Monitor Colours Washed Out with HDR disabled after laptop wakes up from Sleep

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Monitor Colours Washed Out with HDR disabled after laptop wakes up from Sleep

Hi There,I've had 2 MacBooks with 2 external monitors and more often than not the secondary display becomes 'colour washed out' when it comes out of 'Sleep mode' even though the High Dynamic Range (HDR) setting for all my displays are unticked (HDR is disabled). I often play around with enabling and disabling HDR, changing the scale of the monitors and eventually the second monitor comes good again and the colours are find. This doesn't last very long and I have do do this every time.

When the laptop wake sup It seems to be enable HDR (my monitor shows a bundle on the top right corner that says "HDR". In the display settings HDR is not checked.

What can I do about this?

2 x LG 27in UHD IPS USB-C HDR400 Monitor (27UL850)

MacBook Pro (15-inch, 2017)

Catalina 10.15.6 (19G2021)

Graphics; Radeon Pro 555 2 GB, Intel HD Graphics 630 1536 MB

Other laptop

MacBook Pro (13-inch, 2019)

MacBook Pro

Posted on Aug 27, 2020 3:45 PM

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Answer 1

sterling r

Community Specialist

Aug 28, 2020 7:45 PM in response to tr360

Hello tr360,

Thanks for using Apple Support Communities. From your description it sounds like you're having an issue with the external displays color after waking your Mac from sleep. We want to help with this! How do you connect these monitors to your Mac? Let's also take a look at the following steps to take when facing issues with an external display: Get help with video issues on external displays connected to your Mac

Resetting the NVRAM is also a good step when facing video related issues. Here's how: Reset NVRAM or PRAM on your Mac

If the issue continues, do you by chance use any type of third-party display software? If so, does temporarily uninstalling that seem to help? Have you noticed this happens when certain apps are open? The more details you can provide the better!

Keep us posted.

Thanks!

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Monitor Colours Washed Out with HDR disabled after laptop wakes up from Sleep

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