I haven't had a chance to try HDMI out. I'll have a look at it this afternoon. I did not use an SSDT to the best of my knowledge.
As for the trackpad, it is an ALPS model (I had previously looked it up from an Ubuntu live stick that I have). I had already tried the ALPS driver that you suggested back in early November, prior to your posts in that thread. As a matter of fact, I also have the refurb Inspiron 13z-5323 that user bmp152 has, and had the exact same issues with the driver (I could point and click, but no scrolling and no dragging; with the current kexts I'm using, I can at least drag, otherwise I have to use a USB mouse to re-position windows). Happy to hear that you are looking at recompiling the driver (and hope that you've recovered from your PDAnet issue).
H