MacBook Pro M3 Pro with Samsung Odyssey G9 OLED Smart

<<. Grant: Club 3D CAC-1557. >>

that cable/adapter, at 1.8 meters of USB-C cable before the conversion electronics, is too long for top performance. It should have no more than ONE meter USB-C section.

devj_it--

Your postings have appeared on the Apple User-to-User Support Communities.

This is a great resource for getting and sharing ideas with other Users, but there is no there Apple following or Apple auditing of what is posted here. Apple is NOT working on a fix, and will not be unless/until you deliberately let them know there is a problem.

The level of documentation required for for Engineers to take this up is surprisingly large and complete. You need to provide enough information so that, if they had comparable equipment on hand, they could reproduce the issue in their labs.

If reproducing this issue requires this EXACT equipment, they would throw this back to you as "third party equipment defect, not an Apple Problem".

You should also consider pursing these issues with the display-maker.

Official Apple Support

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The typical limitation is that Dell docks do not tend to support high-end displays at full resolution on a Mac.

You are dealing with data rates that are faster and more un-relenting than any other signals in your Mac except the path processor to RAM memory. Any less than top-performing items in the chain will yield less-that-top resolutions.

Please specify EXACTLY how the connection goes from your Mac (what cable, how long) to the Dell dock (what Model Dell dock, what cable, how long) to the display.

I got my G9 OLED today and I am experiencing same issues as above: With HDMI 2.1 the highest option I get is 3840x2160 60hz which is very wrong as the display doesn’t even support x2160. Even when I choose 3840x1440 it still won’t go higher than 60hz. However when I try my dp-usb C cable I get the expected values 5120x1440 with 240hz and even HDR, BUT with the flickering.

My HDMI cable is a Nördic Certified Ultra High Speed HDMI 2.1 48gbps and I have confirmed there’s nothing wrong with it by trying it on different monitors and computers. In fact I used it with the same macbook on my previous Samsung G9 Neo monitor and was able to get 5120x1440p 120hz HDR (still surprised it didn’t go as high as 240hz since I now get it with a usb c to dp cable which has less bandwidth)

That computer fully supports HDMI 2.1, so it could run 8K at 60 Hz or 4K at 240 Hz.

Many users are using non-certified cables that can not perform at those data rates. when this happens, the Mac drops the data rate by reducing the top resolution available. But your complaint was Flickering.

A complex display like yours may have several internal (inside the display) settings for different use-cases, eg magazine cover photos, Video editing, gaming, ordinary desktop work.

It may also have several different refresh rates supported, and the Mac and the display must be in agreement, or the display may go blank when expected screen data does not appear in time. Variable refresh rate in the Mac when the display is expecting a specific fixed refresh rate are an example of how this can work against you.

Well, I wish I would have found this before I bought the new G9! The previous version worked so well until the line of pixels appeared. I am using a 2024 MacBook Pro with the M3 Max. Hoped updating the software would work but no love. Currently running Sonoma 14.4.1. I have tried HDMI and a HDMI to Display cable but it looks like ****. Tried Better Display (and paid the $18 to unlock all the features) still nothing.

Interestingly, I did connect to the monitor via AirPlay which filled half the screen. That allowed me to use the HDMI for the other half. I would call that a win but the AirPlay side is very pixelated. The HDMI half gets recognized as 2560 x 1440.

I even tried connecting the USB-C to the MacBook and the PC input on the back and still nothing! The USB-C to USB-C did not even register on the Samsung!

Considering returning the monitor if this group doesn't have any good ideas?

Thank you! The picture-by-picture worked with the HDMI plugged directly into the Mac and the HDMI to DP plugged into a USBC to HDMI adapter.

Sinderellaz

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what cables, adapters and docks are you using to make this connection?

I have the same problem with my macbook m3 max, resolution on my samsung g9 49' is broken and I can set it only to 3840 x 2160 which looks low and weird, also 60hz is best i can do. I have no idea why its like that since its working on my second laptop with windows

I attempted using BetterDisplay and the latest cable supporting up to 8K resolution (DisplayPort 1.4 to Thunderbolt 4), but it failed to work. Despite everything functioning correctly a month ago, I cannot recall any changes made since then. I haven't adjusted any settings or installed new applications during this period.

<<. (DisplayPort 1.4 to Thunderbolt 4). >>

what cable is that, exactly? Both Thunderbolt and DisplayPort have limited lengths for maximum display data speeds.

how long is the ThunderBolt portion of the cable before the adapter circuitry? how long is the portion of the cable between the adapter circuitry and the display?

Additional information for the thread:

I am using the slightly older Samsung Odyssey 49in G9 5120x1440 @ 240hz which I bought in when the Macbook M1 came out because the Macbook M1 only supports 1 external display monitor.

This doesn't appear to be a cable issue nor monitor issue.

I have tried multiple branded cables from USB-C to DP and it will not detect the display on my 2023 Macbook M3 Pro. I have also tried a USB-C docking station to display ports using different cables directly plugged into it.

Nothing natively works other than HDMI to HDMI direct at a lower resolution capped out at 60hz for the M3 Pro. I have also factory reset the G9 and updated the firmware with not change in results.

Using the same USB-C to DP cables and/or docking stations, both my M1 and M2 MacBooks, Dell laptop and Personal PC and they detect the display and output the full 5120x1440 at 120 hz. I don't recall if it will put out 240 hz or not. I can check if this matters later.

If anyone finds a native fix please post.

The problem back again to me, i have very poor, macbook pro m3 max + samsung odysey g9 5k2k

here i have 5k2k 60hz, if if go 120hz/hdr it will not work, on my windows laptop (much much much worse) it works perfectly fine.

Same issue with 2023 Macbook Pro M2 Pro.

I tried hdmi-hdmi and usbc-hdmi with same result - max resolution 3840x2160.

Tested with hdmi 2.1 cable that I'm using for my PC mainly for gaming at 5120x1440 240Hz.

I'm not sure how to configure BetterDisplay correctly tho as it still caps at 4k res.