Q: No Signal on HDMI TV After Lion Upgrade

That is all fine and good thomasdesign that there is a piece

of hardware that helps.  However, display discovery and

configuration is a fundamental function of a modern OS.

It should not be necessary to buy additional hardware to

fix a fundamental problem.  Especially when no problem

existed on hardware prior to an OS upgrade.

My Mini has no display issues whatsoever when running

Snow Leopard, but is totally flakey with Lion!  Basically

Lion + MacMini ≠ Stability.

I finally have solved my 2009 mini display problems with my 23pf5320 Philips!

Yes, you heard me correctly!

All I did was go to Walmart and buy a new 42" Vizio a few months ahead of my planned display upgrade.  Display is detected just fine and now all I have to deal with are loss of zoom functionality after sleep requiring restart and rampant colorwheels, other stuff and, oh yeah, half my videos are requiring some new codec in iphoto that had worked previously (<sarcasm> it just works</sarcasm>.

I guess you get what you pay for.  $29.  I want to forget about all this mess apple, so I hope we can learn about this in future product launches.

Thank you so much venturas.  I have not had use of my mini the second i downloaded lion launch day.  Put that command in restarted, had to reset pram during start up, then whooosh WORKED.  i work at apple and nobody was able to help! thanks man!

Passing through a receiver through hdmi can be a problem for all modern OSs. I had the same issue with snow leopard. However, when connecting directly from the mini to the 50" Pioneer, I had no problems with either Lion or Snow Leopard. At least in my case, I cannot blame Apple. There's nothing on the box that says it will be compatible with all home theater receivers. Connecting a computer to a home theater is still a geeky endeavor, not for the sort that doesn't have patience. However for those who had it working under SL, and not Lion, I understand your frustration. But, it was only $29, and you can always go back to snow leopard without losing much.

Method to enter terminal command':

In Mac OS X, what is the Terminal, and how do I access it?

The Terminal is the easiest way to access the Unix prompt in Mac OS X. If you're familiar with Unix, you may recognize its similarity to xterm implementations in Linux and other Unix-like operating systems; if not, the Terminal's non-graphical environment may be intimidating. However, it allows you to use built-in command line programs such as SSH and SFTP, and is required for some advanced Mac OS X tasks.

Opening a Terminal window

To open a Terminal window:

1. In the Finder, from the Go menu, choose Utilities.
   
   
2. In the Utilities window, double-click Terminal.

Note: Be careful to enter commands precisely; entering the wrong command can render your computer unusable or cause other problems.

URL link from here, http://kb.iu.edu/data/akpx.html  , let us know whetehr the method work for you

I have to concur with this statement ... my mini had no issues whatsoever with Snow Leopard on the exact same setup.  Having to add a $100+ piece of hardware to workaround software bugs is kind of like using a shotgun to swat a fly.  If indded, as an earlier poster pointed out that the hardware is to blame (trying to detect through an AVR) then why did it still work if I zapped the PRAM but not on a subsequent reboot?

Lion has some serious issues and hopefully Apple will fill in the cracks soon.  If they don't I think that a lot of people are going to be reverting back to Snow Leopard.  You can only dangle a carrot in front of faces for so long until you get bit and honestly if I didn't need to support Lion users I would have reverted already, but sadly I need to keep on top of all the bugs and issues so that I can help others figure out how to work around them.

I think Lion is the buggiest OSX release I've seen since 10.1.

Do you actually expect Apple to test every AVR out there to make sure it's OS compatible with one of their lowest selling machines? Mine wasn't working even with Snow Leopard. Things break with OS upgrades, that should be expected. If there's anything that's critical for you, wait. Jeeeze.

Or, why not plug it directly into the TV?

No I don't expect them to test every Tv but it might be nice if the mini, who's primary video output is HDMI worked with certified HDMI 1.3 sources (which my AVR is).  If it is indeed EDID problems that the hardware fixes then it's Apples problem.  The AVR has a valid EDID or it wouldn't have passed HDMI certification and if removing a forced default in the OS resolves the issue it's certainly ansoftware bug.

After my recent research, EDID issues among computers and AVRs is a common problem with both Windows and Mac OS. Computers may be compliant, but struggle due to their ability to adjust their frequency or resolution. For me, hdmi direct into the TV was worked without an issue. It's when shaking hands with the AVR and then trying to shake hands with the TV that caused problems with both Snow Leopard and Lion. For about a week, Lion was working fine. But we had a power outage and it all went sour again. It was frustrating during a movie when Ihad several people wonder why it doesn't just work. I could have just plugged the hdmi into the TV and then used the optical into my AVR. That worked under every circumstance. But I wanted the ability to have one hdmi from the AVR to the TV and be able to easily swith from Uverse TV, PS3, and my mini. The Pioneer AVR has an pretty cool app for the iPhone/iPad that works under this sceanario. The price of the Gefen product was worth it to me. If you don't want to pay for an EDID dective, why not just plug your hdmi direct into the TV?

Many of us have trouble even when connected the HDMI directly on TV.

What is the solution for all of us?

To return back to snow leopard?

It is at least ridiculous a new operated system to face such kind of problems

with my brand new Samsung LED TV.

So far Venturas, the command seems to work.  I will

see over the next few days whether it is a permanent

fix or not.

The whole point of HDMI is to have a unified

video/audio/control interface!!!!  What ever Apple

did to the code for the Mini in Lion just plain broke it!

Granted, a few folks had issues with Snow Leopard

(me not being one) and now their FIX has broken

the majority of users, including those with brand new

product!  And those with issue NOW, had none with

Snow Leopard!

Apple just plain went against the simple paradigm,

"If it ain't broke, don't fix it"

Thank you, Venturas! it worked for me too on my Philips 50FP9830A/37B.

Venturas, that simple fix seems to have done the

trick so far.  Ran with just the TV on, switched from

my STB to the Mini and still works.

Now, if Apple would release an update to fix the audio

everything would be peachy. 

Same issue here, new mac mini lion and philips tv. I called apple care and they helped me out. I was asked to execute the commands shown below in a terminal window and reboot afterwards while the mac mini was atteched the philips tv

cd /System/Library/Displays/Overrides/DisplayVendorID-410c/

sudo mv DisplayProductID-0  DisplayProductID-0.old

This worked for me and after reboot i was able ti use mynew mac mini running lion with my philips tv using a direct hdmi connection.

I think these commands are the same as shown in the post of Venturas.

Frank