Dell U4919DW / MacBook pro 5k issue

The MacBook Air has Intel graphics (pre Ice Lake) so it won't support display timing widths greater than 4K wide in macOS. If it supports 5K in Windows, then you should complain that macOS should allow the same.

If you're a developer then there's the Feedback Assistant.

https://feedbackassistant.apple.com/welcome

If you're not a developer then you can use the Feedback Assistant to provide feedback on public beta versions.

https://developer.apple.com/bug-reporting/

The public beta for 10.15.4 hasn't started yet. I think the developer beta has started.

I stated early-on in this discussion that the Hardware (I was thinking display-generator Hardware) was completely separate for the separate displays. Thats is basically true, but the RAM used for screen buffers is Not separate, it is shared.

There is an interesting discussion that has been going on for five months concerning the 16-in MacBook Pro 2019. It is up to about 114 pages at this writing.

Rrecently, some new information came forward:

• The interface you choose is EXTREMELY important. HDMI requires the Mac to reproduce the "heartbeat" refresh -- a row-by-row sending of the display data with very strict timing requirements, and just in time to be displayed properly. And it must be sent every interval -- 60 times a second. Being late causes that row to be blanked, which may cause flickering. At 5120 x 1440 at 60Hz, that is a LOT of data.

So use DisplayPort family (or USB-C). Don't even consider HDMI.

• if another display using a heartbeat refresh is connected at the same time, it may cause so much additional strain on memory timing that your Mac cannot maintain this resolution.

(the built-in display is a heartbeat refresh display.)

So DO try the experiment of using Closed Clamshell mode. You may get dramatically different results.

Use your Mac notebook computer in closed-display mode with an external display - Apple Support

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Go to https://support.apple.com/en_US/specs

Type the names of the Macs you want to compare.

The only Macs that will support > 4096 width with a single DisplayPort output (not LG UltraFine 5K or iMac 5K Retina display) with Intel graphics are the ones that support 6K.

That means:

"Intel Iris Plus Graphics 645" (8th gen CPU; I think the tier is called "GT3e") = No

MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)

"Intel Iris Plus Graphics" (10th gen CPU with Gen11 graphics; If Apple wanted to be more specific, they could have added "G7" for the tier.) = Yes

MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)

MacBook Air (Retina, 13-inch, 2020)

I've spent most of the day speaking with the senior technical team over the phone explaining (again) that both my work and personal 13" Macbook Pros (2017 (purchased in 2019) and 2018 model) are not showing the option to drive the U4919DW at 5120-by-1440 (but instead only get shown 3840-by-1080) resolution.

I called the support team 2 days ago and today they came back with an initial response: that the technical specification at: https://support.apple.com/kb/SP754?locale=en_GB is not accurate and indeed the only way to support the resolution (5120-by-1440) would be to use an external GPU. The current intel graphics is not able to support the required resolution (which you folks have already mentioned in this thread).

AND they will update the technical specification page in due course to make it clear!

I iterated the fact that this would mean that I have been mis-old a product based on the product description (see https://www.apple.com/uk/legal/statutory-warranty/) "The goods will match the description given of them." and based on UK Consumer Law, Apple should either refund me or provide a product the meets the outlined technical specification.

So now my case will get escalated (again) and I will be notified in 48/72 hours! Let's see what happens.

For higher resolution of 5120 x 1440 with the Dell U4919DW use a Mac with a non-Intel discrete graphics card (NVIDIA or AMD), if not you will get a display resolution 3840 x 1080 on the display monitor. Check under system configuration on the Dell Support page "note for Mac Users": https://www.dell.com/support/article/en-ng/sln314416/dell-u4919dw-system-requirements-and-supported-configuration?lang=en

You can compare the Apple non Intel MacBook Pros here: https://support.apple.com/en-us/HT201805 with the Dell recommendations: https://www.dell.com/support/article/en-ng/sln314416/dell-u4919dw-system-requirements-and-supported-configuration?lang=en

Even though the tech specs for a MacBook Pro say 5120-by-2880 resolution at 60Hz: https://support.apple.com/kb/SP754?locale=en_IE this is quite specific as well at the resolution of 5120 x 1440 for the Dell Monitor.

The System Information.app shows the following information:

Intel UHD Graphics 617:

  Chipsatz-Modell:	Intel UHD Graphics 617
  Typ:	GPU
  Bus:	Integriert
  VRAM (dynamisch, maximal):	1536 MB
  Hersteller:	Intel
  Geräte-ID:	0x87c0
  Versions-ID:	0x0002
  Metal:	Unterstützt, Funktionsset macOS GPUFamily2 v1
  Displays:
Farb-LCD:
  Displaytyp:	Integriertes Retina-LCD-Display
  Auflösung:	2560 x 1600 Retina
  Framepuffertiefe:	30-Bit Farbe (ARGB2101010)
  Synchronisierung:	Aus
  Eingeschaltet:	Ja
  Helligkeit automatisch anpassen:	Ja
  Verbindungstyp:	Intern
Dell U4919DW:
  Auflösung:	5120 x 1440
  UI sieht aus wie:	5120 x 1440 @ 60 Hz
  Framepuffertiefe:	30-Bit Farbe (ARGB2101010)
  Display-Seriennummer:	8FFZWP2     
  Hauptdisplay:	Ja
  Synchronisierung:	Aus
  Eingeschaltet:	Ja
  Rotation:	Unterstützt
  Helligkeit automatisch anpassen:	Ja
  Verbindungstyp:	Thunderbolt/DisplayPort

And the AGDCDiagnose is attached to this post.

Mister_Highping wrote:

Hopefully this is the right info you need:

https://discussions.apple.com/content/attachment/b7e42a89-5ff5-4b5f-94db-dc305702bfea

The output of the log stream doesn't bring any information.

The SwitchResX output looks good.

For log stream, you type it in Terminal.app, turn off the display, press Command-K to clear the Terminal.app, then connect the display, and when you see an image, select all, then copy and paste into a new plain text file.

I wonder if I need to override my display's EDID to match your Dell to get the 5120x1440 mode working? Nope, that doesn't seem to work - my display shows up as U4919DW instead of XV273K and has a 3840x1080 timing, but not 5120x1440. Maybe it works for Intel UHD Graphics 617 but not Intel UHD Graphics 630?

Here is the output of the terminal logging:

Are you already using Big Sur and don't have the default resolution or are you trying to achieve it with Catalina? Maybe they wrote new Intel drivers for it?

I think you should be using the DisplayPort input, based on this item under specs:

Scanning Frequency

DP1.4 : 5120x1440@60Hz (FRC)

HDMI2.0/USB-C : 3840x1080@60Hz (FRC) 2560x1440@60Hz (FRC)

To me, that says you only get the highest resolution over ONE input using DisplayPort 1.4 input.

Apple sells such a cable, rated for 5K

https://www.apple.com/shop/product/HLR62ZM/A/moshi-usb-c-to-displayport-cable

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Yvon, here is a simple and better solution to the issue you are describing.

1. Connect your iMac 2018 to your ultra-wide monitor using 2 cables: 1 USB C, and 1 HDMI. Your iMac will now recognize your single UW monitor as dual monitors at 2560x1440 each.
2. Run your Mac in extended desktop mode, and enable PBP mode on your UW Monitor.

You now have full 5120px x 1440 resolution on your iMac 2018. No eGPU required.

Like you I was mad to discover that I couldn't do this in single-monitor mode but you know what? Using it in extended desktop mode is actually better. Programs like Magnet work perfectly in this setup. I can reduce the resolution only on one side of the screen if I need to. And if I need to share my screen with a client via Skype for example, sharing only one side of my screen is an absolute requirement because if I shared the entire screen, my clients would not be able to read any of the text it on their comparatively small monitor. (Let's face it - not too many people have 49" Ultra-wide monitors at the moment).

I realize the dual desktop mode is not perfect, but you know what? It's perfect for me. It works so well that now I don't think I would even use single-monitor mode even if Apple fixed the issue.

As for not buying Apple products anymore because of this one issue, come on. You know that Apple's products and support is by far the best. If you want proof, try calling Dell and explaining this problem to them. You'll be lucky if you get anyone half as knowledgeable about this as Apple is.

Anyway: I freakin' LOVE my new iMac 2018 and Dell 49" Dual Monitor setup. It replaced my hot and noisy dual iMac 27's. Everything is super-fast, super-clean, super quiet, and lets face it, cool AF.

Cheers & good luck!

Hi guys, I recently bought the Philips 499P9H and experience the same issues described here: no full 5120x1440 resolution.

My setup:

• MacBook Pro (Retina, 13-inch, Mid 2014)
• Philips 499P9H

I downloaded a older program called "ResXtreme" which allowed me to select 5120x1440 as resolution for the monitor. But side note: it looks blurry...

On the Apple website I found the following (sorry if it's said already).

Macbook Pro 15":

Simultaneously supports full native resolution on the built-in display at millions of colors and:

• Up to two displays with 5120-by-2880 resolution at 60Hz at over a billion colors
• Up to four displays with 4096-by-2304 resolution at 60Hz at over a billion colors

Macbook Pro 13":

Simultaneously supports full native resolution on the built-in display at millions of colors and:

• One display with 5120-by-2880 resolution at 60Hz at over a billion colors
• Up to two displays with 4096-by-2304 resolution at 60Hz at millions of colors
• Up to two displays with 3840-by-2160 resolution at 60Hz at over a billion colors

Macbook Pro 13" (mid 2014):

*This model supports a simultaneous maximum resolution up to 2560x1600 on two external displays via Thunderbolt. Alternately, it can support a single display up to 2560x1600 via Thunderbolt and a single 1080p display at up to 60 Hz, 3840x2160 at 30 Hz, or 4096x2160 at 24 Hz via HDMI.

It's understandable that it does not work on my 13" 2014 model. But I however can do PBP with 2560x1440 twice using HDMI.

Not understandable is that it does not work on the 15" 2017 model.

That card isn't supported by the display U4919DW. These AMD cards are supported:

• AMD Radeon RX 580
• AMD Radeon RX 570
• AMD Radeon Pro WX9100
• AMD FirePro W9100
• AMD FirePro W7170M
• AMD FirePro W4100
• AMD Radeon R7
• AMD Radeon R9

https://www.dell.com/support/article/us/en/04/sln314416/dell-u4919dw-system-requirements-and-supported-configuration?lang=en

Can you see the specification page for the LG?

@JeanLuc7 You have 2 statements there that sound really funny, given this conversation is on page 31, full of comments from people who are upset:

• "have come to terms with the problem"
• "Noboy expects Apple to acutally fix the problem"

@Everybody who disagrees: Best action is to call apple support and tell them of this problem

Hi,

I am thinking about buying a LG 49BL95C-W 49" to use with my MacBooks.  I have a 2019 13" MacBook Pro (for work), a 2017 13" Pro and a 2016 12" MacBook, all with Intel graphics.  My goal is to get the max resolution 5120x1440 over a single USB-C cable while charging the laptops.

I read the thread carefully and there seem to be two different issues ongoing.  Is this a correct summary?

1. For Mac's with AMD Radeon discrete graphics: 5120x144 worked prior to 10.15.0 and was fixed after 10.15.2.  joevt's EDID script was to fix this issue in 10.15; however that is no longer needed for the LG since 10.15.2. The monitor works perfectly (5120x1440) out of the box for AMD Radeon Macs.
2. For Macs with integrated Intel Iris graphics card: there is NO solution or workaround, even in 10.15.5 beta -- except to install Windows with Bootcamp or use 2 monitors with Picture-by-Picture with 2 cables.

How does 2 monitors picture-by-picture work for you?  At first I thought 2 "monitors" would defeat the purpose, but it may not be that bad after I thought about it.  Can you stretch apps seamlessly across "monitors" and have it work well?  There is no physical bezel but is there a virtual one?  Windows has a bit of "resistance" to move your monitors across screens.  Plus, going full screen with 2 "monitors" may be even better since YouTube, Zoom, etc only takes up half the display, albeit on left and right (not center), but they won't waste space on the left and right with bars.  On PC, I am used to working with 4x 27" monitors and I actually prefer having a different app full screen on each monitor. I am used to content not being centered.  It also seems good for sharing your screen on Zoom since you can share half of what you see, while keep your private notes open on the other "screen", and not force top/bottom letterboxing for your viewers.  Anything I am missing any downsides about PbP except 2 cables?