Bright HDR Colors after 10.15.4 Catalina Update

Just upgraded to Catalina 10.15.4 without googling first whether this would be risky. Bad idea!

Same problem with my LG 27UK650 4KUHD and my 2017 MacBook Pro 15". My monitor is connected to my CalDigit TS3 Plus via DisplayPort and the CalDigit is connected to the MacBook via Thunderbolt.

Unplugging and plugging back in the Thunderbolt cable usually fixes it, although sometimes it also takes the HDR checking/unchecking trick, as well.

I notice that whether this sequence of kludgy fixes takes 1-3 tries seems to depend on whether my MacBook lid was open or not. So, some combo of unplugging/plugging in Thunderbolt, checking/unchecking HDR, and then closing/opening or opening/closing the lid definitely works every time. Ridiculous.

However, if Electric Sheep decided to launch itself when Screen Saver starts, which for some reason it doesn't always feel in the mood to do, then it seems to be harder to get the neon colors back to normal and I sometimes have to restart.

I'm resisting doing systematic tests of what works when because I don't want to jinx an update from LG or Apple.

LG had a 2/28/2020 driver update that I installed, but that didn't fix it.

What a ridiculous bug.

I'm having the same problem. I did the macOS Catalina 10.15.4 Update last night (5/5/2020). When I started up my 2018 15" MBP this morning, my dual LG 27UL650-W monitors were really washed out. I found the HDR box in the System Preferences > Displays and un-clicked it. That seemed to help.

Later, a worse problem! After my MBP went to sleep, when I woke it up, I had one "normal" monitor and the other extremely bright where the colors were posterized. It looked terrible.

I have temporarily fixed this problem by resetting my monitors so the displays aren't so ultra-bright, and then changing the setting in my LG monitors to use DisplayPort 1.2 rather than 1.4. This causes my Mac to remove the HDR checkbox from the Display preferences screen for each monitor. I'm pretty sure I would be constantly battling the Mac OS without doing this.

I'm also using a CalDigit TS3 Plus dock. Both monitors are connected via DisplayPort on the backs of the monitors. One cable plugs into the Thunderbolt 3 port on my dock and the other plugs into the DisplayPort port on my dock. I don't think the dock is the problem.

Same problem w LG27UK850, Mac Mini 2018, only I also run an external GPU Vega64, with the added complication that I have to restart 2-3 times to get any image on the screen. That also happened after Catalina.

Changing DP from 1.4 to 1.2 works for me perfectly. I saw you reply and tried it days ago. I’m not bothered by the ultra bright problem anymore! And I didn’t have to toggle HDR back and force anymore.

This is exactly what is going on with me! When I restart/startup the monitor looks super crushed and oversaturated look, I have to do random combinations of checking and unchecking HDR as well as changing color profiles before It kicks back to a good looking SDR profile as it was before. HDR mode is not quite right yet, agreed and looks kinda weird for regular use. Once I fix the the profile on SDR its great till I restart, then it is super crushed and oversaturated look in SDR mode once again until I check and uncheck hdr and randomly mess with with switching back and forth from other profiles (I have yet to find a consistent combo of actions) before SDR looks good again.

I was on support with Apple today and they want me to talk to LG. I haven't had a change yet, but I don't think this is an LG issue as i was fine till this new version of MAC OS Catalina! It's frustrating to do a random song and dance every time I restart for it to look good in SDR. Very frustrating.

Unfortunately what he goes over in the video is not what I wrote about above that I’m dealing with.

He is just telling you to disable HDR, mine isn’t enabled and my contrast and colors are just crushed, no HDR box checked.

This has been driving me nuts on my LG 27UK600 for the last couple months - it seems to come and go.

When it comes back, I go into the Display Settings, toggle HDR on and off a few times, and it seems to go away.

I just noticed that LG released new OnScreen Control Drivers last week, so I updated to those today, did a restart, and it seemed to work ok, no washed out HDR colors.

I restarted a couple more times to test and it seemed to be fine.

YMMV.

Looks like many including myself are facing similar issues with HDR. I am using LG UK650 with MacBook Pro and the HDR gets enabled automatically after the system returns from sleep. I am using HDMI for the external monitor and we don't have a solution.

Like everyone else here, i have the same issue with auto-hdr regardless if checkbox for HDR content in display on or off. Restarting, Plugging USB C cable on/off and check off/on for HDR display only works temporarily and is back again with super contrast view

macbook pro (15inch, 2018, version 10.15.4)

monitor: LG 27UK850-W

Just want to say I've been having the same/similar problem with my dual LG32UD99s, connected by USB-C, one connected directly to the 2018 15" MacBook Pro, the other through an OWC thunderbolt dock. I just noticed this problem because I just got back into the office after being on lockdown. Instead of a blue tint, mine are strongly tinted red/pink. Also, the two displays have slightly different color tints/contrast/resolution issues, likely due to the different connections to the computer. These issues go away as soon as I uncheck the HDR toggle in display settings.

I guess I think it's important that it's noted that this bug might manifest differently depending on whether you are using a dock...

This is interesting, because, although I'm not using the video out from it, I am using the Caldigit T3 Dock which has video out capabilities. But the issue is manifesting on one of my LG 4K displays. I was just informed there is an update to the T3 Dock, I'm going to try it and see if it is inadvertently causing my issues.

I just updated to 10.15.5 and sadly, no change in the issue for me. See my original post in this thread for details on my display issues.

I have had luck by changing my monitor to disable Displayport 1.2 support in the menu. You loose those feature but It seems to be displaying regular SDR content okay. I do NOT count this as a fix tho! :) @apple @LG.

Also, HDR still looks all wrong if left on for regular desktop use. This may not be the intent at this point but there is a milky contrast on the image and an ugly tint.

Same Issue Here.

Machine: iMac Retina 5K i9

Mac OS Version: 10.15.4

Display: LG HDR 4k 27 inch monitor

Display Connection: Displayport from CalDigit TS3+

Turning off HDR is a temp fix, but obviously not ideal.

The same issue just happened to me when upgrading to10.15.5. My LG 34WN80C worked flawlessly out of the box prior to the upgrade. Now I have to mess around with the calibration. Apple why did you believe you needed to fix something that wasn't broke.