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~ 😝

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208 replies

R.Beck

Level 1

4 points

Nov 21, 2016 10:21 PM in response to flo.riano

SOLUTION HERE:

Unplug screen connector (In my case mini-dp to HDMI) on the mini-dp end and plug it in again.

I personally use both bluetooth keyboard and trackpad, running OSX Sierra on a MacBook Air early 2015.

This solved the cursor lag after sleep.

Note: The cursor lag is both for the onboard AND external trackpad.

flo.riano Author

Level 1

14 points

Oct 26, 2013 6:55 AM in response to flo.riano

Also the update to Mavericks on my Macbook Air did not fix the issue. I had to reapply the fix for using RGB instead of YPbPr, but the mouse still hangs...

It would be great to hear if other users with a Macbook Air (13", with Intel HD 5000 Graphics) and a Dell U2913WM have similar issues or if it works. A brief reply stating what MBA model and what Dell monitor you have and whether your mouse cursor runs smooth or not would be highly appreciated.

Corey888

Level 1

0 points

Oct 27, 2013 12:03 AM in response to flo.riano

I'm having the same exact issues and I did the same fix that you did as well. Solved the issue with forcing RGB but I'm still experiencing the mouse lag/skipping.

I have a brand new MacBook Air (mid 2013) 13" with an i7 and Intel HD 5000. The monitor I'm running is a Dell 2713H.

Updating Mavericks lead me to forcing the RGB on again but same as you the mouse lag still stayed.

Kraasa

Level 1

5 points

Nov 3, 2013 7:10 AM in response to flo.riano

Hi all, I have the same problem when I connect my Philips 272P monitor (27" (2560x1440) via cable display port - no reduction - minidisplayport <> displayport) to my new Macbook Pro 13" with retina display (currently available), the mouse cursor lags at regular intervals during movement. Mouse cursor skip all the time when the monitor is connected.

flo.riano Author

Level 1

14 points

Nov 16, 2013 1:26 AM in response to hongkongs

@hongkongs:

Great job of finding out that Eizo monitors have similar problems - to me it seems ironical that small brands (like Eizo, which I have never heart about before) are working hard to fix these problems whereas huge enterprises like Dell or Apple do not even acknowledge that there is a problem.

Have you found out how one can reproduce the problem? If so, we could provide a proper bug report to Apple (including a video showing the issue) so they can not simply ignore it.

Nov 22, 2013 12:13 AM in response to hongkongs

Hi, yes its the new late 2013 Retina MBP, 13", Connected to Dell U2713H monitor.

Sorry I dont want to install Windows/Bootcamp on my new Mac, but I have another PC to test with, that never show the problem.

Does entering the Monitors menus and moving around remove the issue temporarily for you guys too?

JTChris

Level 1

0 points

Nov 22, 2013 12:41 PM in response to Tore Fornes

The toggling the Display port option is not working for me.

I dont understand anyway why should it help.

The display didnt find a connection with a display port since the mac is connected to the monitor through the DVI port.

Nov 25, 2013 11:23 AM in response to flo.riano

I'm having exactly the same problem. MBA 2011. Dell U2311. Apple isn't going to do anything. I saw the same issue brought up in a post dating four years. Still nothings been done.

Oh I should add: this problem only began today and my external dell monitor isn't even turning on. So i get mouse lag when it's connected and no external display.

Dec 5, 2013 6:39 PM in response to flo.riano

Same issue:

Late 2013 Macbook Pro Retina

Nvidia GPU

OS X 10.9 (13A3017)

When attached to my HP lp2480zx monitor via displayport, the mouse has a big jump/lag every second or so.

The sleep suggestion didn't work for me.

FWIW, I also had the "crappy quality on external monitor" problem and did the EDID override to force RGB color space...

Wow. Two serious problems just trying to hook up an external monitor for the first time? Not good. I guess I won't hold my breath for a fix either, judging by all the prior posts.

flo.riano Author

Level 1

14 points

Dec 11, 2013 9:13 AM in response to DNeuwir

The problem with the unsharp image is very likely due to the RGB YPBPR issue - the monitor should be recognised as RGB, but when being recognised as YPBPR the image is unsharp.

See this thread for a discussion about that: http://embdev.net/topic/284710

Dec 24, 2013 9:17 AM in response to espenandre

I have exactly the same problem as described above with......

Mac Mini 2012 Late
Processor 2,3 GHz Intel Core i7
Memory 4 GB 1600 MHz DDR3
Graphics Intel HD Graphics 4000 1024 MB
Software OS X 10.9 (13A603)

connected to a brand new

Dell U2713H display
with a Mini DisplayPort to DisplayPort cable
and resolution 2560x1440

I have mouse Lags! anyone solved the problem?

JovanRS

Level 1

4 points

Dec 26, 2013 5:55 AM in response to stream777

I have tried to capture video with iphone but camera cannot capture it... white trail of mouse pointer is mostly visible on light gray (top of e.g. safari window)... there is no visible trail on builtin display on macbook...

I have connected MBP 15 2012 with discrete GPU... it doesn't have mouse lag problem... but it also have mouse trail on my u2713H...

same Dell cable... miniDP to DP was used

JovanRS

Level 1

4 points

Dec 26, 2013 4:16 PM in response to JovanRS

Here is more on "mouse trail" http://en.community.dell.com/support-forums/peripherals/f/3529/t/19513238.aspx

It is called RTC overdrive and it looks like there is no option in Dell menu to disable this "feature"...

anyway, this is not related to problem that mouse start to lag just after waking up MBP with HD5000 from sleep ...I could live with RTC but wakeup problem with mac is a real problem (I do not want to go to menu to disable/enable DP 1.2 each time my macbook wakes...)

daerid

Level 1

8 points

Jan 11, 2014 7:34 PM in response to flo.riano

Exact same issue here. Late 2013 13" Retina MBP, external monitor is Dell U3014 connected with a Mini DisplayPort to DisplayPort cable.

Mouse lags until I enter the monitor menu. I have a couple DP-DualDVI adapters lying around here, will give that a shot.

keftm

Level 1

0 points

Jan 24, 2014 5:51 AM in response to flo.riano

I have the same issue. Mouse lags and gets useless when I plug in a external display.

Computer:

MaBook Pro Retina 15-inch, Late 2013

16 GB

OS X 10.9.1

External display:

Hp LP2465

Connection:

HDMI port to DVI port with adapter

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Mouse cursor lags with external monitor