Question:

Question: Dell U4919DW / MacBook pro 5k issue

Hi,


I have just purchased the Dell U4919DW monitor to use with my early 2018 MacBook Pro 13", but unfortunately I cannot choose full resolution 5120x1440 in the settings, max is 3840x1080. I have tried the app SwitchResX to manually set the 5k resolution without luck, only scaled.


From this link I read about my MacBook before purchasing the screen that:

"this model supports a maximum resolution up to 4096x2304 at 60 Hz at millions of colors on two external displays or a single external display at a maximum resolution up to 5120x2880 at 60 Hz at over a billion colors via Thunderbolt 3 (USB-C)."

MacBook Pro "Core i5" 3.1 13" Touch/Mid-2017 Specs (Mid-2017 13" (Touch Bar), MPXV2LL/A*, MacBookPro14,2, A1706, 3163): …


My MacBook Pro has 4 USB-C ports, I'm using the left ones which operate at full speed (right ones are reduced).


Why can't I get full 5k resolution? Is it an issue with the MacBook, the connection, the screen or perhaps an iOS issue?


Additional links with information on the screen:

https://www.dell.com/support/article/dk/da/dkdhs1/sln314416/dell-u4919dw-system- requirements-and-supported-configuration…

https://www.dell.com/support/article/us/en/19/sln314339/dell-u4919dw-monitor-usa ge-and-troubleshooting-guide?lang=en#Usi…

https://www.dell.com/en-us/shop/dell-ultrasharp-49-curved-monitor-u4919dw/apd/21 0-arnw/monitors-monitor-accessories

MacBook Pro TouchBar and Touch ID, iOS 12.1

Posted on

Reply
Question marked as Solved
Answer:
Answer:

I wonder if you have to turn off the Mac's native display. Did you try that? It may only be able to do the higher resolution if it's the only display.

Posted on

Question marked as Helpful

Nov 26, 2018 11:08 PM in response to kanonendk In response to kanonendk

I too have this dilemma but instead with my 2018 Mac Mini.


I'm currently using the bundled USB-C cable and I'm only seeing 3840 x 1080


I've since ordered a Thunderbolt 3 cable and will test this out when it arrives (26.11.2018) and update back on here again. I'm hoping it will give me full resolution!

Question marked as Helpful

Nov 26, 2018 11:08 PM in response to kanonendk In response to kanonendk

So, the Thunderbolt to Thunderbolt cable didn't work .... in fact nothing displayed on the monitor at all!


I suspect that as the monitor only supports USB-C and not Thunderbolt 3 - it didn't detect the signal from the Mac.


I'm waiting on a Thunderbolt 3 to DisplayPort cable to arrive this evening too, I suspect this will finally solve the issue so I will update again once that arrives!

There’s more to the conversation

Read all replies

Nov 24, 2018 5:17 AM in response to kanonendk In response to kanonendk

I've been following this post, waiting to hear whether anyone has an answer. I'd like to purchase the monitor (it's on sale today), and was wondering whether you've been able to resolve the problem on your own, or if it's just not going to be compatible with a Mac. Any updates?

Nov 24, 2018 5:17 AM

Reply Helpful (1)

Nov 24, 2018 7:09 AM in response to marino389 In response to marino389

I always close the lid, which guess turns of the built-in display?


I will however try these first 2 procedures Monday when I return to my office:

3 Ways to Turn Off The Screen of Your MacBook Without Closing The Lid [OS X Tips] | Cult of Mac

Nov 24, 2018 7:09 AM

Reply Helpful

Nov 24, 2018 9:52 AM in response to kanonendk In response to kanonendk

There is no requirement to turn off the internal display. The hardware for the Internal and the Hardware for the External are completely separate.


The fundamental problem is likely the adapter you are using. Most adapters will not work for this case at full resolution. This one appears to do the job, and is cheaper than most that almost work:



Moshi USB-C to DisplayPort Cable --$49.95


.

Nov 24, 2018 9:52 AM

Reply Helpful (1)
Question marked as Helpful

Nov 26, 2018 11:08 PM in response to kanonendk In response to kanonendk

I too have this dilemma but instead with my 2018 Mac Mini.


I'm currently using the bundled USB-C cable and I'm only seeing 3840 x 1080


I've since ordered a Thunderbolt 3 cable and will test this out when it arrives (26.11.2018) and update back on here again. I'm hoping it will give me full resolution!

Nov 26, 2018 11:08 PM

Reply Helpful (2)
Question marked as Helpful

Nov 26, 2018 11:08 PM in response to kanonendk In response to kanonendk

So, the Thunderbolt to Thunderbolt cable didn't work .... in fact nothing displayed on the monitor at all!


I suspect that as the monitor only supports USB-C and not Thunderbolt 3 - it didn't detect the signal from the Mac.


I'm waiting on a Thunderbolt 3 to DisplayPort cable to arrive this evening too, I suspect this will finally solve the issue so I will update again once that arrives!

Nov 26, 2018 11:08 PM

Reply Helpful (1)

Nov 27, 2018 8:10 AM in response to MrADeveci In response to MrADeveci

The fundamental problem is likely the adapter you are using. Most adapters will not work for this case at full resolution. This one appears to do the job, and is cheaper than most that almost work:



Moshi USB-C to DisplayPort Cable --$49.95


.

Nov 27, 2018 8:10 AM

Reply Helpful

Nov 27, 2018 8:43 AM in response to Grant Bennet-Alder In response to Grant Bennet-Alder

According to this website, every connection type should produce full resolution with the exception of HDMI 1.4...


User uploaded file


Odd that nothing is working. Someone marked this thread as "Resolved." Since it hasn't been resolved, we might benefit from "Unresolving" it. Might generate more discussion from the community.


Also curious to know whether it is an Apple problem or a Dell problem. I talked to both and they said that it "should" work. Has anyone called Apple or Dell support and had them walk through step-by-step?

Nov 27, 2018 8:43 AM

Reply Helpful

Nov 27, 2018 9:04 AM in response to marino389 In response to marino389

I have seen ads for many such adapters that claim the adapter supports up to "4K" 3840 by 2160.


Only the Mooshi adapter above seems store support more. There many be others, but they are few and far between.

Nov 27, 2018 9:04 AM

Reply Helpful

Nov 27, 2018 9:07 AM in response to Grant Bennet-Alder In response to Grant Bennet-Alder

But shouldn't the USB-C cable that comes with the monitor, or the USB-C cable that came with the MacBook Pro be sufficient? Seems odd that you would need an adapter when you can plug right into the monitor directly with their own supplied cable.

Nov 27, 2018 9:07 AM

Reply Helpful

Nov 27, 2018 9:17 AM in response to marino389 In response to marino389

according to Dell's information, the USB-C input is the "poor cousin" of the other inputs:

Input Connectors

2 x HDMI 2.0 (HDCP 2.2) (10-bit color @ 60Hz)
1 x DP 1.4 (HDCP 2.2) (10-bit color @ 60Hz)
5 x USB 3.0 Downstream port
2 x USB 3.0 Upstream port
1 x USB Type-C (Alternate mode with DP1.4, Power Delivery, and USB2.0) (8-bit color @ 60Hz)

note, for example it supports 8-bit color while the other inputs support 10 bit color.


Dell UltraSharp 49 Curved Monitor: U4919DW | Dell United States

.

Nov 27, 2018 9:17 AM

Reply Helpful

Nov 27, 2018 10:03 AM in response to Grant Bennet-Alder In response to Grant Bennet-Alder

Odd. My monitor hasn't arrived yet, so I'll have to wait to troubleshoot. If anyone else tries that Moshi cable, let us know if it solves the problem.


It kinda defeats the purpose of the USB-C though, having power and data through a single cable.

Nov 27, 2018 10:03 AM

Reply Helpful (1)
User profile for user: kanonendk

Question: Dell U4919DW / MacBook pro 5k issue