Lightroom Classic Pauses and Display Temporarily Goes Black in Develop, MacBook Pro 16"

[#1]

Recently, say the last two versions of Lightroom Classic CC, I've had an issue where the app will pause briefly, and then the display goes off for a second or two when switching to Develop or rejecting a photo in Library review.  It's as if the graphics card is crashing and restarting.  I've adjusted settings from automatic to custom and back, and I'm still experiencing this issue.  I've even had it occur when opening a photo into Photoshop. 

I'm using a 2019 MacBookPro 16", equipt with a Radeon Pro 5500M - 8GB graphics card.  Has anyone else experienced this issue?

{Thread moved to the Lightroom Classic board from Lightroom by moderator}

[#2]

Recently, say the last two versions of Lightroom Classic CC, I've had an issue where the app will pause briefly, and then the display goes off for a second or two when switching to Develop or rejecting a photo in Library review.  It's as if the graphics card is crashing and restarting.  I've adjusted settings from automatic to custom and back, and I'm still experiencing this issue.  I've even had it occur when opening a photo into Photoshop. 

I'm using a 2019 MacBookPro 16", equipt with a Radeon Pro 5500M - 8GB graphics card.  Has anyone else experienced this issue?

{Thread moved to the Lightroom Classic board from Lightroom by moderator}

[#3]

Hi,

We're sorry about the trouble with Lightroom Classic. Would you mind telling us the macOS version you are using? Do you experience the same behavior with the Graphics card disabled in Lightroom Classic?

If you have a dual graphics card setup on the MacBook, please try disabling automatic graphics switching to check if that helps. You can check the steps here: https://osxdaily.com/2017/01/08/disable-gpu-switching-macbook-pro/

Please let us know if it helps!

Regards,

Nikunj

[#4]

Thank you, Nikunj.

I'm using Mac OS10.15.7.  I've tried both Auto and Custom graphics in LRc, and after a conversation with Apple Support, I've disabled Graphics Switching in the Energy Saver panel.  I'll do some additional editing in Lightroom to see if that solves the problem.

[#5]

I've adjusted settings from automatic to custom and back

But, in LrC, /preferences/performance/  have you turned off "Use Graphics Processor"?

[#6]

No, I haven't turned off the Graphics Processor.  Other than troubleshooting, what would be the advantage in that?

[#7]

Primarily trouble shooting, to see if a GPU support issue exists. For some cards, especially if not running a 4K display, turning this on can be problematic, the older the card the more possible.

[#8]

Radeon Pro 5500M, so fairly new, mid range, but not low end, and plenty of VRAM. Should not have an issue, but check anyhow.

[#9]

Using the laptop display, or an external monitor?

[#10]

Using the laptop display.  It's a new-ish computer, not yet a year old.  The issue only started occuring in the last several weeks.  I'll test again with the graphics processor off.  Thanks for your assistance!

[#11]

The issue you describe occurs when the MacBook Pro switches from the Integrated GPU to the Discrete GPU. I've experienced it on occcasions with Photoshop but not Lightroom (yet). With Photoshop I found disabling the 'Home Screen' in Preferences eliminated the issue.

BTW, there are threads MacRumors covering the same issue https://forums.macrumors.com/threads/mbp-16-black-screen-when-switching-from-integrated-graphics-to-...  https://forums.macrumors.com/threads/photoshop-turns-off-screen-for-1-2-seconds-when-launching-on-16...  There's also been a couple of threads on Photoshop forum, and here's one on the Apple support form https://community.adobe.com/t5/download-install/blank-screen-for-seconds-when-photoshop-opens/td-p/1...  

https://forums.macrumors.com/threads/mbp-16-black-screen-when-switching-from-integrated-graphics-to-...

[#12]

Thank you, Ian.  I'll read up on it.

[#13]

Ahh, good point

https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html

That leads me to

and that leds me to:

https://support.apple.com/en-in/HT202043