[Solved] Error: GDK_BACKEND does not match available displays; Running Selenium using Crontab

I am trying to run selenium using cron.

import os
from selenium import webdriver
from selenium.webdriver.firefox.options import Options
from pyvirtualdisplay import Display
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

firefox_capabilities = DesiredCapabilities.FIREFOX
firefox_capabilities['marionette'] = True

firefox_capabilities['handleAlerts'] = True
firefox_capabilities['acceptSslCerts'] = True
firefox_capabilities['acceptInsecureCerts'] = True

binary = webdriver.firefox.firefox_binary.FirefoxBinary("/usr/bin/firefox")

now =
print "* Time of RUN : ",now

display = Display(visible=0, size=(1024, 768))
# display.start()
browser = webdriver.Firefox(firefox_binary=binary,executable_path=os.getcwd()+'/geckodriver')
print browser.title

# display.stop()

Following is the error displayed in geckodriver.log

1525859641163   geckodriver INFO    geckodriver 0.20.1
1525859641167   geckodriver INFO    Listening on
1525859642167   mozrunner::runner   INFO    Running command: "/usr/bin/firefox" "-marionette" "-profile" "/tmp/rust_mozprofile.1xUlJhxoO4Ar"
Error: GDK_BACKEND does not match available displays

things I tried:

  1. tried running selenium without display (pyvirtualdisplay) i.e headless selenium
  2. tried binary parameter while invoking webdriver.firefox()
  3. tried geckodriver excutable(linux) in webdriver.firefox()
  4. used export Dispaly=:0; in the cron cmd
Enquirer: Prince


Solution #1:

  1. update latest geckodriver

  2. download latest firefox tarball and follow this step

3.Install the official Firefox Beta PPA

  $ sudo apt-add-repository ppa:mozillateam/firefox-next

4.Run apt-get update

 $sudo apt-get update
  1. Install firefox and xvfb (the X windows virtual framebuffer) packages

    $ sudo apt-get install firefox xvfb
  2. Run Xvfb in the background and specify a display number (10 in my example)

    $ Xvfb :10 -ac &
  3. Set the DISPLAY variable to the number you chose

    $ export DISPLAY=:10
  4. test the code
    #!/usr/bin/env python
    from selenium import webdriver
    browser = webdriver.Firefox()

firefox if you download as tar it helps to avoid download dependency files


Note your firefox code should have headless option inorder to avoid displaying window.

Respondent: senthil sivasamy

The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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