Also, it would be cool, if I knew how I could open a service request for Ubuntu-based XPS laptops.... (regarding my touchpad) issue.
Jared brought me your question. Please add me as a friend and include your service tag and email address. We'll start a case.
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I am using Fedora 25, updated to latest Kernel, and the DA200 Just started working with HDMI with sound at Full HD.
I have no touchpad issues.
Hope that helps
I use a XPS 13 9360 with DA200