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Mouse skipping problem when external display connnected

I recently purchased a Macbook, and I connect it to a Dell 3008 display using the mini DisplayPort to dual-link DVI adaptor. My issue is that when the Dell is connected and in use, the mouse pointer skips across the screen when I move it, like something is interrupting the input for a very brief period, and it's being interpolated wrongly when the input comes back.

The problem doesn't occur when the external display is disconnected, and it happens with wired USB, wireless USB and wireless Bluetooth mice.

No adjustment of mouse sensitivity options seems to fix it, and the interruption in the pointer movement seems to happen at semi regular intervals of between 5 and 10 seconds apart, although I can't be 100% sure.

Interestingly, it doesn't happen when I connect a lower resolution external display using the same adaptor. So it only happens at 2560x1600. I'm wondering if it's a problem with a hardware accelerated mouse cursor and the NVIDIA graphics driver.

Anyway, it's a real barrier to me using the Macbook, so hopefully someone has a solution.

Thanks!

2.0GHz 13" Aluminium Macbook, Mac OS X (10.5.6), Mini DisplayPort to dual-link DVI adaptor, bluetooth Mighty Mouse

Posted on Apr 5, 2009 6:07 AM

48 replies

Mar 21, 2010 12:27 PM in response to macguyver9er

"Solution (for macbook) finally found! I was using my macbook in clamshell mode with BT mouse/keyboard combo + samsung lcdtv via Hdmi and experiencing massive mouse lag with my bluetooth mouse. The only thing that works is to leave the lid to the macbook OPEN and withount any obstuctions in front of the mouse. I set my mac to never sleep and have not had any lag for weeks...ah, so nice. I hope it works for all."

Works for me too! Thanks a lot. I have a MBP so it's either something common in the hardware or more likely an os thing specific to the clam shell mode. Hope they fix it soon.

Message was edited by: clyde_barrow

Mar 29, 2010 10:24 AM in response to clyde_barrow

Finally!leaving the lid open actually solves the issue though you also have to keep the macbook close to you most of the time. I think it has to do with the antenna or something of the sort. Thanks guys for the solution.

Mar 31, 2010 2:16 PM in response to Community User

Wow. I had struggled with this problem since buying my 27" iMac last month. I've tried changing my keyboard and using various mice (even going wired to no avail) and -- finally -- found this thread. Disconnecting my second monitor fixed the issue.

I really hope Apple is working on a fix to this problem.

Mouse skipping problem when external display connnected