Mini Displayport to Dual-Link DVI not working?
I have just received my Mini Displayport to Dual Link DVI Adapter. The good: After I cancelled my initial order, because it delayed my notebook, I reordered last week and got it within 5 days or so (despite the store displaying 2-3 weeks). I was positively surprised to see it featuring a USB repeater. I plugged it in and it seemed to work instantly I also encountered no jumpy mouse whatsoever. I tried with a Dell 30" screen (3007WFP).
The Bad: The dvi connector is pretty bad and unstable, you can also not use the screws on the dvi cable to the monitor to fix the plug to the adapter. They also didn't recreate the analog video signals on the dvi connector, so no luck in trying to use the adapter with an old dvi to vga adapter (I was sort of expecting that, but given they have all kinds of circuitry in the box anyway, there was a tiny quantum of hope).
The Ugly: A few minutes later the problem surfaced: The picture became somehow distorted, it looks as if the Dual Link connection is losing a link, meaning that every second pixel or so is missing on screen. But the symptoms can also include shadows etc. I tried a few things:
* Cycling the monitor power has no effect
* It makes no difference if the adapter gets power via the Macbook Pro USB ports, a powered hub, a usb ac adapter etc.
* It makes no difference if there is something plugged into the adapter USB repeater or not.
* The problem seems to be occuring later if the main display is folded down and only the 30" screen is connected
* Re-plugging the connection DVI side fixes the problems sometimes.
* Re-plugging the Mini Displayport side connection either fixes the problem, or kills the connection forever, requiring complete adapter removal and redetection of the main display (sleep, function key etc.).
Over time, the problem surfaces 100%, typically after a few minutes. Funny enough, sometimes it vanishes by itself.
Does anyone have a similar problem? Or is my adapter defective? Any suggestions towards a fix? Any help is appreciated. I am cursing the day someone decided to replace the old dvi connector.
Regards,
TB
The Bad: The dvi connector is pretty bad and unstable, you can also not use the screws on the dvi cable to the monitor to fix the plug to the adapter. They also didn't recreate the analog video signals on the dvi connector, so no luck in trying to use the adapter with an old dvi to vga adapter (I was sort of expecting that, but given they have all kinds of circuitry in the box anyway, there was a tiny quantum of hope).
The Ugly: A few minutes later the problem surfaced: The picture became somehow distorted, it looks as if the Dual Link connection is losing a link, meaning that every second pixel or so is missing on screen. But the symptoms can also include shadows etc. I tried a few things:
* Cycling the monitor power has no effect
* It makes no difference if the adapter gets power via the Macbook Pro USB ports, a powered hub, a usb ac adapter etc.
* It makes no difference if there is something plugged into the adapter USB repeater or not.
* The problem seems to be occuring later if the main display is folded down and only the 30" screen is connected
* Re-plugging the connection DVI side fixes the problems sometimes.
* Re-plugging the Mini Displayport side connection either fixes the problem, or kills the connection forever, requiring complete adapter removal and redetection of the main display (sleep, function key etc.).
Over time, the problem surfaces 100%, typically after a few minutes. Funny enough, sometimes it vanishes by itself.
Does anyone have a similar problem? Or is my adapter defective? Any suggestions towards a fix? Any help is appreciated. I am cursing the day someone decided to replace the old dvi connector.
Regards,
TB
Macbook Pro, Mac OS X (10.5.6)
