Big Sur 11.1 4K monitor resolution settings gone since update

Question

Big Sur 11.1 4K monitor resolution settings gone since update

Updated to 11.1 on my 16 inch MacBook Pro two days ago, ever since I can no longer run my LG 4K monitor at anything above 720p/1024x768.

Have reset SMC & PRAM. Have also OPTION + Click scaled for more options - no dice.

On a google search quite a few other people reporting this issues (also with previous beta versions of Big Sur).

My last option is reinstall macos, which I really don't want to do this is a bad time for this to have happened a lot of work on hunched over a laptop screen cursing the aches! I'm too old for this crap :)

So wondering...

Is there a known fix for this?

Is this a known problem (I can't find anything on these forums when I search)

If this is a known issue, is there a fix incoming from apple?

Thanks!

Posted on Dec 17, 2020 1:22 AM

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Answer 1

Grisoski

Level 1

8 points

Mar 7, 2021 4:57 AM in response to Sebastianooo

I understand, in my case, like many others, the 4k external monitor stopped to work properly after upgrading to Big Sur, so I downgraded to Catalina. I can't believe Apple didn't know the issue when Big Sur has been released.

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Answer 2

Dec 29, 2020 9:17 AM in response to fuzzylogic_uk

I was kindly contacted by an apple support represenative today who called to ask for dianostic infromation they could send to the os engineers to help diganose the issue.

Seems apple do seem to be genuinely taking the issue seriuously. I've supplied a large system diagnostics dump so hopefully this will be sovlved in the not too distant future.

Good luck all!

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Answer 3

Grisoski

Level 1

8 points

Mar 6, 2021 3:16 PM in response to Sebastianooo

But why have to send back a monitor when with previous os worked well? This is a HUGE bug of new os they MUST solve!! If not Apple has definitely become a ridiculous company making products not up to the standard of professional use

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Answer 4

Mar 7, 2021 3:26 AM in response to Grisoski

The thing is, it never worked for me, I got the monitor after upgrading to Big Sur, therefore I can't isolate the issue. It's fine, I'll work with a free Dell from the Office for the time being and wait for Apple reply or a suggested list of external monitor from them.

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Answer 5

Dec 17, 2020 4:04 AM in response to fuzzylogic_uk

Resolution scaling option is back, but text does not look as clear as I recall it used to be before the update. Seems like the scaling is a bit off.

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Answer 6

peterv

Level 1

4 points

Dec 17, 2020 4:49 PM in response to mwventre

Similar issue, using USB C to DisplayPort 1.4 adapter for my Odyssey G9, I can no longer get 5120x1440 resolution. Only 3840x1080 (with scaled set is the preference).

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Answer 7

jordanz

Level 1

18 points

Jan 10, 2021 4:58 PM in response to gobeano

BDStanley - go to the BenQ menu and change to the Display Port 1.2 - it fixes the problem.

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Answer 8

NanorsQs

Level 1

4 points

Feb 27, 2021 12:33 PM in response to fuzzylogic_uk

Still having the same issue on a Benq PD2700u as of Feb 27th...

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Answer 9

Mar 6, 2021 11:43 AM in response to DFTeitel

yeah, because of an issue like that I am sending back the LG32UD99 I bought

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Answer 10

lexlin

Level 1

4 points

Mar 7, 2021 9:41 PM in response to fuzzylogic_uk

FOUR MONTHS, Apple just did nothing about this.

Shame on them.

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Answer 11

Feb 15, 2021 12:50 AM in response to fuzzylogic_uk

I am having the same issue of Resolution not properly configured on a LG32UD99 (sometimes I can go to 1080x720 or 1600xsomething but it's still a pain), and it's affecting my productivity, especially during this time of Home Office.

An chanche it's fixed?

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Answer 12

DFTeitel

Level 1

14 points

Feb 15, 2021 2:26 PM in response to fuzzylogic_uk

The resolution on my 27" LG 4K monitor was also limited via an HDMI connection to my MacBook Pro when I upgraded to Big Sur. I had to switch to DisplayPort via a Belkin hub to be able to increase the resolution to 2560x1440, which is my preferred resolution for the second monitor. It works fine with the DisplayPort, with resolutions available up to 3840x2160; the maximum with the HDMI connection was 1920x1080, or 1080p.

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Answer 13

Dec 17, 2020 2:39 AM in response to fuzzylogic_uk

Same problem here, very frustrating and hugely damaging to my productivity.

I have two identical external 28" 4k monitors, and two identical USB-C to DisplayPort cables. This was all working fine under 11.0.1, and it's all working fine through my Windows laptop, 4k60 on both externals.

About This Mac reports one of them as a 28" 4K and the other as a 30.5" 1080p for some bizarre reason. I assume that in fixing the issue with 5K LG monitors being reported as 4K, they broke this and didn't notice.

I've got a 16" 2019 Macbook Pro, and this is very frustrating. I'm currently downloading the first 11.2 beta, will see if that helps, if not, I'm going to have to downgrade to Catalyst until they sort it.

Thanks, Apple. xx

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Answer 14

Dec 17, 2020 3:15 AM in response to fuzzylogic_uk

Same problem. External monitor is BenQ PD2700U which will only give a maximum resolution now of 1920x1080 and the dialogue screen to select the resolution has changed from horizontal thumbnails to a vertical list of 3 choices.

I would LOVE to know when you're going to fix this ... I presume all I can do in the meantime is roll back to the last backup before the upgrade.

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Answer 15

Dec 17, 2020 3:24 AM in response to fuzzylogic_uk

Seeing a lot of these logs lines repeating over and over


error	11:01:59.843595+0000	corebrightnessd	First attempt at IODisplayCommitParameters for displayID 0x4281106 failed. Refreshing service and retrying.
error	11:01:59.843918+0000	corebrightnessd	service=23839
default	11:02:00.416203+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: Mode has dimensions 1280x720
default	11:02:01.292395+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: Setting mode 0x80003097 with depth 0x1 on displayID: 0x0 fbRegID: 0x100000680
default	11:02:01.292419+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: Alias:0/AppleBacklightDisplay-610-a044
default	11:02:01.298640+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: Mode has dimensions 3584x2240
default	11:02:01.332739+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: Setting mode 0x80007006 with depth 0x2 on displayID: 0x0 fbRegID: 0x100000682
default	11:02:01.332760+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/PEG0@1/IOPP/EGP0@0/IOPP/EGP1@0/IOPP/GFX0@0-1e6d-7707-83ac1c71d8e0721b
default	11:02:01.336242+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: Mode has dimensions 1280x720
default	11:02:03.174174+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: Alias:0/AppleBacklightDisplay-610-a044

default	11:02:03.174186+0000	WindowServer	[WARN] - IOFBSetDisplayModeAndDepth: Mode has dimensions 4096x2560

error	11:02:03.197052+0000	WindowServer	[ERROR] - Attempting to get capabilities from capabilities with no devices

default	11:02:03.210338+0000	colorsync.displayservices	ColorSyncDisplayServicesAgent: updating display profiles for user = 501 group = 20

error	11:02:03.214533+0000	WindowServer	[ERROR] - Attempting to get capabilities from capabilities with no devices

default	11:02:03.214853+0000	kernel	[IGFB][LOG  ][DISPLAY   ] [AGDC] Get link config

default	11:02:03.214860+0000	kernel	[IGFB][LOG  ][DISPLAY   ] [AGDC] Get port status

default	11:02:03.214864+0000	kernel	[IGFB][LOG  ][DISPLAY   ] FB0, port = 0

default	11:02:03.214864+0000	kernel	[IGFB][LOG  ][DISPLAY   ] FB0 Getting display status

default	11:02:03.214865+0000	kernel	[IGFB][LOG  ][DISPLAY   ] FB0 Display status is = 1

default	11:02:03.214867+0000	kernel	[IGFB][LOG  ][DISPLAY   ] Port status = 1, port type = 3

default	11:02:03.215635+0000	colorsync.displayservices	ColorSyncProfileCreateWithDisplayID(0x1b5d5be7)for user euid 501 (uid 0) eguid 20 (gid 0) succeeded. Profile desc: LG HDR 4K

error	11:02:03.216308+0000	WindowServer	[ERROR] - Attempting to get capabilities from capabilities with no devices

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Big Sur 11.1 4K monitor resolution settings gone since update

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