MM not starting when HDMI is connected

[AnduriI]

Hey,

up to now my MagicMirror was only in test mode and accessed via browser. Now I wanted to install it with a monitor on my mirror. If the RPi is not connected to HDMI, it works great. But as soon as I connect it and reboot it does not work. I can see the bootup of the RPi and a splash screen of MagicMirror saying “booting up”, but after that only a period of time a black cross and than the desktop. I also can not connect via browser, so MM is definetly not running. I will append the ~/MagicMirror/npm-debug.log
pm2 is listing MagicMirror as running.
When I disconnect the HDMI and reboot it works again from my browser. Can anyone please help?

0 info it worked if it ends with ok
1 verbose cli [ '/usr/bin/node', '/usr/bin/npm', 'start' ]
2 info using npm@3.10.10
3 info using node@v6.13.0
4 verbose run-script [ 'prestart', 'start', 'poststart' ]
5 info lifecycle magicmirror@2.2.2~prestart: magicmirror@2.2.2
6 silly lifecycle magicmirror@2.2.2~prestart: no script for prestart, continuing
7 info lifecycle magicmirror@2.2.2~start: magicmirror@2.2.2
8 verbose lifecycle magicmirror@2.2.2~start: unsafe-perm in lifecycle true
9 verbose lifecycle magicmirror@2.2.2~start: PATH: /usr/lib/node_modules/npm/bin/node-gyp-bin:/home/pi/Magic$
10 verbose lifecycle magicmirror@2.2.2~start: CWD: /home/pi/MagicMirror
11 silly lifecycle magicmirror@2.2.2~start: Args: [ '-c', 'sh run-start.sh' ]
12 silly lifecycle magicmirror@2.2.2~start: Returned: code: 1  signal: null
13 info lifecycle magicmirror@2.2.2~start: Failed to exec start script
14 verbose stack Error: magicmirror@2.2.2 start: `sh run-start.sh`
14 verbose stack Exit status 1
14 verbose stack     at EventEmitter. (/usr/lib/node_modules/npm/lib/utils/lifecycle.js:255:16)
14 verbose stack     at emitTwo (events.js:106:13)
14 verbose stack     at EventEmitter.emit (events.js:191:7)
14 verbose stack     at ChildProcess. (/usr/lib/node_modules/npm/lib/utils/spawn.js:40:14)
14 verbose stack     at emitTwo (events.js:106:13)
14 verbose stack     at ChildProcess.emit (events.js:191:7)
14 verbose stack     at maybeClose (internal/child_process.js:920:16)
14 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:230:5)
15 verbose pkgid magicmirror@2.2.2
16 verbose cwd /home/pi/MagicMirror
17 error Linux 4.9.35-v7+
18 error argv "/usr/bin/node" "/usr/bin/npm" "start"
19 error node v6.13.0
20 error npm  v3.10.10
21 error code ELIFECYCLE
22 error magicmirror@2.2.2 start: `sh run-start.sh`
22 error Exit status 1
23 error Failed at the magicmirror@2.2.2 start script 'sh run-start.sh'.
23 error Make sure you have the latest version of node.js and npm installed.
23 error If you do, this is most likely a problem with the magicmirror package,
23 error not with npm itself.
23 error Tell the author that this fails on your system:
23 error     sh run-start.sh
23 error You can get information on how to open an issue for this project with:
23 error     npm bugs magicmirror
23 error Or if that isn't available, you can get their info via:
23 error     npm owner ls magicmirror
23 error There is likely additional logging output above.
24 verbose exit [ 1, true ]