Level 1

14 points

Mouse cursor lags with external monitor

hello,

i have just purchased a dell u2913wm monitor with a native resolution of 2560x1080. when connected to my macbook air (with mountain lion) using a mini displayport cable my cursor starts lagging on both screens. basically, when i move the mouse along a line on my desk the cursor results in a very erratic trajectory. this occurs when using a usb mouse and with the integrated trackpad. if the monitor is turned off or unplugged the mouse is smooth again. .

a similar problem was reported a few years ago but somehow the thread is just archived ( https://discussions.apple.com/thread/1965949?start=0&tstart=0 ).

also, i had trouble with the monitor that osx recognised it as ypbpr, so i had to force it to treat it as rgb device, because otherwise the image was unsharp.

on my macbook (mid 2010) running mavericks the cursor is smooth, so the monitor and the cable are apparently not faulty.

MacBook Air, OS X Mountain Lion (10.8.5)

Posted on Oct 24, 2013 12:23 PM

Top-ranking reply

hongkongs

Level 1

0 points

Posted on Nov 15, 2013 1:18 PM

I have the same config. 2013 11" Air 8G i7 HD5000 iGPU connected to

a Dell U2913WM over displayport since Sep.

The mouse skip every few seconds. and I was lucky enough to discover the same method as

flo.riano (switch between the "displayport 1.2" in the monitor's settings) so I can using my system *_^

I ask apple about the problem but haven't receive any response.

A few things to note:

1.If connect the monitor to my AIR using DVI converter have no problem.

2.I didn't force EDID to use RGB mode b4 I discover the switching trick. So it shouldn't be related

to the RGB mode issue.

3.It work on my machine if it's running bootcamp with Win7. So the Windows driver is ok.

So most probably a problem with the display system/driver in OSX.

4.My colleague's 2012 mac air connect to my monitor(Displayport) just fine.

5.A PC using ATI 7970 connect via display port have no problem too.

6.Although I believe a display driver update should fix the problem. I also notice EIZO release a firmware for

one of their monitor which seems to have the same problem. So it should be fixable with a monitor firmware update as well.

http://www.eizo.com/global/support/compatibility/fw1_01/index.html

7.This problem appear on different model of monitor from different manufactures, So it's not a problem

with paticular manufacture's problem

If anyone from apple is reading this, please put this in the bug list.

THIS IS A REAL BUG/ISSUE and not some isolated compatibility problem.

Goodluck to us~ 😝

View in context

208 replies

Apr 18, 2014 2:35 PM in response to lordeagle

2560 full and clear.
HDMI 1.4 support up to 4k resolution, though I'm using a standard hdmi cable ))

hugh2323

Level 1

0 points

Apr 22, 2014 3:33 AM in response to Alex Coderbit

Hi Alex,

Can you let us know the exact details of the HDMI adapter you are using, I wish to get one (as I am sure others do to).

Cheers,

Lloyd

May 2, 2014 4:17 PM in response to jairojunior

When mouse works, keyboard (apple wireless keyboard) gets laggy.

May 4, 2014 10:45 AM in response to flo.riano

I've install (13D45a), And we're not suppost to discuss about it.

so let me put it this way, It makes me happy~ ^_*

mrf088

Level 1

0 points

May 15, 2014 10:53 AM in response to mrf088

Update: This issue seems to have been corrected with the most recent MacOS update. :-)

Sandak

Level 1

0 points

Jul 9, 2014 6:40 AM in response to James Sinnott

Yes! You are right, in this situation the monitor is frozen

Jul 9, 2014 6:52 AM in response to Sandak

Thanks for testing that! Sounds like you have exactly the same issue as me.

When did this problem start for you? I'm pretty sure I only starting seeing issues after installing 10.9.4 a few days ago.

Jul 9, 2014 7:03 AM in response to Sandak

Maybe Apple fixed your first issue in 10.9.4 but also caused the new issue!!

Thanks for your replies, it's useful to know someone else has the same issue.

Sandak

Level 1

0 points

Jul 9, 2014 7:49 AM in response to James Sinnott

Yes, that is very likely..

Anyway I hope that Apple will fix this bug soon. I don't want to wait for Yosemite and hope that everything will be working flawlessly..

Jul 9, 2014 7:53 AM in response to Sandak

I have reported the issue to Apple using this page:

https://www.apple.com/feedback/macosx.html

Hopefully someone will take it seriously!

Sep 28, 2014 11:29 PM in response to flo.riano

I do have the same problem. Reported twice, no response from Apple. I really hope it will be fixed as I bought the 13 inches for that purpose.

Nov 3, 2014 7:45 PM in response to flo.riano

Same issue for me:

MBPR 13 (Late 2012)

External Monitor: Dell 2713H

Mouse: Razer Death Adder with Synapse 2.0 installed.

Attached using Display port.

Nov 11, 2014 1:46 AM in response to Akira Lee

Same problem for me.

2014 Macbook Air I7, 8Gb RAM connected by Thunderbolt to 2014 iMac i5 using Logitech T631 bluetooth mouse

Dec 12, 2014 11:56 AM in response to zomby

This is one of those things that, like iTunes Home Sharing, will never be fixed (or, it seems, even acknowledged).

Jan 4, 2015 5:54 AM in response to flo.riano

Just bought a Macbook Pro 15' Intel Irish medio 2014 and connected 2* external 27' monitors. Both screens gives laggy cursor.

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Mouse cursor lags with external monitor