scho

macrumors newbie
Original poster
Jun 24, 2020
6
3
I own a new MacBook 16" with a Radeon Pro 5500M 8 GB. I use it with 2 LG 27UK850/27UL850, one is rotated by 90°.
I use the second from the left scaled option.

On my 90° rotated display, I observed a very strange behavior, that makes the bottom ~15% unusable. When I move the mouse cursor vertically into that area, it disappears at some point and then comes back at the same spot it disappears, even though I kept moving my cursor down. All mouse clicks are triggered on the position, the cursor should be though in this bottom area. So basically, you can't use the mouse there.

In order to show exactly, what's going on, I recorded it using Mac OS X Screen Recorder (aka "Bildschirmfoto"). The strange thing is though, that the recording does not show the described behavior, the cursor never disappears and is always position correctly. So I recorded the screen using my phone.

Has anyone observed a similar behavior?
 

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Dhock_Holiday

macrumors regular
Sep 17, 2019
188
170
Can you try to boot into safe mode and see if you can replicate this behavior? It might be a bug in macOS with external displays that are rotated, if you can please file a bug report with Apple so they can fix the issue in upcoming releases.
 
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scho

macrumors newbie
Original poster
Jun 24, 2020
6
3
Can you try to boot into safe mode and see if you can replicate this behavior? It might be a bug in macOS with external displays that are rotated, if you can please file a bug report with Apple so they can fix the issue in upcoming releases.
Thanks for your input. Safe Mode won't allow to rotate the external display, so I can't replicate it there.
Where's the best place to report a bug with Apple?
 
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scho

macrumors newbie
Original poster
Jun 24, 2020
6
3
I've submitted a bug at feedbackassistant.apple.com.

As a workaround, I tried to rotate the display by 90° (instead of 270° as before). This just moves the problem from the bottom to the right.
 
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kiwi45

macrumors newbie
Jul 26, 2010
8
6
I have the exact same issue. When rotated 90° the cursor disappears somewhere on the right side, and near the bottom when rotated 270°. However if the display is set to native resolution or default for display there is no issue. Very strange.
 
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bmir

macrumors newbie
Aug 13, 2017
6
0
>> I have the exact same issue. When rotated 90° the cursor disappears somewhere on the right side, and near the bottom when rotated 270°. However if the display is set to native resolution or default for display there is no issue. Very strange.

Exactly same issue. 16in 2019 MBP 5500M 8gb connected to LG 4k monitor (horizontal) + Dell U2720Q (vertical). Problem occurs on the dell, rotated 90 degrees.

Interestingly the problem disappears if I open the laptop lid and add the native panel into the configuration.
 
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aruiz8

macrumors newbie
Sep 18, 2020
2
2
Chiming in a bit late here, but I just got an MBP 16" 5500M & I have the same issue.

I'm using a 32" 4K Acer monitor (ET322QK) rotated to 180° (mounted upside down). My cursor disappears when it enters the right 2" or bottom 2" of the screen and clicks register waaaay off mark, like a good 1/2".

The issue does not persist when scaling is set to normal, regardless of rotation.

The issue does not persist when scaling is increased and rotation is standard.

The issue does persist when scaling is increased and rotation is 90°, 180°, or 270°.

Any luck with this one? Is Apple working on a fix??
 
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aruiz8

macrumors newbie
Sep 18, 2020
2
2
Hello again, everyone. I just chatted with a Technical Advisor at Apple and they were pretty interested in the issue. They got me on the phone with someone who requested that I send them a video of the issue happening, which I did.

Hopefully they'll get back to me soon. When they do, I'll be sure to post an update here.
 
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badtzmaru56

macrumors newbie
Jul 23, 2013
2
3
Just another post to also confirm the same issue here.

2019 MBP 16" 5500M with an LG 27UL850 monitor rotated at 90°.

The dead spots are the top + bottom right corners.

No dead spots for default, when alt+clicking "Scaled", the only resolution that works apart from the default (1080 x 1920) is 1152 x 2048 and 2160 x 3840. Everything in-between has dead spots.
 
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slekvak

macrumors newbie
Oct 9, 2020
2
1
Same here (originally posted in own thread):

I have a strange issue with my MacBook Pro (2019) with two external monitors attached (1xHDMI 4K + 1xUSB-C 4K). On one of the monitors (portrait mode, USB-C), the mouse cursors disappears (but "travels") when crossing a specific vertical "line" along the right edge, and on the right side of that "line", it is off by some pixels, making it hard to hit buttons.

The monitor works fine with my Windows computer. Anyone seen similar issues?

GIF: https://gfycat.com/joyousbackgiantschnauzer
 
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hherman

macrumors newbie
Oct 19, 2020
1
0
I HAVE THIS EXACT ISSUE! So frustrating! Was so excited to get my new monitor just to discover this massive flaw? Really unacceptable from Apple. Has anyone had any luck? I submitted a report to the feedback assistant but they've ignored all my reports in the past.
 
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victorlugo

macrumors newbie
Oct 22, 2020
1
1
Think I figured it out... I have a 4K monitor portrait rotated (270 deg), and I was having issues with the mouse clicks being offset at the bottom of the screen. While gathering specs to post on this thread, from "System Report -> Graphics/Displays", I noticed the reported resolution was way off from my actual 4K resolution: 3600 x 6400. So I instantly got the idea that this was a bug with UI scaling.

I went to System Preferences -> Displays, my resolution was set to "Scaled" and under that are 5 boxes, from "Larger Text" on the leftmost, to "More Space" on the rightmost. While having the problem, I was set to the 4th box, the one before the last. When I set the box all the way to the end, "More Space", my display and UI went into true 4K resolution, and the offset problems were gone. Reopening System Report showed a much more sensical number, 2160 x 3840 (4k, backwards, since it's portrait). But for many people, this means the text is too small.

So while it's not a fix for those who need scaling, the point is that it pinpoints the problem, so we might get some attention to this matter.

I didn't check each scaling option, but I am assuming any scaled option (other than Most Space) in Portrait mode is going to be affected by this bug.

Confirmations of the same behavior might help. I am including some specs below.

------------------------

Newer monitor with USB-C port, directly connected to Macbook Pro 16" with USB-C to USB-C cable.

To shorten this post I've placed screenshots and System Information within Spolers.

Scaled - 4th box, one from More Space
DELL U4320Q:
Resolution: 3600 x 6400
UI Looks like: 1800 x 3200 @ 60 Hz
Main Display: Yes
Rotation: 270
Connection Type: Thunderbolt/DisplayPort
Television: Yes

Screenshot (System Preferences) 2020-10-22 at 05.11.41.png
Screenshot (System Information) 2020-10-22 at 05.14.52.png

Scaled - 5th (last) box, More Space
DELL U4320Q:
Resolution: 2160 x 3840
UI Looks like: 2160 x 3840 @ 60 Hz
Main Display: Yes
Rotation: 270
Connection Type: Thunderbolt/DisplayPort
Television: Yes

Screenshot (System Preferences) 2020-10-22 at 04.39.03.png

------------------------

10.15.7 (19H2)
MacBook Pro (16-inch, 2019)
2.3 GHz 8-Core Intel Core i9
16 GB 2667 MHz DDR4
AMD Radeon Pro 5500M 4 GB
Intel UHD Graphics 630 1536 MB
 
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marsa

macrumors newbie
Oct 26, 2020
1
1
Same issue here:
MBP 16" (2019), if the 4K (LG 27UN83) monitor is rotated mode and not at "default" or "more space", there is a weird offset on one site and you cannot click buttons with the mouse.
It's super annoying.
Does anyone have ticket number at Apple that I can reference when complaining? I'd like to upvote this issue.
 
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calebroseland

macrumors newbie
Aug 19, 2012
2
1
@iLitHiuMi none of the latest Catalina updates fixed this for me, neither did upgrading to Big Sur.

Using an iPad as a Sidecar display magically solves this cursor problem for me very reliably. It's crazy, but it works.
 
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_pants

macrumors newbie
Nov 17, 2020
1
0
Same issue here too:
MBP 16" (2019), 5500M 8GB, eGPU RX5700XT, 2x BenQ PD2700U.
with one rotated 90 degrees, I get the same issue down the entire right side of the display (about 4cm for the right)

As @calebroseland suggested, if I use my iPad as a Sidecar display. The issue goes away.
 
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GustavPicora

macrumors member
Jan 22, 2010
75
3
OMG I thought it was me getting crazy. All what was already mentioned above applies. I need the screen scaled to 1440X2560 (or whatever it is) because standard res simply is not wide enought to display web content properly, neither XCode doc
 
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GustavPicora

macrumors member
Jan 22, 2010
75
3
HA found the solution.. at least for me...
So I have a Benq sw271 as main display, a Dell 2415 with 90 degrees rotation to the left of the benq and the laptop MBP 15'' behind that dell display. I have an egpu connected to the computer and from the egpu I connect both displays. I connected the benq as well via usb-c to the computer so I have access the usb-hub and sd reader on the benq display.
In the moment I connect the benq via usb-c, macOS thinks/detect the benq as another monitor and adds it to the arrangement. When I leave this 3rd "display" to the left of the dell (in the arrangement), then the problem appears. If I move that 3rd "display" to the right of the main display (Benq connected via eGPU), then the problem is gone.
Only thing is that macOS still thinks that the benq connected via usb-c as well, is another display and the mouse would be able to move off screen (main) to that "display". which is ok for me as its on the far right and I don't move the mouse that much in that area.

I hope it helps.

[EDIT:] Seems still the disappearing persist. Only solution is connect the display usb hub via the SS-USB connector and not via USB-C
 
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royhp

macrumors newbie
Nov 29, 2020
3
1
Same problem here with a 2020 iMac 27-inch and Radeon 5700 in MacOS Big Sur 11.0.1. The issue occurs on an LG 27uk850 (2560x1440), and was not occurring with the same monitor setup when using my 2018 15" MacBook Pro.

The monitor has this dead zone on the right side where the mouse cursor disappears and reappears but then interactions are offset by a large margin (1.5 inches or so). The mouse clicks do not register where the mouse appears to be. This only occurs when the display is rotated in MacOS 90/270 degrees and when the display is not at default scaling (1080p) or native scaling (4k). I too have noticed that the display shows an incorrect resolution in the system reports of 2880x5120 when at a scaling value in between default (1080p) and native (4k).

So far the only thing that fixes it for me, other than running the display at default (1080p) or native (4k) scaling is to us my iPad as a Sidecar display. This allows me to use any scaling value with the rotated monitor and the dead zone/offset issue goes away.
 
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royhp

macrumors newbie
Nov 29, 2020
3
1
Also, it seems as though this issue is only affecting those of us with AMD RDNA GPU's such as the 5500M, 5700, 5700XT etc.

I determined this from reading the other posts as well as speaking from my own experience where this did not happen on my 2018 15" MBP with Radeon Pro 560X using the exact same monitors and configuration.
 
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topherdobe

macrumors newbie
Jan 8, 2021
3
0
I have the exact same problem with my 16-inch 2019 macbook pro.


AMD Radeon Pro 5500M:

Chipset Model: AMD Radeon Pro 5500M
Type: GPU
Bus: PCIe
PCIe Lane Width: x8
VRAM (Total): 4 GB
Vendor: AMD (0x1002)
Device ID: 0x7340
Revision ID: 0x0040
ROM Revision: 113-D3220E-190
VBIOS Version: 113-D32206U1-020
Option ROM Version: 113-D32206U1-020
EFI Driver Version: 01.A1.190
Automatic Graphics Switching: Supported
gMux Version: 5.0.0
Metal Family: Supported, Metal GPUFamily macOS 2
Displays:


DELL U3219Q:
Resolution: 2880 x 5120
UI Looks like: 1440 x 2560 @ 60.00Hz
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Display Serial Number: 6D2J413
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: 90
Automatically Adjust Brightness: Yes
Connection Type: Thunderbolt/DisplayPort


DELL U3219Q:
Resolution: 2880 x 5120
UI Looks like: 1440 x 2560 @ 60.00Hz
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Mirror: Off
Online: Yes
Rotation: 90
Automatically Adjust Brightness: Yes
Connection Type: Thunderbolt/DisplayPort

Spent an hour on the phone with Dell and Apple, Dell basically said "it's not our problem, call Apple". Apple said "Call dell". I never experienced this with my 2015 MBP. It is definitely a graphics card issue with the newer models. The only solution is to use the native resolution without scaling, ie live with tiny text on the monitor.
 
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topherdobe

macrumors newbie
Jan 8, 2021
3
0
Same issue here:
MBP 16" (2019), if the 4K (LG 27UN83) monitor is rotated mode and not at "default" or "more space", there is a weird offset on one site and you cannot click buttons with the mouse.
It's super annoying.
Does anyone have ticket number at Apple that I can reference when complaining? I'd like to upvote this issue.

You can reference case ID 101291378089.
 
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bmir

macrumors newbie
Aug 13, 2017
6
0
I submitted a video demo through the support site a while back, didn't hear anything.
 
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