4k@144Hz no longer available after upgrade to Big Sur
 
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4k@144Hz no longer available after upgrade to Big Sur  

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fatheroates
(@fatheroates)
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Joined: 4 months ago
 
Posted by: @tsh3721

MacRumors has a megathread about this issue

 

Not seeing any actual reports of it being fixed just someone saying "I think it's fixed on 11.3 version" but their issue is slightly different.

 

If anything, I think it's a lot of people being confused by this post:

 

Posted by: @b563052622

Just tried on MACBOOK Pro 16''   5500M  11.3 beta2 ,The problem has been finally fixed. dp 1.4    4K 144HZ HDR.

 

But this is incorrect. The user above uses a 2K monitor, not 4K, so the only issue that was fixed was macOS by default shows the resolution they needed, but the capability was always there, you just had to use a 3rd party app in order to see and choose them until recently.

 

The issue of 4K monitors not being able to get 144hz is still persistent as the bugs within DSP are still unfixed. There's nothing new or changed to fix this just yet. 

 

 

This post was modified 2 months ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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fatheroates
(@fatheroates)
Active Member
Joined: 4 months ago
 

Apple has seeded beta 4 of 11.3 Has anyone tested it? https://www.macrumors.com/2021/03/15/apple-seeds-macos-big-sur-11-3-beta-4/

 

 

Posted by: @tim

Oh yep! I tried it this weekend. Somewhat good news! I can confirm on my end that 11.3 beta 2 brings it back to where it was in 11.0. Where I can actually set my desired resolutions properly again (In this case, 5K but downscaled to a 4K panel), but DSC still isn't enabled so I can only see about 98FPS instead of my usual 144FPS.

It's certainly an extremely good step in the right direction. Smile

image from ios 720

Have you tried beta 4?

This post was modified 2 months ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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TiM
 TiM
(@tim)
Active Member
Joined: 4 years ago
 

@fatheroates, Yes. I upgraded to Big Sur 11.3 beta 4 and tested it out. No change from that last post I made. 🙁

So just to reconfirm where we're at. Big Sur 11.3 fixes the issue that 11.1 and 11.2 introduced in that devices using DisplayPort 1.4 weren't working correctly, and often would only show lower resolutions than the panel actually supported. That is fixed, and we can at least reliably see 4K resolutions again. Smile

However, Display Stream Compression still isn't enabled. So if your monitor relies on that technology to achieve its full resolution and FPS, currently you're still limited to the bandwidth of an uncompressed DisplayPort 1.4 stream.

So if your monitor is something like 2560x1440, you won't see any issues. But going beyond that (Such as 1440p ultra-widescreen, or 4K @ 144hz), it still doesn't work properly.

Considering the latest version of Xcode will only run on Big Sur now, when 11.3 leaves beta, I'm going to be forced to upgrade. I'm not 100% happy about this, but thankfully 98hz is high enough that I probably won't notice the difference in day-to-day operations.

 

2017 13" MacBook Pro [7th,2C,U] + GTX 1080 Ti @ 32Gbps-TB3 (Razer Core) + Win10 [build link]  

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fatheroates
(@fatheroates)
Active Member
Joined: 4 months ago
 

@tim, Have you (or anyone for that matter) tried beta 6 yet? I’ve lost almost all hope at this point, but I figured I’d ask :/

 

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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TiM
 TiM
(@tim)
Active Member
Joined: 4 years ago
 

@fatheroates, Hahaha I was wondering if someone would ping me to ask about beta 6. 🤣

Yes, I tried it. No, there was no change to number of frames I was getting (Still 99.88Hz). I already updated my radar with the results, but I still haven't heard anything from Apple.

Honestly, at this point, I feel like even if they figure out how fix it, they probably won't release it until macOS 12. I'm getting deja vu for when they held back support for the Xbox One Elite Controllers until they could announce it at WWDC. 😅

 

2017 13" MacBook Pro [7th,2C,U] + GTX 1080 Ti @ 32Gbps-TB3 (Razer Core) + Win10 [build link]  

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tanmay
(@tanmay)
New Member
Joined: 5 months ago
 
Posted by: @tim

I already updated my radar with the results, but I still haven't heard anything from Apple.

FWIW Apple is looking into this issue. I got a reply for my radar a while back. 

https://imgur.com/a/baNPOt9

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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Xeonsenior
(@xeonsenior)
New Member
Joined: 11 months ago
 

My setup of eGPU + Pro Display XDR x 2 works on Big Sur 11.3.1 perfectly, finally.

eGPU is Razer Core X Chroma + Radeon Pro W5700.

One of the XDRs connects to the W5700 with USB-C port, and the other connects to single DisplayPort with Belkin VR cable.

Both of the XDRs work on 6K resolution and 60Hz. Preference mode enabled, and brightness can be adjusted on Touch Bar.

My Pro Display XDRs are both on the latest update. The firmware version is 4.2.37

 

Someone also reported the update.

https://forums.macrumors.com/threads/a-problem-with-big-sur-and-pro-display-xdr.2261430/

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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