wkhtmltopdf generates from PDF format on Ubuntu without X Server

Question

Is it possible to set format of PDF to generate in wkhtmltopdf?
From my PC wkhtmltopdf generates format "PDF-1.4"

But remote Ubuntu 14.04 server that is generating pdf with a 'virtual' X server using xvfb giving format PDF-0:

The only problem is opening generated pdf file in Chrome :)
Chrome cannot open PDF-0.

Thanks

Answer 1

It looks like the resulting PDF from xvfb might not be 100% correct. There are some problems with the meta data. It's missing the creator for example. Also PDF-0 does not appear to be a valid PDF version. There might be other problems with the document. This would be a possible reason why the generated file does not appear in Chrome.

A good way to examine the document would be using Acrobat's preflight tool. It will inspect the document for potential problems, and that could give provide a clue on what's going on. The tool is located under "Print Production" in Acrobat. The profile to run is called "Report PDF syntax issues". I'm sure there are other tools out there that can also explain what is wrong with the document.

This section should provide a resolution to the problem. As mentioned in the comments below, updating the QT version from 4.8.6 to something newer should resolve the issue. The working setup appears to be running 5.3.2, while the non working one is under QT 4.8.6.