webview with no PhantomJS present? that’s the main point. there should be no PhantomJS on your machine at all.
is a slightly different url, see my example. if you are using the same url as you are with image then there is no difference as far as Grafana is concerned.
actually, that version comes with PhantomJS. and if your are generating static images in that version your are using PhantomJS to do so.
The newer version of grafana does not ship with PhantomJS and has no ability to generate static image charts unless you go out of your way to install PhantomJS yourself.
they got rid of PhantomJS for a reason…
because older versions of grafana have anyways used PhantomJS and shipped with Phantonjs. they dropped the library with the latest version because PhantomJS is old, buggy, and no longer being maintained. they did not, however, provide a replacement for the functionality that library provided. so your choice is to manually install PhantomJS yourself and suffer the consequences, or abandon generating static chart images.
is only required to be installed manually from 5.2.0. Previous versions of Grafana ship with the library as part of it.
This is what I was trying to get at in the recommendation thread. if you are using the latest version of grafana which is installed by OpenHABian then you should not be experiencing this sort of problem. it is the manual steps you took to add PhantomJS which ultimately led to the problem.