Dell U4919DW / MacBook pro 5k issue

If the MacBook Pro (13-inch, 2018, Four Thunderbolt 3 Ports) is just a slower CPU than MacBook Pro (13-inch, 2019, Four Thunderbolt 3 Ports), then the Big Sur beta might fix your problem. If it does, post your setup info and screenshot at

https://forums.macrumors.com/threads/intel-graphics-and-5120x1440-testing-in-big-sur.2244174/

Hi

I have a MacBook Pro 2018 13" 4-port Thunderbolt 3 and a Samsung C49RG9 display, with a native resolution of 5120x1440.

I read everything I could on google but I don't have a solution. I'm on the Beta 4 from Big Sur, and I tried an HDMI to USB C and single HDMI cable with an adapter. I got a completely overwritten image with the HDMI to USB C cable and a 3840x1080 image with the adapter. But no 5120x1440.

I ordered a Displayport 1.4 (8k at 60Hz) to USB C cable, I haven't tried it yet, hopefully I'll get a miracle.

Have you had feedback from people who got the native resolution with only one cable?

Thank you!

The cables you want for HDMI-only Monitors (higher resolutions than HD TV sets) are marked as Certified with an anti-counterfeiting tag and are labeled:

"Premium High Speed HDMI cable" or that + "with Ethernet" --OR--

"Ultra High Speed HDMI cable" or that + "48G"

Cables with No Certification tags are good for your standard TV set, and not much more.

2016 is Skylake. Apple only added SST 5K timing capability in Big Sur for Kaby Lake and Coffee Lake.

Ice Lake is new and gets 5K from the beginning because it supports DisplayPort 1.4 and DSC which allows for 6K or more.

Go to https://forums.macrumors.com/threads/intel-graphics-and-5120x1440-testing-in-big-sur.2244174/ and post the results of the information collection commands in Big Sur

kextstat | grep Intel | egrep "Graphics|Framebuffer"
ioreg -lw0 | grep "AAPL,ig-platform-id"
ioreg -lw0 | grep '<"Mac'
system_profiler SPHardwareDataType SPDisplaysDataType | sed '/.*Serial.*/d;/.*UUID.*/d'
system_profiler SPSoftwareDataType | grep System

I wonder how difficult it would be to try to get the Kaby Lake graphics drivers to work with the Sky Lake CPU... I don't know what all the differences are. I suppose one could look at Linux graphics drivers... Or maybe the changes to the Kaby Lake driver between Catalina and Big Sur could be applied to the Skylake driver (or the differences between Skylake and Kaby Lake in Big Sur).

I can confirm that updating to Big Sir fixes this frustrating issue. Man this is such a relief.

My current setup:

Monitor Samsung CRG9 49"

MacBook Pro 13-inch 2017

Processor 3.5 GHz Dual-Core Intel Core i7

Memory 16GB

Graphics Intel Iris Plus Graphics 650 1536 MB

I just got an adapter for the CRG9 and it works great (just a standard USB-C to DisplayPort 1.4). However, I went to connect my 2560x1440 monitor to the other thunderbolt port on my MacBook using a dongle and it works! For about 10 seconds, it then puts the MacBook to sleep making my displays go to sleep too. Any suggestions?

<< MBP 13" 2017 >>

that has 7th generation Kaby Lake processor, and IS expected to support displays wider than 4096 wide (only under Big Sur) when connecting with a single data cable.

Use DisplayPort.

HDMI at high resolutions is extremely trouble-prone.

I've just tried DisplayPort and the USB-C input at the same time from the Mac Mini - same result.

Mac sees it as two displays but does nothing else.

Each "half" of the screen is getting 2560x1440 separately - so yes, full 5120x2880 resolution when the screens are considered together.

I just want to chime in and confirm I also have this issue. A bit disappointed since it took almost a month for the monitor to be delivered. I hope it's fixed soon!

JimmyWillis-

Looks beautiful.

Exactly what make & Model cable are you using for this?

And you appear to be Mirroring displays, is that correct?

What GPU in your 15in?

Yup exactly. Used the cable that came with the Blackmagic and the Dell cable.

And if it is a Macbook Pro which model please? 13” or 15”? And the specifications?

Ok, got this monitor today and it also doesn't work with a mac mini in native resolution. I'll buy now an eGPU