QXcbConnection: Could not connect to display

[samcontesse]

1. Which version of PhantomJS are you using?
   Version 2.1.1
2. What steps will reproduce the problem?
   1. Open a shell
   2. Type phantomjs
   3. Press enter
3. Which operating system are you using?
   Ubuntu 16.04 LTS
4. Did you use binary PhantomJS or did you compile it from source?
   Binary from the official Ubuntu repository - version 2.1.1+dfsg-1
5. Please provide any additional information below.
   This is a fresh install, no X11 library has been installed (headless).

QXcbConnection: Could not connect to display 
PhantomJS has crashed. Please read the bug reporting guide at
<http://phantomjs.org/bug-reporting.html> and file a bug report.
Aborted

[vitallium]

1. We don't support official packages from repositories for distros. Because they are usually modified. Like this one.
2. List of dependencies for this package contains excess packages that are not needed to build PhantomJS:

libjs-coffeescript
libx11-dev,
libxext-dev,
libqt5webkit5-dev

If you compiled PhantomJS with X11 enabled, it will use XCB (X11) platform in runtime, which is not supported in headless environment. Instead of that you must build PhantomJS without X11 headers (dev packages installed)

[samcontesse]

Thank you for your help. The official Linux 64-bit build works as expected.

[zackw]

For future reference, this sort of breakage is caused by compiling PhantomJS against a system-supplied QtBase instead of our bundled version. The bundled version has been substantially modified; one of the changes is to avoid pulling in X11 libraries.

[vitallium]

@zackw for future reference, Qt 5.6 bundled with offscreen platform, which we can be used in PhantomJS to build against system-supplied Qt. :-)

[hashar]

The Debian bug is https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=817277