UserAgent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:50.0) Gecko/20100101 Firefox/50.0

Example URL:
https://www.google.com/ddm/bidmanager/

Steps to reproduce the problem:
1. Start Headless ChromeDriver
2. Go to url "https://www.google.com/ddm/bidmanager/"
3. Find by id "Email" or "identifierId" (this is the text box for the username)
4. SeleniumService.sendKey (input the user name)

What is the expected behavior?
I expect it to input the username into the text box

What went wrong?
When I try and call Webdriver.sendkeys I am getting the error:
WebDriverException: unknown error: an X display is required for keycode conversions, consider using Xvfb

This is happening while running a python test and while running a test in java. If I wrap the commands in Xvfb-run commands then I can get both projects to work fine. We were hoping that the new chrome 59 headless functionality would eliminate the need for us to use Xvfb. From the documentation that I have seen this is supposed to be the case. Is there any advice you can give on this? Thanks!

I am using the following:
chromedriver 2.29
Selenium 3.44 have also tried it with 2.44
Chrome 59 Beta
CentOS Linux release 7.3.1611

Does it occur on multiple sites: Yes

Is it a problem with a plugin? N/A 

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 59  Channel: n/a
OS Version: 
Flash Version: