M1 MacBook Air with external monitor crashes when sleeping

@jason have you updated to 11.2? I think it was just released today (not the beta, but GA).

I just updated my M1 MBAir... haven't had a chance to test.

Call Apple Support and get your call expedited to a senior advisor. They need to report this to the engineers. There is no fix at this time, but the more people calling in, the quicker the engineers realize that there is an issue. I have a MacBook with the same issue and this has been going on since December. So frustrated!!!

It’s under general settings on the monitor. Hit the button on the bottom of the monitor, hit the bottom option, then bottom option again (general settings). You’ll see DisplayPort listed on the right side there. That’s where you switch it.

(doing this from memory so instructions may not be exactly right)

Same issue with my Macbook Air M1 and LG Ultrafine 5K. If I allow it to go to sleep, a lot of strange things happen when I try to wake it up:

1. Sometimes I see 2 vertical lines with a pixel issue on my LG Ultrafine 5K that only goes away when I reboot the Mac or let it go into sleep and wake up again (a few times).
2. Sometimes the Mac reboots with the warning afterwards "Your mac has restarted because of a problem".
3. Sometimes the Mac reboots without any warning at all.
4. Sometimes I see the original Big Sur background while I choose a different one.
5. Sometimes the screensaver appears and I cannot wake it from the screensaver.
6. Sometimes it seems to take ages before it wakes up again from sleep.

Apple support didn't seem to be aware of this issue (I even talked to a Supervisor who asked me to send me log files and he told me afterwards it was a hardware issue and allowed a swap of the Macbook) and I tried 3 different Macbook M1's but they all have the same problem...

I'm not an expert but I'm quite sure this is a software problem. Unbelievable this isn't solved yet in 11.2.3 or more than 6 months later...

Please, Apple, solve this ASAP! This is VERY annoying!

Submit the issue here: https://www.apple.com/feedback/macbookair.html

That is the only way they will pay any attention to it.

I am also having the same issue. Just got the new MacBook Air with the m1 chip and running on Big Sur hooked up to an LG Screen and my computer crashed several times. Didn’t think it was bc it was going to sleep but until apple fixes the issue I am trying the suggestion of putting the battery saver mode of sleep to never and see if it works.

Hm - you are definitely on to something. More info: according to Wikipedia, TB3 originally used DP 1.2 but in 2018, intel upgraded TB3 using a new chipset and DP1.4

I’ll see if the LG let’s me specify a different DP setting for the TB port and the DP port, because DP 1.2 would be an issue for me on my ultra wide.

Contact Apple Support. The more people calling in, the more likely this issue will be fixed. I've been in-touch with support and there isn't any information coming from the engineers about this issue. I've tried all of the tricks and the only way that my macbook doesn't crash is not connecting it to the monitor. I also tried HDMI and still crashes.

FYI: this issue is also happening to so many people not using any hub, dock or adaptor so I don't think it has anything to do with those devices.

In my case for example I'm using the M1 Macbook Air in combination with the Apple branded LG Ultrafine 5K monitor. I have already received 2 replacements for my Macbook and the issue is still happening on my 3rd M1 Macbook Air.

I also already tried using a different LG Ultrafine 5K monitor and the Mac keeps crashing for no reason (see my crash dumps in previous messages).

So I would think this is a software issue that can be resolved with an update.

So many months and updates later still no fix for such a serious problem (Macbooks crashing after sleep for no reason because they are connected to an Apple branded monitor...)

Who shares my opinion that this is totally unacceptable?

The more we talk about this, the more other victims will find this thread on google, click on the button "I have this question too", add a comment and the more likely it will be resolved.

I'll test changing to DP 1.2. At least my monitor allows the full 144hz mode on also DP 1.2

So quick update. First short nap and no crash (TB set to DP 1.2)

it may be too soon to call you a hero but...

hero.

Updated to 11.5 a few days ago and so far no crash yet. Fingers crossed.

Anybody had a crash after the 11.5 update?

I have the same issue and panic codes on (2) LG38WN95C and both on a Mac mini and MacBook Pro running 11.1 - clearly a SW issue between Apple and LG which surprised me given Apple resells the high end LG product. Always seems to be a sleep issue with the monitor. Any workarounds

Same here. 16gb 1T M1, LG 32UL950W external display. Reliable kernel panic when the computer goes to sleep connected to it, no issue when connected to standalone AC adapter, or on battery. Very frustrating.

This did not help me. Same issue persists on my M1 MBAir and LG 38WN95C-W (when connected via Thunderbolt. I did not seem to experience the issue when connected via dock and DisplayPort adapter of HDMI