I understand that this is an old post, but as there are basically no other results for this black screen issue I figured I'd share what we just learned about this recently. Skip to the end for solution.
In our environment, the black screen was ultimately being caused by a permissions error, but one that was not readily apparent. The traces were showing a number of access denied errors at the root of our profile store that looked something like this:
java.io.FileNotFoundException: \\contoso.com\DfsRoot\users$\%FILE.EXT% (Access is denied)
Now, this made no sense to me. Why is it trying to save files to the root of the profile share? I started looking through ProcMon results and found similar errors. I compared against the ProcMon results for a working user and think I've worked out what's happening.
Problematic User: CreateFile || \\contoso.com\DfsRoot\Users$ || NAME NOT FOUND || Disposition: Open
Working User: CreateFile || \\contoso.com\DfsRoot\Users$ || SUCCESS || Disposition: Open QueryDirectory || \\contoso.com\DfsRoot\Users$\username || SUCCESS ...
From this I gathered that the issue was being caused because communicator couldn't open the user share in order to check for the existence of the user's profile folder. I suspect that it was then failing to append the path for the user's roaming app data to the root file path above.
Granted Creator Owner full access to subfolder and files at the root of the profile share. Granted Everyone Read access to the root of the profile share (but not to subfolders).
Webex Adoption Ebooks
Use our adoption toolkits to get your organization started with Cisco Webex Events, Training, and Support, as well as Webex Edge and Pro Pack products.
Choose from our selection of a...
Webex Board Use Cases
Use cases can help your users understand the value of new technology quickly by showing them how it will benefit their daily workflows.
We’ve written twelve compelling use cases that show you how Webex Boards can make ...
Introduce your users to Webex Boards with a promotional email.
Let employees know what Webex Boards are, why you invested in them, when they will be available for everyone to use, and ‘What’s in it for me?’ for end users.
Want a prebuilt template?...