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

This was after 10.12.3 update, and this morning still ok.

The only thing i did different with this update was I ran the mac-pixel-clock-patch-V2 for Nvidia cards and intel GPU. This patch makes 4K/3840x2160/UHD/2560x1080/3440x1440 resolutions possible on older macs over both HDMI and DisplayPort. Was it something apple fixed, was it the new nvidia driver or maybe the patch I ran to fix my HDMI tv.

All i know is that the problem would show up 30 seconds after waking from sleep, and it's done the sleep wake cycle at leasts 5 time and I have yet to see the problem.

The patch

https://github.com/floris497/mac-pixel-clock-patch

The problem came back after i restarted the system. The patch did nothing....

Not sure why everything was working fine after the update, sleep did not break the mouse.... it woke and slept 4 to 5 times,

This morning i decided to reboot, and the problem came back....

After a second reboot, everything works again....

so no idea what happened on the previous boot.

as far as 5K screen, i would stay with el-cap. I seem to be the only one who has success with this and it's a bit flakey at best.

Guys, the mouse pointer is NOT a hardware issue. The issue appears on the boundary of the MST split and also it appears to show the "last" pointer so its very likely an issue with some kind of memory allocation issue where the osx gui render engine is caching the pointer and isn't updating it properly for the two screen halves.

I have several monitors hooked up and the cursor is correct on all screens except the right half of my MST display. The mouse pointer icon isn't "updated' each tick, instead it updates when there are mouse events that trigger the icon change.

If the problem isn't happening for you, great, but don't claim this is a hardware issue and try to dismiss this issue as that gives Apple ammo to ignore this critical issue. The rest of us are actually suffering from this problem and I seriously hope it gets resolved as professional graphics / CAD is nearly impossible with this kind of problem.

In 10.12.4 Beta (16E175b) it's still NOT solved...

Looks like this will not be solved. It looks now that Apple will not willingly fix this. Either engineers are not aware of this or it simply doesn't affect too many people to be "significant" enough.

The only hope is that maybe someday other changes might mitigate this issue.

Very sad, as it mainly affects working professionals.

Thats so frustrating to hear, I was hoping it would be fixed in the latest beta. I just submitted a bug report about this but I doubt it will do anything.

Apple says they care about professionals but they really don't!!

Same here

Dell 4K (UP2414Q)

Worked in El Capitain but had the problem in Sierra

Seems like a software bug, where the cursor after exactly 1/2 of the width uses a cached version of the cursor icon. Likely something to do with 4K (and as some suggest 60Hz).

Update -- found a usable fix:

If I set the MacBookPro internal display resolution to 1680x1050, the problem disappears on my Asus PQ321 4K display.

Setting the internal display to 1440x900 immediately triggers the strange behavior again.

It has definitely something to do with DP1.2 (60hz). Try to switch to DP1.0 (30hz) and the problem is gone. That way I was able to work in the last 6 months. Its not the best solution because of the 30hz but it works.

My hopes are waning with every update 😟

System: Macbook Pro (Retina 15", Late 2013) + DELL UP3214Q (4k)

Hi pxlr,

no, unfortunately no changes with 10.12.5.

I switched my Dell UP2414Q back to DPI1.2 and as soon as it was in energy save mode for the first time, the problem reappeared. So back to DPI 1.1.

But you had deleted your post, so it's still existing with your configuration as well, I assume?!

There seems to be nobody interested in that issue at Apple. :-(

Best regards, Lars

Hi,

Problem still on macOS Sierra 10.2.5.

Apple answered back to my bug report on this issue asking for diagnosis info, which I have provided today. Let's see if they keep it alive and progress on troubleshooting and solving it.

10.12.6 - The issue is still Not fixed.

Someone try High Sierra and check this out

It's unfortunately safe to assume that this will not be fixed by Apple. Ever.

Upgraded to MBP 15", mid 2017 - and it exhibits none of these bugs (at least with the right adapter).

Could this be a way of forcing users to upgrade?

the issue is fixed on High Sierra.

My hardware is MacBook Pro 15"Mid 2014w/GT 750M, and Display is DELL UP2414Q.

I try it on High Sierra Public Beta for a few days. but I could not find This Issue.

so if you are going through this problem, try on high sierra PB OR DB. 🙂 and leave a feedback

Problem still occurs in High Sierra occasionally

Using High Sierra Public Beta 8 (17A360a), MacBook Pro 15" Retina Late 2013 with Dell UP2414Q. It got better and occurs less but still somehow comes back randomly.

Also went through the usual steps (clear PR ram etc.) but unfortunately still doesn't seem completely fixed.

Just installed final official High Sierra - still has the problem occasionally as well.

Also on a side note Nvidia has not updated the Cuda and/or Web-Driver so far for High Sierra. Not sure if that would eventually improve this issue or not. Will report back once there is an official driver from Nvidia.