M1 MacBook Air with external monitor crashes when sleeping

Same problem M1 Mac mini with 11.5.2. This only happens if I set connection to DisplayPort 1.4. The Mac doesn't crash with DisplayPort 1.2, but it occasionally reverts to lower resolution on wake. Very annoying!!

The problem seems to have been fixed on MacOs 12.0.1 (Monterey). I've got a MacBook Air M1, I've done multiples tests yesterday and this morning, and I didn't have any kernel panic / crash. Knock on wood!

I have the same issue using thunderbolt3. I switched to HDMI for now, and I don't get the sleep crashes. Annoying because I want to use the monitor for Raspberry Pi development using split sceen, and AFIAK, rasp Pi is only HDMI.

Same issue for me. I have an M1 Mac Mini with an LG 4K display. When I connected via HDMI, I did not have this problem at all, but now that I am connecting via thunderbolt, it does a panic restart.

in your monitors settings, set the DP from 1.4 to 1.2 - this resolved it for me

Same for me. I changed my monitor settings from DP1.4 to DP1.2 (LG 32UL950-W). No crash/panic since then.

Same monitor, same laptop, switching the monitor DisplayPort to 1.2 solved it

@jwtraglia

Most, but not all of these issues are resolved in MacOS 11.3. Update and see how you go.

Apple believe this is now fixed in 11.5

Quick update for everyone... LG just released an updated version of "OnScreen Control" on 27 Jan. This version (4.48) now recognises the 38WN95C monitor, but the only working feature so far is "Screen Split". The software isn't yet able to update the monitor firmware.

So we're still waiting on Apple and/or LG for a software fix for the sleep issue everyone is experiencing. A recent comment on Reddit provides a plausible explanation for the issue:

"I suspect this has to do with the fact that starting with Big Sur (Mac OS 11) the Kernel Extensions which were used by LG to connect at a low level to the monitor, have been deprecated. There is a new Kernel Module architecture that can be used to solve the problem but will require new programming. What is annoying about this, is that Apple has started with Catalina to deprecate these extensions and all vendors (including LG) have done nothing to adapt to the new system... let's hope there will be a new version soon, and let's hope the new release of Big Sur (11.2) will fix the resolution issues with the wide screen monitors."

Looking forward to a solution to end the daily/nightly crashes!

i contacted caldigit about this just to see if it was on their end and this is their reply

"Thanks for contacting us. This is an issue that we have seen previously with macOS computers and I would encourage you to contact them for assistance on this issue. Our information suggests that this is an issue with these computers (specifically the operating system’s interaction with basic Thunderbolt 3 drivers) which is causing this kernel panic with any Thunderbolt 3 device connected. Please note that this has been found with any Thunderbolt 3 device connected to the computers which have this issue and is not caused by your docking station."

i just want to once come back to my docked laptop and hit the spacebar and be greeted with a login screen instead of a black screen followed by a restart and a crash report. cmon tim apple. i bought your computer because it was supposed to "just werk"

Apple decided the cause of crash is bad logic board and Touch ID so they replaced them. The problem is that my M1 MacBook Air came back from Apple repair center with scuffs that didn’t exist before. They first refused to fix it, then they changed their mind so I’m waiting for them to send me the box to send it back for another repair. I’m not sure if the original issue was fixed by replacing parts yet but I’m very disappointed by Apple.

I just installed 11.3 last night...issue resolved!

I changed my DisplayPort version back to 1.4...now I have 144 Hz going on the LG ultrawide and no kernel panics with sleeping.

newest 11.3.1 big sur update seems to have fixed the crashing issue. havent had it since the update. thanks tim apple.

havent tried beta 2.

also, I don’t know how relevant this is, but I did a full clean install (what a horror show) and set the never sleep setting (lame) and it has not had any night terrors since.

Here’s the part that may be completely inconsequential: there were a lot of deltas between this not happening and then starting to happen:

1. new monitor 38 inch LG (previously using the 34 inch LG via HDMI KVM)
2. set chrome (gmail) as my default mail handler (this is the part that may have something to do with this?) curious to know if anyone else changed their default email handler.
3. was messing around with a DisplayPort KVM (connect pro) and settled on TB3 for now, which is how I discovered the issue.
4. i have another MBPro that works fine over TB3 connected with the same cable to the same monitor, no crash, but not running Big Sur and chrome is not the default mail handler

anyway, that’s the latest