Grafana on debian8 does not start, socket 3000 permission denied

I followed the instructions on your page for installing grafana (on armhf, debian jessie)

Problem is the service does not start due to lvl=eror msg=“Server shutdown” logger=server reason=“listen tcp 0.0.0.0:3000: socket: permission denied”

What can I do to fix this permission error?
Any help appreciated!

Logfile here:

t=2018-09-24T17:35:25+0300 lvl=info msg=“Starting Grafana” logger=server version=5.2.4 commit=0bbac5c compiled=2018-09-07T17:35:16+0300
t=2018-09-24T17:35:25+0300 lvl=info msg=“Config loaded from” logger=settings file=/usr/share/grafana/conf/defaults.ini
t=2018-09-24T17:35:25+0300 lvl=info msg=“Config loaded from” logger=settings file=/etc/grafana/grafana.ini
t=2018-09-24T17:35:25+0300 lvl=info msg=“Config overridden from command line” logger=settings arg=“default.paths.data=/var/lib/grafana”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Config overridden from command line” logger=settings arg=“default.paths.logs=/var/log/grafana”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Config overridden from command line” logger=settings arg=“default.paths.plugins=/var/lib/grafana/plugins”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Config overridden from command line” logger=settings arg=“default.paths.provisioning=/etc/grafana/provisioning”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Path Home” logger=settings path=/usr/share/grafana
t=2018-09-24T17:35:25+0300 lvl=info msg=“Path Data” logger=settings path=/var/lib/grafana
t=2018-09-24T17:35:25+0300 lvl=info msg=“Path Logs” logger=settings path=/var/log/grafana
t=2018-09-24T17:35:25+0300 lvl=info msg=“Path Plugins” logger=settings path=/var/lib/grafana/plugins
t=2018-09-24T17:35:25+0300 lvl=info msg=“Path Provisioning” logger=settings path=/etc/grafana/provisioning
t=2018-09-24T17:35:25+0300 lvl=info msg=“App mode production” logger=settings
t=2018-09-24T17:35:25+0300 lvl=info msg=“Writing PID file” logger=server path=/var/run/grafana-server.pid pid=28064
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing SqlStore” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Connecting to DB” logger=sqlstore dbtype=sqlite3
t=2018-09-24T17:35:25+0300 lvl=info msg=“Starting DB migration” logger=migrator
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing SearchService” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing PluginManager” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Starting plugin search” logger=plugins
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing InternalMetricsService” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing AlertingService” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing HTTPServer” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing CleanUpService” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing NotificationService” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing ProvisioningService” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing RenderingService” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing TracingService” logger=server
t=2018-09-24T17:35:25+0300 lvl=info msg=“Initializing Stream Manager”
t=2018-09-24T17:35:25+0300 lvl=info msg=“HTTP Server Listen” logger=http.server address=0.0.0.0:3000 protocol=http subUrl= socket=
t=2018-09-24T17:35:25+0300 lvl=eror msg=“Stopped HTTPServer” logger=server reason=“listen tcp 0.0.0.0:3000: socket: permission denied”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped NotificationService” logger=server reason=“context canceled”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped Stream Manager”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped PluginManager” logger=server reason=“context canceled”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped RenderingService” logger=server reason=nil
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped ProvisioningService” logger=server reason=“context canceled”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped TracingService” logger=server reason=nil
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped CleanUpService” logger=server reason=“context canceled”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped InternalMetricsService” logger=server reason=“context canceled”
t=2018-09-24T17:35:25+0300 lvl=info msg=“Stopped AlertingService” logger=server reason=“context canceled”
t=2018-09-24T17:35:25+0300 lvl=eror msg=“Server shutdown” logger=server reason=“listen tcp 0.0.0.0:3000: socket: permission denied”
android@localhost:/$

both grafana-server and grafana-cli run as root

-rwxr-xr-x 1 root root 15114672 Mar 28 22:53 grafana-cli
-rwxr-xr-x 1 root root 28368224 Mar 28 22:52 grafana-server