Big Sur 11.1 External Display Issues!

This is what worked for me:

1. Install the newest version of display link, which can be downloaded here: https://www.displaylink.com/downloads/macos
2. Once installed, go to finder > applications > double-click on Display Link Manager
3. This will open your system preferences > Privacy to authorize display link for Screen Recording
4. Allow permissions
5. All set :)

I too have had severe issues with Big Sur monitor handling from Big Sur 11.2 onwards including crashing my Mac Mini server so that it was un-usable.

Apple support said "reinstall the operating system" which did not help.

The work arounds that were successful were:

1. buy an SIIG displayport adaptor to work with my M1 Mac Mini and download the DisplayPort Driver. This now drives three screens perfectly.
2. I found an old Kensington USB docking station that has a VGA port and a Display Port logo. I downloaded the DisplayPort Driver to this machine as well and now my VGA monitor works again and I can reboot the machine !

Clearly Apple monitor drivers went backwards in the 11.2 and 11.3 releases and Apple and Apple support have not recognised this.

I also have the BenQ PD3220U..

I managed to fix this from going into the Monitor Settings and switching the Display Port off 1.4 and Selecting 1.2, I now see the original OSX scale options..

Difficult to believe this is an issue.

I have the Apple 27 inch Thunderbolt display and MBP 2020..... issues started happening so I changed the resolution on the monitor and it seems like a temporary fix until they patch the OS. Apple support, why dont you reply to all the concerns on this board and at least say you are working on the problem.

Same issue with BigSur 11.1: getting only 1080p when connected.

I read that changing the DisplayPort version on the monitor to 1.2 my help, but on my case it only gets 30Hz with 4K, feels incredibly laggy. Weirdly the monitor show as 61" on the About this Mac window, when it's actually 32".

I tried resetting PRAM/NVRAM, SMC, boot on safe mode… nothing works.

The monitor was working fine at 4K @ 60 Hz before the update, I'm still using the same Thunderbolt 3 cable that comes with it.

Monitor: BenQ PD3220U

Device: MacBookPro16,1 (MacBook Pro (16-inch, 2019))

macOS Big Sur 11.1 (20C69)

hi,

I have my problems with 16” MBP 2019, not solved I talked

in previous posts.

ok, but yesterday Inwent to a store and I purchased a Mac mini M1 . And it

doesn’t work! It detects my 49” like a 12” monitor. Totally shocked , and it was with 11.2 big sur!!

Look the photos.... no comments

I still cannot get 144Hz on a 4K monitor. I am limited to 120Hz using 1.4 (not using DSC)

Using DisplayPort

Emailed Craig and he said "thanks for the report." Not sure how much this means if anything at all in terms of Apple fixing the bug.

I just installed 11.2.2 on my 4TB Macbook Pro - No luck.

If I use 2 USBC ports, 1 monitor plugged into each, it works. But any kind of hub that is meant for multiple monitors and no luck.

It used to work so well before Big Sur. I wonder what Apple changed that stopped this?

Below is a screen shot of my specs.

Oh, does anyone remember the mini-display port issues from years back. I wonder if there is some kind of hack like that to enable the USB-C port to send out display information for both screens on a single port.

Just wondering.

[Link Edited by Moderator]

Using SwitchresX on macOS 11.2.3 I have a full range of resolutions available on my apple Cinema Display art 60Hz, or 59.88 if you want to be picky. Please don't comment if you don't know what your talking about. thank you

Well, this definitely looks like an OS issue to me. BigSur update was almost pushed 3-4 days later my purchase and till that point, I did not have USB C adaptors so do not have much to say, but in the initial days of update, even the power was pushing an issue in the machine.

Now my screens, just start giving different colors. It also affects the applications I use for chat (Slack, Whatsapp, and Zoho Cliq), these applications give a flickering kind of thing.

After reading things on the internet, it seems it definitely is a refresh rate kind of an issue. Used and tried two different monitors. Its the same issue. Tried an HDMI to USB C Wire and an adaptor both. Maybe Apple will fix this up soon. The machines get really really hot.

Good news, after update to 11.3 this issue has been resolved (for me at least). I now have 4k @ 60Hz working with my LG 32UD99 monitor via USBC cable. I'd suggest trying it again, and perhaps changing any monitor settings related to display port 1.2/1.4 (eg: enable or disable) and restart/reconnect just to make sure.

I have just updated to 11.5 and tried switch the second external display to displayport (it is connected to both hdmi and displayport).

This hasn't worked. See attached image. When I have switched to displayport on the monitor, it is recognised by the OS, but there is no image output.

So it seems macbooks can not function properly (at least not with HP G5 docking station) with only one usb-c cable connected.

I used one cable to the docking station and another one HDMI to usb-c.

So it worked with 2 cables on 2 usb-c ports.

I really wonder why much cheaper laptops work great just with one cable to the docking station.

Same issue here. I'm using a LG Ultrafine 5K and a LG IPS224 Full HD connected to a MacBook Pro 16. The Ultrafine connected via Thunderbolt 3, and the other one using HDMI to Type-C. No issues til I updated to 11.1, when the Full HD display stop working (SMC and PRAM reset did nothing). The Ultrafine still works.

I hope Apple fix this ASAP.

Temporary workaround. Using LG on screen controls, change display port version 1.4 to version 1.2. After that I am able to get full 4k from the monitor but I lose HDR. The display is still incorrectly identified as 27 in screen.

Could you explain these instructions in a bit more detail?

Presumably in the monitor OSD settings (on the monitor controls?). I only seem to have the option for DiplayPort1,2 enabled = yes/no.