Dell U4919DW / MacBook pro 5k issue

@BayhanNL, I would be interested to know how your friend connected his 2015 macbook via HDMI.

I have a 2015 MacBook Pro too

Retina, 15-inch, Mid 2015

2.5 GHz Intel Core i7

AMD Radeon R9 M370X 2048 MB + Intel Iris Pro 1536 MB

I have the same issue with the U4919DW. The maximum resolution I am getting is 3840x1080.

The only way to get 5120x1440 is to connect to "2" monitors via 2 cables (Minidisplay to HDMI, and HDMI to HDMI).

This is far from ideal.

@ericfromb1

another shocking news appeared.

he has even MacBook Pro (Retina, 15-inch, Late 2013), he just said that "what you need is Macbook with discrete GPU".

we just connected single HDMI cable, that's it.

Edited: he added "I have NVIDIA GeForce GT 750M"

As I stated before in my posts, the issue is not in the "discrete GPU", the problem is in Intel's Iris drivers.

At this point I'm just fed up with this situation. I won't be getting a new Mac or display and I'll just continue with my 2011 27" iMac and that's it.

Good job Apple, way to go.

Don Luca, are you saying that if I get the Macbook Pro 15" 2018 (with Radeon Pro 560X) and connect to the Dell monitor it won't get full resolution? Someone here sent a picture showing that it works, right?

I was on the verge of getting a new Mac Mini + Dell u4919DW monitor but was waiting for this issue to be resolved.

Since it seems there's no interest on Apple/Intel part of solving this, I'll send my money elsewhere.

I got lucky and worked at native resolution for me. However I am finding the font size too small. I can drop the resolution by half and it looks crisp. If I drop to 3840x it is all very blurry.

Any idea how to get the proper retina scaling like the 5k lg monitor (more space less space options)

Any help would be appreciated

Thanks

All, same issue here. I have the monitor connected with both a USB-C and HDMI cable in order to give me the full resolution via dual display (using the PBP feature of the monitor).

I have it connected to a Mac mini (2018).

Quick question for those of you with similar setups. Does the monitor sleep correctly. I can't get it to sleep and when the Mac sleeps the monitor displays the following message:

"No USB Type-C signal from your device" and it just doesn't sleep.

Slightly off-topic but I'm guessing the people with any potential answer are readings this.

Thanks!

I have one of the first 5K retina iMacs (not the black Pro model) and connected it to the Dell monitor with a Thunderbolt to Displayport cable. The Mac recognizes the proper native resolution, but the image on the Dell is horribly distorted. If I revert back to 3840x1080 (what everyone here is complaining about), it's fine. Perhaps your graphics card in the iMac pro is better. It really just comes down to what Graphics card people have as to whether this monitor will work natively or not. For instance I have an older MacBook Pro 15 from early 2013 and it can drive the monitor just fine. My latest MacBook Pro, Touch Bar, 13in 2018 CANNOT. Very frustrating. I actually blame Dell and ALL of the reviewers on Youtube for wasting my time with this monitor. Were they not realizing the resolution was non-native? Were they using special Macs and never noticed 80% of the Mac population would not get the goodness of this screen? Sheesh.

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!

Well, let's be honest in all reality. Apple should fix this... If the same 13" Macbook is able to run it's internal screen and the 5120x1440 external screen when using bootcamp, then the hardware is not to blame.

We are all experimenting with software like ResXtreme, SwitchResX and possible other to solve some problems which leads me (as a developer also) to even think more that it is a software/OS issue. Come on Apple, help us out!

The DELL popup menu includes an info page where you can see the transmitted resolution. With the mini and the crappy 5120x1440 resolution from SwitchResX, it tells me that I am still transferring 3840x2160. The Mini does the upscaling internally. For me, only the PBP solution worked. I did not try PBP without SwitchResX - did not want to risk to lose my working solution by changing a running system from the monitor preferences.

It is a Mac driver issue, not a DELL firmware issue. The same monitor works flawlessly with the MacBook Pro 15" series and with eGPUs. However, it does not work properly with the MBP 13" (with internal Intel GPU only) and the 2018 Mac Mini with the same GPU as in the MBPs.

However, the monitor works perfect with the same machines running Windows 10 on Bootcamp.

Apple should just solve it.

I checked on Catalina and there's a new mtdd file that doesn't exist in Mojave.

DisplayVendorID-1e6d/DisplayProductID-5b74.mtdd

I'm not sure if this is related to these screens not, and I don't yet have one so I can't try it, but I thought I'd pass this along in case it helps anyone.

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

<key>display</key>

<dict>

<key>backendtiming</key>

<string>2560x2880@60</string>

<key>frontendtiming</key>

<string>5120x2880@60</string>

<key>linkmode</key>

<string>multi-cable</string>

<key>overlay</key>

<data>AP///////wAebXRbAAAAAAAAAQS1PCJ4IAAAAAAAAAAAAAAAAAABAQEBAQEBAQEBAQEBAQEBAAAAEAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAA/ABMRyBVbHRyYUZpbmUKAAAAEAAAAAAAAAAAAAAAAAAAAXhwEnkAAAMAFIBuAYT/E58AL4AfAD8LUQACAAQAKQAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACSkA==</data>

<key>streamcount</key>

<integer>2</integer>

<key>tileinfo</key>

<string>(2,1)</string>

</dict>

<key>productid</key>

<string>0x5b74</string>

<key>serial</key>

<integer>1</integer>

<key>vendorid</key>

<string>0x1e6d</string>

<key>version</key>

<string>1.3</string>

</dict>

</plist>

My MacBook), 15.2 is a MacBook Pro (13-inch, 2018, Four Thunderbolt 3 Ports, Intel Iris Plus Graphics 655 1536 MB

I received the LG 49WL95C -W which looks to be identical to the Dell (just my opinion I don't know for sure). I ordered this over the Dell as there seemed to be reviews on Amazon indicating that it worked at full resolution on MacBookPros.

It would not run at 5120x1440 with the supplied cable (USB C). I spoke with what seemed to be a knowledgeable Apple support guy. He reported that the only 5K monitor they support is the LG sold on the Apple site.

This was purchased to replace that one so no joy.

What I have gathered from here and elsewhere is that simply is no driver in Mojave, that the graphic card is capable when booted into Windows and thus that Apple has not provided us a means to run these monitors.

Perhaps they will enable this functionality in Catalina but Apple will not comment.

Hg

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?