I need to connect my DVD player with HDMI output to a monitor which has only VGA and DVI-D ports.
On eBay there's this cheap HDMI to DVI-D adapter:

Is a simple adapter like this, all that's needed to make the conversion?
Or do I need an actual signal converter to do the job?
1 Answer
The adapter is all that you need. HDMI is backwards compatible with DVI because they have the same electrical specifications for their pin outs. So you'll be able to simply plug it in and be good to go.
The only concern I have is that the audio may or may not work.
Features specific to HDMI, such as remote-control and audio transport, are not available in devices that use legacy DVI-D signalling. However, many devices output HDMI over a DVI connector and some multimedia displays may accept HDMI (including audio) over a DVI input. Source
I also used an HDMI to DVI cable, virtually the same thing as an adapter, on my PC. In my case the carrying of audio did work fine. But this was coming from a DVI out port on an Nvidia GTX 680, to a new Samsung monitor.