Mac Mini HDMI into AV HDMI Switch - Lose sound when monitor is shutoff

I'd like to use the Mac Mini to listen to internet radio and have the display shutoff. I have the Mini's HDMI output cable connected to Yamaha audio video home theater receiver that acts as a HDMI switch from various HDMI inputs (blue ray player, xbox, and mac mini). A single HDMI output from the av receiver goes to my Samsung flat screen TV.
All works well (I have the system preferences sound option set to hdmi on the Mini) until I shut off the TV. Then the sound that was going to the AV receiver shuts off and the mini switches its sound output back to its internal speaker.
Can't find a way around it. Appreciate an answer if anyone has one.
Reading the booklet that came with the Mini regarding HDMI output, it appears that Apple assumes that cable is going directly to a monitor. I'm wondering if the Mini gets a signal that monitor goes off (via the av receiver) the designers didn't factor the av receiver's capability to continue handling the sound.

When the TV is turned off or disconnected from the Mac, or if you are using an AV Receiver also when the AV Receiver is switched to a different source than the Mac, the result is that the Mac no longer sees a signal on the HDMI interface. The Mac will then deactive the HDMI interface and switch the sound back to the built-in speaker.
The best solution involves spending money, and is to buy a Gefen HDMI Detective+. This learns the signal from the TV and will keep sending it to the Mac even if the TV is turned off, unplugged or the AV Receiver switches the connection.
See http://www.gefen.com/kvm/dproduct.jsp?prod_id=8005

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Can Mac mini boot into 64-bit kernel

http://macperformanceguide.com/SnowLeopard-64bit.html says:
To determine if your Mac has 32-bit or 64-bit firmware, copy/paste the following command into Terminal:
ioreg -l -p IODeviceTree | grep firmware-abi
...output:
| | "firmware-abi" = <EFI64>
As shown above, the firmware-abi has the value EFI64, indicating that my Mac Pro is 64-bit capable. If it reads EFI32, then your Mac cannot be booted into a 64-bit kernel.
...well, my Mac mini displays that EFI64 64-bit info, but when booting with the "64" keys down it nevertheless uses the 32-bit kernel.
So can the Mac mini boot into 64-bit kernel?

What you are missing is that Apple has written into the boot ROM for certain Macs which meet the criteria to not be able to boot with the 64-bit kernel. The Mac mini is not allowed to boot into 64-bit mode by Apple. There is a list of non-pro Macs hard coded into the EFI boot firmware that tells it not to allow these Macs to boot into 64-bit mode. The Mac mini is on the list! Try as you may the Mac mini will not do it without a hack.
If you google this issue you can find a hack to rewrite the boot firmware and allow the mini to boot into 64-bit mode. It can be dangerous to your mini if you make a mistake!
Here is one hack;
http://www.osxbook.com/blog/2009/08/31/is-your-machine-good-enough-for-snow-leop ard-k64/
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Why does my Mac Mini go into a safe boot mode after put to sleep?

Why does my Mac Mini go into a safe boot mode after I put it to sleep?

HI, can you tell us how you know it's Safe Mode?
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http://support.apple.com/kb/HT1455

I just purchased a new mac mini and would like to use my old dell monitor. I tried a HD to VGA adapter converter,it plugs in, but nothing shows on the monitor. Any suggestions? Thanks

I just purchased a new mac mini and would like to use my old dell monitor. I tried a HD to VGA adapter converter,it plugs in, but nothing shows on the monitor. Any suggestions?

What do you mean by "HD to VGA adapter converter"?
Do you mean have an HDMI to VGA adapter connected the the Mini's HDMI port?
Or maybe you plugged n the the included HDMI to DVI adapter and then connected a DVI to DVI adapter?
In either case that will not work since VGA is analog and the Mini's HDMI port is digital only.
You need to purchase a mini displayport to VGA adapter. It plugs into the Mini's Thunderbolt port.
http://store.apple.com/us/product/MB572Z/B/mini-displayport-to-vga-adapter
Make sure you get a name--brand one. I purchased some el cheapo, no-name ones and they did not work

Mac mini, macbook + DVI to HDMI + projector = No soup for you!

This is driving me nuts!!! I have tried 3 different macs, 4 completely different cables/adapters and they all do exactly the same thing.
1. I connect the mac to the DVI to HDMI cable and/or adapter combo, then connect to the projector
2. I get 2-30 seconds of wonderful projector screen usage (it works, picture looks crystal clear)
3. Then POOF! No projector signal, though it appears mac recognizes the projector.
I can repeat from 1 using a different adapter and/or cable and I get exactly the same results, but if I re-use the same cable I used previously, I get no signal at all.
What the $%@! is going on here??? Is Apple black-listing my cables or something??? I'm using everything from cheap-o cables to $$$ cables with exactly the same result.I run this projector with absolutely no problem from a dell desktop via DVI to HDMI.
For what it's worth, I'm connecting to a LG HS201 projector.
using Core-2-duo macs either with pure DVI or mini-DVI

samberl wrote:
DVI to HMDI is not supported on the Core 2 Duo Mac Mini.
You need to connect via DVI or VGA to your projector.
I have had Core2Duo Mac minis working with Sony LCD TVs and a Toshiba Plasma via DVI to HDMI cables with no problems. Obviously audio has to be run separately. There have been many reports from others that this works. It should do since both DVI and HDMI support HDCP and both are digital video connections, this after all is why a simple DVI to HDMI cable works.
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Since in your case the common factor is your projector and not the computer or cables it might be it at fault. Early HDMI products did have HDCP handshaking problems.
People have been using Mac minis as media center computer with HDMI for ages since the Mac mini is small and quiet, this probably goes back as far as G4 models let alone Core2Duo models.

Mac Mini does not display HDMI 1080i in full screen on TVs

I have a 1.66 GHz Intel Core Duo Mac Mini that I am having problems getting video to display 1920 x 1080 @60hz in full screen on my Sony XBR 1080p HDTV. The Mac is connected to the TV via a DVI to HDMI cable. The Mac recognizes the display as a "Sony TV"
When the Mac first starts up the entire TV screen is filled with the grey Apple startup screen, but when the Mac fully boots and gets to the desktop, the screen has shrunk so that it is slightly off the screen on the left, and has about 80% of the screen filled horizontally and about 90% vertically. I have tried all combinations of the overscan selection on the Mac and on the TV, but they make the image about 120% of the size of the screen so the top, bottom and sides are cut off.
I have tried 2 different 1080p HDTVs with the Mac Mini and get the same results for both TVs.
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Thanks for the ideas.
I did as you suggested, but the only 1920x1080 selection shown was one for "NTSC" which I would think is interlaced. This was after a reboot. All of available resolutions are labeled with "NTSC". When I look at the screen resolutions on my MacBook Pro when it is connected to the TV, they are labeled as "Interlaced". On both computers there are no progressive scan selections.
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If there was a less aggressive Overscan mode or more aggressive normal mode, that would fix the issue.
Any other ideas on how to adjust this?

Mac mini not displaying on HDMI monitor

Well, I have a Mid-2011 mac mini, and I have this monitor problem. While my thunderbolt moniter always works, (with a VGA adapter) my HDMI port hardly ever works. I have dual monitors, one HDMI and one VGA. They are both the same exact monitor (Dell Monitors) which both have VGA and HDMI ports. One is using the HDMI and one is using VGA. The HDMI one is all ste up, and has worked in the past, but it is currently not working at all right now. The VGA one always works, but the HDMI one switches on and off and either works at some point, then after a computer resart, it refuses to work. I belive its my computer that is refusing ti regognize it or something. Any hints help!

I do not have a solution for you.....but as to the suggested resets.....so you will know the intent....
support.apple.com/kb/HT1379
support.apple.com/kb/HT3964

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If the monitor is not working, the keyboard and mouse
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Toshiba 32" 32C120U
Display Resolution: 1366x768 (720p)
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sounds like an awesome setup. Unfortunately, only one of my two monitors has an HDMI input. Also, even when hooking up just the one with HDMI to my Mac mini, it still displays "no signal" and I have two different converters I've tried. Perhaps it's just not meant to be. I will have to settle with DVI connections for both monitors...not the end of the world. I shouldn't complain.
Thanks for the quick answer and advise.

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I'd just like to jump in on this thread to report exactly the same problem.
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