LG Ultrafine 5K M1 Mac spurious vertical shift in a 2 inch band on screen

Or just use the other cable that comes in the box (usb-c). 5k and hub works. Zero issues.

Hello

Saturday I restored my Mac mini with Apple Configurator 2 DFU mode using another mac and an Apple USB-C cable with the Big sur 11.5 RC ipsw file .

for the moment everything is working correctly

The most recent macOS updates appear to have resolved the issue for me.

Thank god someone else has this and is able to describe it. I have the identical problem and purchased maybe a month ago. My screen will correct itself if put to sleep and woke up again. I have tried removing all devices and anything I could think of that may cause interference and still happening. It seems to happen randomly and the only thing that fixes is a restart or sleep/wake. Has anyone tried a new thunderbolt cable? its the only thing I can think of. Also this happens on windows OS as well as Mac side.

Let me know if you still encounter with the new cable. I have also switched the cable, but to a USB-C. It’s only been one day so time will tell but I’m wondering if the thunderbolt cable is the culprit.

The other thread talks about configuring a hot corner to put the machine to sleep and that upon waking from sleep the fellow Mac user says the issue goes away, so that might provide a workaround that does not involve rebooting or unplugging.

Apple Support have asked me to try running at a scaled resolution and report back if the issue occurs while *NOT* running at the display panel's default resolution of 2560 x 1440. I'm going to try either 2880 x 1620 or 2048 x 1152 (whichever is easier on my eyes). The support engineer asked me to hold down [Option] while clicking on the "Scale" radio group button so that a list of explicit resolutions appeared like this screenshot shows. I'll report back here as well.

This is the easy fix that worked for me:

-posted here by Ross

Its specifically related to the thunderbolt 3 cable spec. As other users have said, replacing it with another Thunderbolt cable won't resolve it.

Use the USB-C cable (the other one) that came with it. It should work just fine.

-Both LG should let everyone know about this purchasing the monitor and the Mac Mini.

I installed MacOS Big Sur 11.2 and today the problem happened again after switching back to the thunderbolt cable.

So the two ways I'm currently using to avoid the problem with my M1 mac mini and LG 5K are:

1. Configuring the energy saver options to "Prevent computer from sleeping automatically when display is off"
2. Using the USB-C cable instead of thunderbolt cable.

I'm going to keep thunderbolt cable attached and try #1 above now on 11.2 to see if that definitely avoids the issue without switching to USB-C cable.

I've just upgraded to 11.2.2 Big Sur and switched back to the Thunderbolt 3 cable between my LG 5K and M1 Mac Mini to see if by chance this OS upgrade resolved the issue. I'll report back. If it happens again, I'll switch back to the USB-C cable since the issue never occurs when using the USB-C cable instead.

Unfortunately it just happened again to me in Big Sur 11.2.3. So issue is not yet resolved. Forcing the machine to sleep and then re-waking it made it go away, but I'll probably switch back to the USB-C cable to avoid it until a new OS version come around to try again...

@ reportaman, Your issue describes my problem exactly. Thank you for taking the time to describe in detail. I just purchased an Apple MacBook Air M1 and see the same verticle mal-alignment issue on the same monitor as you, LG 5K (less than 6 months old). This did not happen on my 2018 15" MacBook Pro. At first, I thought my monitor was defective but now it is apparent the M1 Air is causing this issue. Taking a screenshot will not show the issue, but I have attached a photo from my iPhone so that the issue can be viewed.

Although I have confidence that Apple will find a fix, it is distracting to work with this issue. I see 88 fellow users also have the same issue.

Same Here. Using Hot Corner to put the monitor to sleep and log back in resolved my issue temporarily, or un-plugging the thunderbolt cable and plugging back in. Hopefully this gets resolved in Monterey.

So, what you are saying is you see no difference in the resolution...check this...does the monitors brightness respond to the keyboard keys....and even the F keys...if they do great...

I have found that if I put the computer to sleep for about 5 seconds and then wake it up that cures the issue temporarily . However, now, for some reason it happens rarely...I have another monitor on order from B and H but they have no idea when it will come in. I have 30 days to return to B and H. Also, I have an issue with the power chord. The power cord supplied with my monitor does not fit the receptacle firmly. Thus the monitor shuts down if I move it slightly. I have trying some other power cords I have to see if they fit better. Otherwise the display at 5k is what I have expected.

I realize it may be a bit early to tell but, I went back to the TB cable from LG just before 11.5 came out. 11.5 gets installed and I have yet to have any issues. I would've seen it by now. It was happening every other day, if not daily.