Comment 21 for bug 1634449

I also have this problem, and I don't think it's a duplicate:

* The entire external screen turns black intermittently
* The background image is not affected
* The laptop screen does not flicker

Please reopen this bug.

The issue was already fixed in 16.04 by updating to the 4.6/4.8 kernel, unfortunately it seems to pop up again after upgrading to 16.10. I updated to Kernel 4.8.4 and 4.8.0-997, which both don't solve the issue.