Fix for using Webex on Linux

Webex does not work on Ubuntu 24.04/Noble systems.

Thanks to Michael Heilmann, the error is related to a missing apparmor profile.

I did fix this bug by adding a apparmor profile for Webex into a new file here “/etc/apparmor.d/Webex”:

abi <abi/4.0>,
include <tunables/global>

profile Webex /opt/Webex/bin/CiscoCollabHost flags=(unconfined) {
    userns,

# Site-specific additions and overrides. See local/README for details.
include if exists <local/Webex>
}

Afterwards you need to reload the profiles with

$ sudo systemctl reload apparmor

I received the following warning for when I followed Michael’s steps:

Warning: The unit file, source configuration file or drop-ins of
apparmor.service changed on disk. Run 'systemctl daemon-reload' 
to reload units.

So, I ran:

$ sudo systemctl daemon-reload 

And, Webex now runs properly again.

A caution should be noted, however. The apparmor profile here is “unconfined.” So, there must be some trust that Cisco/Webex will both maintain security with the app (which is NOT open source) and be responsible itself.

Given how little I use Webex, this compromise is acceptable at the moment.