That link is to the Ubuntu Forums, where anyone can write a message. I've
written a couple of thousand myself.

The reason people can't help with your DVD problem, is that for almost everyone,
their DVD player just works. I put in a disc, it works, I write to a CD-R or
DVD-R, it just works. The most difficult thing I have to do is press the button
to open the tray.

If I had a problem, I wouldn't know where to start, except at the hardware
level.

If you use Google to try to find help, try adding the word "solved" to your
query.