers!

sdetweil

@Scruffy awesome!!! Thanks for the feedback!

How did you migrate your config ?
Just interested in how people do things

Scruffy

@sdetweil I’m still very new to Linux/Pi so I was concerned I may have corrupted my original config file(s) with all the changes/modifications I was performing when trying to get the original system back up and running.

I copied over the old config.js which has all my module settings.

I installed MM from scratch along with all the modules. I then brought up both config.js files in Geany and copied and pasted over my configurations.

Not the cleanest of methods but it worked lol.

sdetweil

@Scruffy thanks.

sdetweil

@Scruffy I strongly recommend using some backup/restore mechanism,
please see my backup/restore scripts for one approach.

they also support versioning, so you can tell one set of changes from another and can go back or forward…
and move between systems. too…

https://github.com/sdetweil/MagicMirror-backup-restore.git

and I also support the install/upgrade scripts, mentioned in the MM doc, Alternative install section

magicmikael

@sdetweil, I am running into a similar occurrence but from your initial post I don’t have pm2 installed (as you can see below). Any advice would be appreciated. I have completely reimaged my Pi and retried the steps.

I followed all of the standard manual install steps, have git and node and npm.

This is what I am getting when attempting to run ‘node --run start’

Starting server on port 8080 …
[1877:0409/161415.143762:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: No such file or directory (2)
[1877:0409/161415.143988:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:281] Failed to initialize Wayland platform
[1877:0409/161415.144045:ERROR:ui/aura/env.cc:246] The platform failed to initialize. Exiting.
/home/onthewall/MagicMirror/node_modules/electron/dist/electron exited with signal SIGSEGV

System Information

SYSTEM: manufacturer: Raspberry Pi Foundation; model: Raspberry Pi 4 Model B Rev 1.2; virtual: false; MM: v2.35.0
OS: platform: linux; distro: Debian GNU/Linux; release: 13; arch: arm64; kernel: 6.12.75+rpt-rpi-v8
VERSIONS: electron: 41.1.0; used node: 24.14.1; installed node: 24.14.1; npm: 11.11.0; pm2:
ENV: XDG_SESSION_TYPE: undefined; MM_CONFIG_FILE: undefined
WAYLAND_DISPLAY: wayland-1; DISPLAY: undefined; ELECTRON_ENABLE_GPU: undefined
RAM: total: 3796.68 MB; free: 3304.59 MB; used: 492.10 MB
OTHERS: uptime: 1 minutes; timeZone: America/Los_Angeles

sdetweil

@magicmikael as we said in the readme notes on the release

We changed
npm start/node —run start

To launch for Wayland compositor

If you are still on x11
You need to use

npm run start:x11
Or
node —run start:x11

magicmikael

@sdetweil, I ran a fresh install of the OS (64-bit). I would have assumed it would be all set for Wayland. Confirmed under raspi-config its “Wayland” but strangely

echo $XDG_SESSION_TYPE

returns nothing.

I am thinking of going the pm2 route and trying to launch using your aforementioned script but I can’t imagine it would yield another result.

sdetweil

@magicmikael if you do env

Do you see wayland_display in the list?

The script sets WAYLAND_DISPLAY if not already set

Here is the script , make sure to make it executable
chmod +x mm.sh

#!/bin/bash
cd ~/MagicMirror

if [ $(ps -ef | grep -v grep | grep -i -e xway -e labwc | wc -l) -ne 0 ]; then 
   # if WAYLAND_DISPLAYis set, use it, else set to -0
   export WAYLAND_DISPLAY=${WAYLAND_DISPLAY:=wayland-0}
   npm run start:wayland
else
   DISPLAY=:0 npm run start:x11
fi