If you have a OrangePi or a raspberry pi ,
there is high chance that the version of grafana package in the repositories of your distribution is outdated
in my case , i use armbian , the repo is from ubuntu xenial .
the version of Grafana in the xenial repo is antique (grafana 2.6.0) and the version is bugged if you use a Headless version of the os ,
the icon are not displayed when you are connected to the grafana interface. (because of a bug in phantomJS).
if you have already the 2.6.0 runing , remove it first
apt-get remove grafana
Then use this page to download a recent version of grafana compiled to run on a arm cpu
wget https://github.com/fg2it/grafana-on-raspberry/releases/download/v5.0.4/grafana_5.0.4_armhf.deb then dpkg -i grafana_5.0.4_armhf.deb
if the grafana service is not auto starting at the system boot , you can launch that command :
systemctl enable grafana-server.service
you can check with netstat that your grafana service is running if your server is listening on the tcp port 3000
netstat -tcp -l
now start your browser and try to connect to http://ip-of-your-server:3000