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periodic Dual-link display problem with new adapter

I don't yet know what conditions cause it but I'll be working with my MacBook Pro connected to my 30" display when the screen "shifts" and then becomes practically unreadable. I have to disconnect the adapter and reattach it. The photos below show a detail of the problem and then how it looks after reconnecting the adapter.

User uploaded file

Here are two movies showing the problem.
http://www.plate.net/dvidualinkadapterproblem/MVI_2327.mov
http://www.plate.net/dvidualinkadapterproblem/MVI_2328.mov


I have not yet called Apple, but has anyone else seem reports of this?

MacBook Pro, Mac OS X (10.5.6), Disclaimer: I benefit financially from any purchase you make from Automatic Duck

Posted on Dec 23, 2008 8:42 AM

Reply
228 replies

Dec 26, 2008 7:24 AM in response to Rob Meyer

I have a similar issue. Mine is a 30" Apple display. I have a 'flicker' every-so-often. Maybe once every 15 minutes? Hour? The display disappears then immediately back - less than 10 frames. Certainly tolerable, but not the best. I have shifted to powering via an external USB power brick - makes no difference. Sounds like a critical timing error. But I'm seeing it on an all-apple set up which may give some hints for other displays.

Dec 26, 2008 4:46 PM in response to Rob Meyer

I'm having exactly the same issue, horizontally shifted lines and then static if I power cycle the screen. The noise is very similar to the flickering, too. Essentially, every other vertical line is static, rather than picture. Seems pretty intermittent, and not related to activity or heat. Interestingly, sometimes the screen "flickers" a little and doesn't get distorted. Sometimes it does. Its extremely annoying, because unplugging the adapter causes open windows to change suze and location.

I plan on contacting Apple about the issue soon, has anyone else had any luck?

Dec 27, 2008 3:30 AM in response to Hypher

That´s it, i´m officially canceling my pre-order for the dual-dvi cable. This is ridiculous. I´ll accept the fact that Apple screwed up and that I can´t get my 30" working with this macbook pro.

I´m surprised they can get away with this kind of behavior. They took away my matte screen, and made sure I couldn´t even use my 30" matte screen. Thanks Steve.

Dec 29, 2008 12:43 PM in response to joet3ch

Here is a data point for you. I do not see any distortion and have used the adapter for about 40+ hours with a new MBP 15" and 6+ hours with a new MBA. this is with a 30" ACD. Here is my setup. Powered USB hub->ACD 30"->Dual Link MDP Adapter->Powerbook MDP. So either some adapters are bad or as some others are posting it might have to do with the usb hub (especially powered ones). If you have a 30" ACD then you might try going through the monitors usb ports first and from monitor to adapter.

Dec 29, 2008 12:51 PM in response to Type_11

Thanks for the suggestion. Although I am using a Dell 3007WFP-HC display.

I did try both the usb ports on the macbook pro as well as a powered usb hub and the usb ports on the monitor itself, all with the same results.

I put a call into Apple support and the issue is being escalated to engineering. I suggest anyone else with this issue to call also.

periodic Dual-link display problem with new adapter

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