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Diogones Author

Level 1

5 points

M1 Max MacBook Pro 16" shows green screen and restarts when connected to external display

Kernel panic

Hey all,

I have an M1 Max MacBook Pro 16" with 32GB of RAM, 1TB storage and 32 graphics cores which I've encountered a strange problem.

I'm running a clean install – not an upgrade from Catalina – of MacOS Ventura 13.0.1 and for some reason, I have a fatal error that I can replicate.

When I attach my MBP to my external monitor via an Anker Lightning (USB-C) to DisplayPort cable, along with my USB hub for using a mouse and keyboard, close my laptop lid with the power connected so that it does not go into sleep mode, and then attempt to use a graphics heavy app, such as a video game or video editing, at some point the image on the monitor will be replaced by a solid green screen, and the Mac will restart itself with the error "Your Mac was restarted because of an error."

It will happen every time I do this, which is why I can replicate it. I have several kernel panic logs that I can share with someone who knows how to parse them and shed some light on this mystery. I have attached the most recent one to this post as additional text. As far as I can tell trying to skim through it in Console, the error is always the same.

I should also add that I have an M1 MacBook Air that I was able to use to try and replicate the issue, and was unable to do so. When connected with the same display cable, to the same monitor, with the same USB hub also attached, and with the Mac lid closed, I was able to compute successfully for quite some time without encountering the same green screen crash and restart at all. This leads me to believe there is something wrong with the MBP, though I hope it is not on a hardware level.

For troubleshooting, I closed out any and all extra programs that I had running in the background, but no luck there. I also restarted the Mac while holding down the TouchID button to bring up the boot menu, and then held down Command + D and ran the Apple Diagnostics, but that returned no issues, even after I ran it again.

MacBook Pro 16″

Posted on Nov 18, 2022 2:01 PM

Top-ranking reply

Diogones Author

Level 1

5 points

Posted on Nov 20, 2022 10:15 PM

– I created a fresh volume from my recovery partition when booting up, and then installed a clean copy of Ventura on that with no other third party programs, and it still happened.

– I created a fresh volume from my recovery partition when booting up, and then installed a clean copy of Monterey on that with no other third party programs, and it FIXED the issue!

This leads me to believe that, at least for the M1 Max MBP, with certain monitors, and this AW monitor specifically, Ventura is causing the issue. I am currently in the process of moving my files over from the Ventura to the Monterey volume on my internal drive, and just keeping the Ventura volume until the next system update, to see if that resolves my very specific, niche issue.

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M1 Max MacBook Pro 16" shows green screen and restarts when connected to external display

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