Mouse problems with display port 1.2 in MST (4K display)

So far the workaround which works best for me is to, start up the Macbook open with external screen attached. After you here the booting sound you can close the Macbook screen and work on your external screen.

As long as your Macbook doesn't got to sleep or you restart while its closed, the mouse cursor issue doesn't seem to appear.

Its not a perfect solution but its easier than going back to El Capitan for me.

However so far I found that the GT750M on my Macbook Pro 15" Retina Late 2013 in High Sierra seems not performing proper, especially something like Adobe Premiere CC is painfully slow, which I suppose has something to do that e.g. CUDA drivers are not out yet from Nvidia for High Sierra.

Hi all,

I got Apple's request to confirm the Bug has been solved in High Sierra, I have tested today and so far it is working fine for me. Before confirming it is solved, I would like to get your feedback with this OS version.

BR

@genamariaelena Not resolved in High Sierra. Even latest 10.13.1 Public Beta still experiences that problem. Only work around as in my previous post works for me so far. But once you restart with the notebook closed the problem re-appears.

I just hooked up a new 4k TV to my MacBook Pro to come up with a problem with my mouse being sluggish.

I never dreamed that the problem might be the display, but I discovered that with this Samsung 4k 40" TV that you have to enable Game Mode in the settings, and my sluggish mouse problem is gone.

What is NVRAM?
A small amount of your computer’s memory, called “non-volatile random-access memory” or NVRAM, stores certain settings in a location that OS X can access quickly. The settings that are stored in NVRAM depend on the type of Mac you're using, and the types of devices connected to it.

What is safe mode?
Safe mode (sometimes called safe boot) is a way to start up your Mac so that it performs certain checks, and prevents some software from automatically loading or opening. Starting your Mac in safe mode does the following:
Verifies your startup disk, and attempts to repair directory issues if needed
Loads only required kernel extensions
Prevents Startup Items and Login Items from opening automatically
Disables user-installed fonts
Deletes font caches, Kernel cache and other system cache files
Together, these changes can help resolve or isolate issues related to your startup disk.

Hi,

I've the same problem here, like Pawel with an external DELL UP2414Q connected via DisplayPort 1.2 to a MacBook Pro (Retina, 15-inch, mid 2014) running macOS Sierra 10.12.

I used it all the time with OS X Yosemite and El Capitan with DP 1.2 60Hz. After I'd upgraded to macOS Sierra last week, I faced problems with the mouse. The cursor shape often was not fitting to it's position, for example meaning it was the "normal" arrow shape although it was above the right border of Mail's window, where it has to be the double left-right arrow indicating that the window can be resized. Moving the mouse out of Mail's window (more to the right) ended up with the resize shape some pixels right of the window, where click and hold enabled me to resize the window.

I had these problems with other macOS applications and with Windows 10 running on Parallels. They occured from time to time and they disappeared without changing anything. But for me as a developer the system was useless, because I was no longer able to design GUI elements or simple work with drag and drop.

After I read Pawel's initial message here I switched the DELL display to DP 1.1 two days ago and since then the problem has gone. So there seems to be an issue with Sierra and at least these DELL displays.

Anyone with an idea? Would be great to work with 60 Hz again, because animations are awful in 30 Hz.

Regards, Lars

Same here!

Edit: Not Solved

Think I solved it.. reset the PRAM: Press Option-Cmd-P-R key sequence when rebooting.

Hi alfeel,

the PRAM reset is no help, isn't it? I tried it today, too, and switched the Dell UP2414Q back to DP 1.2, but only a few minutes later I'd the same problem with the mouse again. So, back to DP 1.1 and now everything's fine for a couple of hours.

Still searching for a solution to use DP 1.2 with macOS Sierra and this display…

Regards, Lars

PS: I just have seen your post in the Dell Community Forum. Please keep us update, if someone is answering there.

+1

Same monitor here, same macOs version.

Sometimes when I turn the display off and on (with macOs already up), and switch the resolution to the highest (native 4k) then go back to scaled (I use 2560x1440), the mouse position get fixed, still get some issues with wrong pointer icons, but at least I can work.

I have to do it every time I restart the system.

I'm using an logitech g502 and I did installed it's software, not sure if this has anything to do with it.

I am having the same problem as well. It appears that scaling up the the Highest Space option then back to the desired setting works for a while.

Late 2013 MacBook Pro running Sierra, Dell UP3214Q with DisplayPort 1.2 enabled.

This is clearly a bug in the code some where, please fix it.

Got the exact same Dell UP3214Q, displayport 1.2 enabled running at 4k and resolution 3840x2160 at 60hz, and like the rest of the users here I have problems with the mouse pointer, it can be stuck in a pointer image that doesn't correspond to the action (a text select cursor pointer when I'm hovering a button for example), and when the pointer does change it sometimes jump offsetting itself.