Failed to Connect to Wayland Display

sdetweil

pm2 status
Then
pm2 start xxx

Where xxx is the name or number of the row in the status output

Then pm2 save

And the sudo reboot

atwist

@sdetweil Unfortunately, it still doesn’t start after reboot. It does continue to work if i start it manually.

Log file
|MagicMir | [2991:0228/201716.146315:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:282] Failed to initialize Wayland platform
0|MagicMir | [2991:0228/201716.146344:ERROR:ui/aura/env.cc:257] The platform failed to initialize. Exiting.
0|MagicMir | /home/twist/MagicMirror/node_modules/electron/dist/electron exited with signal SIGSEGV
0|MagicMir | [3075:0228/201721.692197:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: No such file or directory (2)

sdetweil

@atwist do this

pm2 status
pm2 info xxxx

where xxxx is the name/number on the row that contains the MagicMirror app

see the line in the output (example from my Mac, )

 script path       │ /Users/sam/MagicMirror/installers/mm.sh

is it pointing to the correct sh file??

hrt13

@atwist
I know this may be a bit late, I had the same problem on my Raspberry Pi3 after I updated to the latest MM.
I spent some time trying to get Wayland running, but wasn’t really successful. Finally, I changed my mm.sh script to:

#!/bin/bash
cd ~/MagicMirror

npm run start:x11

And that got it working again using: pm2 start|restart mm

sdetweil

@hrt13 yes, the release notes indicate that the npm start defaults to Wayland now…

VinGroot

@hrt13

@hrt13 said:

@atwist
I know this may be a bit late, I had the same problem on my Raspberry Pi3 after I updated to the latest MM.
I spent some time trying to get Wayland running, but wasn’t really successful. Finally, I changed my mm.sh script to:

#!/bin/bash
cd ~/MagicMirror

npm run start:x11

And that got it working again using: pm2 start|restart mm

I got something similar, my version of mm.sh:

#!/bin/bash
cd /home/pi/MagicMirror
DISPLAY=:0 node --run start:x11

hrt13

@sdetweil I modified your script from earlier to:

#!/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
   npm run start:x11
fi

sdetweil

@hrt13 yes, I fixed it the same way for new installs

Need some time to fix for existing

I have fixed upgrade to update mm.sh for start:x11 if wayland is not running

Scruffy

@sdetweil

I’m having a similar issue and I’ve been following this post but I still can’t resolve the error.

[94483:0406/164800.222694:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: No such file or directory (2)
[94483:0406/164800.222815:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:281] Failed to initialize Wayland platform
[94483:0406/164800.222849:ERROR:ui/aura/env.cc:246] The platform failed to initialize.  Exiting.
/home/ferguson/MagicMirror/node_modules/electron/dist/electron exited with signal SIGSEGV
[94821:0406/164812.960910:ERROR:ui/ozone/platform/wayland/host/wayland_connection.cc:202] Failed to connect to Wayland display: No such file or directory (2)
[94821:0406/164812.962540:ERROR:ui/ozone/platform/wayland/ozone_platform_wayland.cc:281] Failed to initialize Wayland platform
[94821:0406/164812.962598:ERROR:ui/aura/env.cc:246] The platform failed to initialize.  Exiting.

I’m currently using the following lines in 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
   npm run start:x11
fi

Running the PM2 shows the status is online.

Any help would be greatly appreciated.

Cheers!

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