First time MorphOS user / intermittent blank screen…

[Christian Johansson]

Sorry for digging up old threads, but i just bought a Mac Mini and i'm having the same issue. The monitor
goes black for some seconds. I also tried using a lower color depth but that didn't seem to help.

I have a Mac Mini 1.42GHz with 32MB Gfxmem (afaik).

I'm using DVI -> HDMI-adapter and i'm using 1920x1200 and also use a KVM (but only for mouse/keyboard) HDMI-cable is connected directly from the DVI->HDMI-adapter of the Mac to the monitor.

It worked fine on VGA here too, but the picture quality was pretty bad, so it's not really usable.

Is there any solution to this problem?

[Christian Johansson]

1st , contrary to what has been suggested before, buying a D_DVI cable won't solve anything that couldn't be solved by buying a single-DVI cable as the 2nd DVI isn't even connected on the MacMini (or any other GFX-card
2nd 1920x1200@60Hz is the absolute maximum a single link DVI can do, so problems with signal losses are to be expected.

3rd the DVI-part of the Mini is prone to complete failure (leaving you with only VGA) but sofar I haven't heard of this bug sneaking up but allways going from 100% working to total failure in an instant.

What you could try:
- Use other adaptor/cable
- reduce used bandwitdh by going a lower res.

I'm also not sure, what your actual setup is.... you write HDMI which suggests a TV, but those are all 16:9 not 16:10 implying 1920x1080 as optimal res.

If it is an actual 16:10 monitor, doesn't it have a DVI input you might want to try (eliminating the need for an adaptor ?

Its connected to a monitor, the DVI is used up by my PC. But i can of course try DVI without the hdmi adapter, but it dont think it will make any difference

[Christian Johansson]

The problem is the Mac minis hardware. I have the same issue with a FullHD screen.

Due the tollerance of the display VGA works better, but DVI turns the display into a flickering hell.

The problem is the build in radeon chip which wasn´t developed for such high resolutions/frequences. I even can reproduce the effect with OSX. When using OSX itis just not that often, as Apple may used some more finetuned values to setup the resolution.

 Geit

OK so its either using lower resolution or VGA then i guess.