How do I get WebEx working with audio on Ubuntu?

All we need is an easy explanation of the problem, so here it is.

There is no one guide that I have tried that results in a fully working WebEx on Linux. Typically audio is the feature hardest to get working. How do I get WebEx working with audio on Ubuntu?

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

2019 update: WebEx through Chrome on Ubuntu works fine for me with screen sharing (even in personal rooms) and the ability to start meetings. You should use the url with “meet” in it not “join” for personal rooms eg.

The steps below may not work anymore.

The following steps should work (tested on Mint 18 based on Ubuntu 16.04 and Mint 19 based on Ubuntu 18.04):

  1. Remove 64 bit Firefox if installed:

    sudo apt-get remove firefox
  2. Install 32 bit Firefox 52 (or earlier version). Go to download and extract the 32-bit Firefox ESR installer. Make sure it doesn’t auto update by changing the update settings in preferences.

  3. For Firefox 52: Launch Firefox and type about:config in the location bar.

  4. For Firefox 52: Accept the risks and then add a key (right click mouse → New → Boolean)

  5. For Firefox 52: Call the key plugin.load_flash_only and set it to false

  6. For Firefox 52: Add a Firefox extension for switching the user agent e. g. User-Agent Switcher or edit the general.useragent.override string property.

  7. For Firefox 52: Set the user agent to an earlier version of Firefox on Linux e. g.

    Mozilla/5.0 (X11; Linux i586; rv:31.0) Gecko/20100101 Firefox/31.0
  8. Close Firefox

  9. Download the .tar.gz 32-bit JRE package for Linux on and store the file in the folder Downloads in your home folder (i. e. ~/Downloads). It will be of the form: jre-8u161-linux-i586.tar.gz.

  10. Then do the following to extract the JRE in a shell:

    sudo mkdir -p -v /opt/java/32
    cd ~/Downloads
    tar -zxvf jre-8u161-linux-i586.tar.gz
    sudo mv -v jre1.8.0_* /opt/java/32
  11. Now the Java needs to be linked to Firefox. In a shell:

    mkdir -p ~/.mozilla/plugins/
    cd /opt/java/32/jre1.8.0_161
    ln -sf $PWD/lib/i386/ ~/.mozilla/plugins/
  12. Launch Firefox and WebEx should now work.

  13. If it doesn’t work and the wrong Java plugin appears to be loaded e. g. IcedTea, then remove them in a shell:

    sudo apt-get remove icedtea-plugin icedtea-8-plugin icedtea-netx icedtea-netx-common 
  14. If Firefox 32 bit or Java or WebEx don’t work, there may be missing dependencies. Try:

    sudo apt-get install libgtk-3-0:i386 libasound2:i386 libdbus-glib-1-2:i386 libxt6:i386 libxtst6:i386 libcanberra-gtk-module:i386 libcanberra-gtk3-module:i386 topmenu-gtk3:i386 libpangoxft-1.0-0:i386 libxft2:i386 libpangox-1.0-0:i386 libxmu6:i386 libxv1:i386 libasound2-plugins:i386

Method 2

Another and probably the simplest way is to use ( Chrome web store > Extensions > Cisco Webex Extension );I have just tested it on Ubuntu 16.04 with Chrome version 60.3 and everything but screen sharing (which is not available) works perfectly well.

Please, keep in mind that this is a Chrome based application, not a browser plugin. You’ll need to open that application and use it instead of pasting the URL directly to Chrome.

mid 2018 Update:
webex with screen sharing works perfectly fine on Ubuntu 16/18 on latest Chrome and Firefox using dedicated plugin for screen sharing

early 2018 Update:
Website app has been updated. Now it’s possible to connect easily with all versions of webex so dedicated webex app is not really usefull anymore. Screen sharing on Ubuntu is still not possible though. Tested with chrome.

Method 3

WebEx in VirtualBox

It might be wise to run WebEx inside a virtual machine such as VirtualBox. Without this security measure, the WebEx software will have unrestricted access to your system.

  1. Install VirtualBox:

    sudo apt install virtualbox
  2. Download a 32-bit (i386) Ubuntu ISO and optionally verify the ISO
  3. Install the 32-bit Ubuntu in VirtualBox and run these (and all following) commands there:

    sudo apt install virtualbox-guest-{dkms,utils,x11}
    sudo apt update
    sudo apt full-upgrade
    sudo apt autoremove
    sudo apt install libpangox-1.0-0

    Then reboot the guest OS.
    This enables host/guest shared clipboard, updates the software, and installs a WebEx dependency.

  4. Install Java

    • Alternative 1: OpenJDK

      sudo apt install icedtea-8-plugin

      To remove warnings about missing “Symantec Class 3 SHA256 Code Signing CA” certificate, get the certificate, save it as x.pem, and run:

      sudo keytool -importcert -file x.pem -keystore /etc/ssl/certs/java/cacerts -storepass changeit
    • Alternative 2: Oracle Java
      Oracle Java can be installed via the Web Upd8 Java PPA:

      sudo add-apt-repository ppa:webupd8team/java
      sudo apt update
      sudo apt install oracle-java8-installer
  5. Try a WebEx test meeting
  6. Check whether all dependencies are met:

    ldd ~/.webex/*/*.so | grep -i not => not found => not found => not found
 can be ignored. The libpangox-1.0-0 package mentioned earlier should take care of
    How to find packages containing any other missing files:

    sudo apt install apt-file
    sudo apt-file update
    apt-file search


Tested with Ubuntu 16.04 host and guest OS. Audio was only tested with Oracle Java. is not shown as missing with this command:

LD_LIBRARY_PATH='/usr/lib/jvm/java-8-openjdk-i386/jre/lib/i386:/usr/lib/jvm/java-8-openjdk-i386/jre/lib/i386/server' ldd ~/.webex/*/*.so | grep -i not

Screenshot of the WebEx test meeting


Method 4


On my system I have previously installed 64-bit javaws from icedtea-netx package.

Using default modern Firefox 80 the Cisco Webex site provided download with the JNLP/JWS servlet file named CiscoWebExServlet.

The servlet downloaded all the stuff into ~/.webex/T33_TC and then finally show the Cisco Webex Training window.

With default 64-bit javaws from icedtea-netx it did not work correctly – when I click on Use computer audio and then press Call using computer it showed error message The audio is unaccessible now.


The main problem here is that Cisco WebEx is still a 32-bit application, so we need to get 32-bit Java from Oracle (not OpenJDK) and other dynamic libraries which are needed for WebEx operation.

At first we need to remove the OpenJDK Javaws-related packages:

sudo apt-get purge icedtea-plugin icedtea-8-plugin icedtea-netx icedtea-netx-common icedtea-plugin:i386 icedtea-8-plugin:i386 icedtea-netx:i386
sudo apt-get autoremove --purge

Then manually download 32-bit Oracle Java from its official page to get file named like jre-8u281-linux-i586.tar.gz saved in ~/Downloads folder. Or programmatically by using great hack from ArchLinux PKGBUILD:

cd ~/Downloads
wget --no-cookies --header Cookie:oraclelicense=a --no-glob --no-config --continue --tries=3 --waitretry=3 -O jre-8u281-linux-i586.tar.gz

Then extract it and create symlink for its javaws for example as below:

mkdir ~/Software
cp ~/Downloads/jre-8u281-linux-i586.tar.gz ~/Software
cd ~/Software
tar -xf jre-8u281-linux-i586.tar.gz

sudo ln -sf ~/Software/jre1.8.0_281/bin/javaws /usr/local/bin/javaws

Then install all needed 32-bit libraries to satisfy dynamic linking of libs inside ~/.webex/T33_TC/*.so – with single long command below:

sudo apt-get install libasound2:i386 libatk1.0-0:i386 libc6:i386 libcairo2:i386 libdatrie1:i386 libexpat1:i386 libffi6:i386 libfontconfig1:i386 libfreetype6:i386 libgcc1:i386 libgdk-pixbuf2.0-0:i386 libglib2.0-0:i386 libgraphite2-3:i386 libgtk2.0-0:i386 libharfbuzz0b:i386 libice6:i386 libpango-1.0-0:i386 libpangocairo-1.0-0:i386 libpangoft2-1.0-0:i386 libpangoxft-1.0-0:i386 libpcre3:i386 libpixman-1-0:i386 libpng12-0:i386 libselinux1:i386 libsm6:i386 libstdc++6:i386 libthai0:i386 libuuid1:i386 libx11-6:i386 libxau6:i386 libxcb1:i386 libxcb-render0:i386 libxcb-shm0:i386 libxcomposite1:i386 libxcursor1:i386 libxdamage1:i386 libxdmcp6:i386 libxext6:i386 libxfixes3:i386 libxft2:i386 libxi6:i386 libxinerama1:i386 libxmu6:i386 libxrandr2:i386 libxrender1:i386 libxt6:i386 libxtst6:i386 libxv1:i386 zlib1g:i386

Finally on next download of CiscoWebExServlet and its launch you will be able to use audio, screen sharing and other functions of Cisco Webex Training.


  1. you may need to associate JNLP/JWS file single time with javaws by specifying this executable name in Open With dialog of file-manager.
  2. the above method was tested on 64-bit Ubuntu MATE 16.04.7 LTS and 18.04.5 LTS.
  3. webcam streaming and local recording are not possible using this Java-based application.

Known problems:

  1. if you see error like "unable to load resource" "atdnwld.jar" after launching CiscoWebExServlet then launch ~/Software/jre1.8.0_281/bin/jcontrol, click Network Settings and select Direct connection here. click OK.

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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