in the latest PI OS,

desktop
top left menu
preferences
screen configuration
pick left/right/invert

pm2 status

whatever the number is or use the NAME of the entry instead of the number

or use the name
MagicMirror

whatever shows in

pm2 status

do

pm2 delete 4
pm2 save -f
rm -rf MagicMirror

then run my install script

see
https://github.com/sdetweil/MagicMirror_scripts

it will prompt if u want pm2 again
and for turn off screen saver

does everything

also would it be worth a try to just completely delete everything and then start from scratch?

then

cd ~/MagicMirror
npm start 

pm2 status again

also, how did you install mm? manual or my automated script?

did you setup MM autostart before adding pm2?

ps -ef | grep -i magicmirror

ok do

we will delete 1 entry so you don’t have 2 trying to run at the same time
and then reboot

pm2 delete  1
pm2 save
sudo reboot 

you didn’t do pm2 stop all

after doing test

ps -ef | grep -i magicmirror

should return nothing

then i did start pm2 start 4, and it started, but was still a blank screen

do

pm2 stop all 
cd ~/MagicMirror
npm install electron@17.2.0
npm start 

mm should come up

minimize mm (alt-spacebar, n)

ctrl-c to stop running instance

then

pm2 status

this will show the status or pm2 managed apps.

┌────┬────────────────────┬──────────┬──────┬───────────┬──────────┬──────────┐
│ id │ name               │ mode     │ ↺    │ status    │ cpu      │ memory   │
├────┼────────────────────┼──────────┼──────┼───────────┼──────────┼──────────┤
│ 0  │ MagicMirror        │ fork     │ 0    │ online    │ 0%       │ 2.7mb    │
└────┴────────────────────┴──────────┴──────┴───────────┴──────────┴──────────┘

use the name or the row number

pm2 start xxx

xxx is the name or the row number
for example

pm2 start 0 

either via
npm start
or
pm2

if pm2., then
pm2 logs --lines=50

will show the console output

what pi is this?