Level 1

4 points

Mini DisplayPort to Dual-Link DVI Adapter creates jumpy mouse cursor

I just got the new Mini DisplayPort to Dual-Link DVI adapter. It works fine visually on my 30 inch Cinema HD display, but now my mouse cursor is jumpy. Every few seconds as I drag my mouse, the cursor jumps 5-10 inches, making it hard and frustrating to use.

I tried swapping out mice (external Microsoft USB mouse, both wired and wireless), downloading a new mouse driver, turning off airport, resetting parameter ram, and powering the cable via a USB port other than the computer, but the problem persists. I don't see this when the computer is plugged into a 24 inch monitor. So either it's the cable or the computer trying to drive 2560x1600.

MacBook Pro (Late 2008), Mac OS X (10.4.5)

Posted on Dec 18, 2008 1:28 PM

103 replies

Jan 21, 2009 8:03 AM in response to krypttic

Kryptic,

Thank you very much for this very usefull tip. It works !
Apple needs to kill this bug, but it is very good to have a solution before.
Again, thank you very much.

Luc.

DMMSU

Level 1

25 points

Jan 21, 2009 12:51 PM in response to krypttic

There is a quicktime update as of today...installing now. hoping this may fix the MDP issues...

krypttic

Level 2

493 points

Jan 21, 2009 1:37 PM in response to DMMSU

The Quicktime update does not fix the jumpy mouse issues. I didn't expect it would. I think we need an OS update for that (since the last OS update is what caused it in the first place).

I wonder if the stuttering HD video was fixed by this though...?

jmayzurk

Level 1

0 points

Jan 24, 2009 4:37 PM in response to Kerem

Yes, I'm having crashing/freezing problems as well.

I have a late-2008 MBP connected to a 30" ACD with the dual-link DVI adapter.

The MBP was stable and happy for two months before connecting the 30" ACD.

Now I have colored streaks and flashes over black areas of the display, mouse cursor jumpiness, and the MBP is freezing a couple of times per day.

EightKM

Level 1

0 points

Jan 26, 2009 2:54 PM in response to reportjeff

I have installed the new patch released today (1/26/2009) which apple has stated helps with the jumpy mouse. I have seen no improvement whatsoever. The problem still exists and I still get the kernel panic every few seconds.

I am not sure what this patch does, but it is a failure for me...

krypttic

Level 2

493 points

Jan 26, 2009 3:28 PM in response to EightKM

FINALLY! My mouse cursor is working normally and the dp events have stopped (except for a single log entry at startup).

jmayzurk

Level 1

0 points

Jan 26, 2009 3:33 PM in response to EightKM

The patch worked for me. My mouse is behaving properly and I have no more 'dp' events in the system log.

I still have the flashing horizontal streaks over dark areas, however.

krypttic

Level 2

493 points

Jan 26, 2009 3:47 PM in response to jmayzurk

Interestingly, the dp events (and cursor jumping) came back the moment I launched an HD movie in Quicktime (I tried the Ice Age trailer others were having frame rate problems with). The movie will now play at 24 fps, but the jerky mouse and dp events return until you quit Quicktime.

Even having Quicktime open with nothing playing will make the cursor jump and dp events return. Seems this was only a partial fix...

EightKM

Level 1

0 points

Jan 26, 2009 4:13 PM in response to jmayzurk

I have these also. I am wondering if my adapter is bad.

EightKM

Level 1

0 points

Jan 26, 2009 4:17 PM in response to krypttic

Your post led me to test a theory. I run iTunes all the time and am constantly getting the "dp event 0x04" message

When I quit iTunes completely the event stops and does not return until I start iTunes again.

Some progress...

krypttic

Level 2

493 points

Jan 26, 2009 8:57 PM in response to EightKM

Confirmed... launching either Quicktime or iTunes will cause the dp events and jumpy cursor to return until the applications are quit. This means other apps will probably cause the problem too.

Sheesh... Nothing like a partial fix.

zec0

Level 1

0 points

Jan 27, 2009 7:55 AM in response to EightKM

sadly nothing is fixed with this update. when changing the graphics card to "high performance" an external apple 30" monitor display is not even recognised. when changing back to "better battery life" the display is recognized sometimes but only renders highly distorted images. tested with two current macbook pros 15" 2.8ghz and two different mini display port to dual link dvi adapters on two different 30" apple cinema displays. apple should recall this adapters!
i already got the adapter replaced two times and also tried various other adapters in the apple store. all are not working!

uarg

Level 1

0 points

Jan 28, 2009 12:28 PM in response to krypttic

je, i confirm this too. the messages and the heavy lag appear only while qt or itunes are running.

the nvidia update did help to a degree, but i find the cursor still isn't running as smooth as with the adapter (and the 30" cd) detatched.. well maybe that's just me.

anyway, i hope apple will take another look at this, it really disturbs the experience :/

GBH

Level 1

73 points

Jan 28, 2009 2:30 PM in response to reportjeff

The only way to get this adapter nonsense fixed is to be heard.
1) Go to: www.apple.com/feedback/macbookpro.html and file a bug report.
2) Send a letter about your unhappiness and the need for a fix to

<Edited by Moderator>

Kerem

Level 1

0 points

Jan 28, 2009 3:15 PM in response to uarg

Looks like the update is pulled out. It is not showing up in my Software Update and also the original link is now taken down:

http://support.apple.com/downloads/NVIDIAGraphics_Update2009

Can still find it at:

http://www.apple.com/downloads/macosx/apple/firmware_hardware/nvidiagraphicsupda te2009.html

I am getting really annoyed by the secrecy Apple has. This is NOT an acceptable customer service. They put an update that half works and then later on silently take it down. No explanations, no warnings, nothing... So should I just use the above link and download the update anyways??? Is there another one coming?? Are they working on the fix???

What is going on????

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Mini DisplayPort to Dual-Link DVI Adapter creates jumpy mouse cursor