AVS › AVS Forum › Video Components › Home Theater Computers › HTPC - Mac Chat › Mac Mini, HDMI Switch and a HDTV - Not Straight Forward
New Posts  All Forums:Forum Nav:

Mac Mini, HDMI Switch and a HDTV - Not Straight Forward

post #1 of 5
Thread Starter 
Hi Guys,

I've only recently installed a Mac Mini as a HTPC to my 50" Fujitsu plasma (1366x768). Initially I had the Mini connected via VGA using SwitchResX with a resolution of 1360x768. To be honest, I was disappointed, the picture was a bit soft for my liking with video and HDTV (via Miglia TVMini) when compared to my HD set top box connected via HDMI. In addition, I'm in Australia which broadcasts at 50Hz, so running at VGA 60Hz introduced micro judder into the HDTV pans.

So next I tried HDMI via a DVI to HDMI cable. OMG! What a difference! While the resolution was only 720 x 1280 I could set the refresh to 50Hz (no judder on HDTV anymore) and the image was razor sharp! HDTV and 1080p video clips looked stunning! The detail and clarity was very impressive. While there was a small amount of overscan (about 10 pixels) the Fujitsu controls allows you to easily adjust for this to get a perfectly centred image filling the whole screen. Interestingly, while 1280x720 isn't 1:1 for the Fujitsu, the text on the desktop looks sharper than 1360x768 via VGA.

So at this point all seems fine, well the only minor problem was that the Fujitsu only has one HDMI port. No problem, I went and purchased a HDMI 5 port switch. It's the Australian imported version that Monoprice sell (http://www.monoprice.com). However, when I plugged the Mini into the switch I couldn't get an image! Plug the Mini directly into the TV and it would work fine. To cut a long story short, I discovered that the HDMI switch (and it's not just monoprice's switches, but quite a few brands) don't pass the TV's EDID data to the Mini. This is the protocol the Mini uses to determine what resolution to sync with the TV. I confirmed this via VNC. When plugged into the switch the Mini had no idea what it was trying to talk to. When plugged directly into the TV it knew it was a Fujitsu.

The happy ending is that you can fix the problem by purchasing 'DVI Doctor' (http://www.monoprice.com/products/pr...ormat=2&style=)
This learns the EDID protocol from your TV, then sits between the Mini and the HDMI switch and fools the Mini into thinking that it is talking directly to the TV. It also solved the problem when you change inputs on the HDMI switch the Mini can lose sync with the TV. The manual even makes specific mention of this problem with the Mac.

So in summary I'm a happy camper now with excellent image quality from the Mini connected to the Fujitsu via a HDMI switch.

Regards,
Stephen
post #2 of 5
Sounds like all worked out well for you. So, the text from the Mini was sharp? What model TV did you buy?

Thanks,
Nate
post #3 of 5
Thread Starter 
Hi Nate,
The text is fine, video image quality is outstanding. Watching something like the ICE AGE 2 1080p quicktime trailer and every hair on Scrat's bushy tail is clearly defined. Watching HDTV through the TVMini is as good as my dedicated HD settop box.
The Plasma I have is the Fujitsu 50" 1366x768 model P50XHA51AS.

Regards,
Stephen
post #4 of 5
whymacs:

Did you happen to ask Monoprice if the combination of using the HDMI switch and DVI Doctor (to learn the EDID protocol from your TV) also would fool the new HDMI-equipped A/V Receivers into thinking that they are talking directly to a cable box? Apparently, most current cable boxes have a design flaw, and do not have what is called an "HDMI repeating" capability. As a result, they exhibit this same problem -- of not passing the video signal through an HDMI-equipped A/V Receiver (acting as a video switch) to an HDTV. Is this the same issue as the EDID protocol?

I'm hoping that the next generation of cable boxes will resolve this, since A/V Receivers with HDMI 1.1 finally are available and affordable. That said, we should start seeing A/V Receivers with HDMI 1.3 (the very latest standard) this fall.
post #5 of 5
This describes and explains the problem I have been having with my Mac Mini and my Optoma projector. It works fine if the projector is connected directly to the mac (via dvi to hdmi converter), and works through my monoprice switch if the mac boots up with the switch and projector on, but stops working if the monoprice hdmi switch powers down when I shut down my system (Mac stays powered on as it also my home server).

I was sad to see the solution might be a $50 part. I wonder if there is a way to do this through a mac os software setting?
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: HTPC - Mac Chat
AVS › AVS Forum › Video Components › Home Theater Computers › HTPC - Mac Chat › Mac Mini, HDMI Switch and a HDTV - Not Straight Forward