M1 Macbook air external display issues with usb-c

I acquired another version of the exact same headset setup I was using, with a usb port plugged into an apple USB-c adapter and everything has been working perfectly ever since. Four days now. Hope it continues

I have been using a usb-c to mini display port adapter to connect my M1 MacBook Pro to a 24” Apple Cinema Display, worked perfectly until the last Big Sur update (11.2.3). Display doesn’t work at all now. Logged with Apple support

I thought the same! it's incredible that Apple stil didn't fix this problems! it impossible for me to work this way...

if they can't fix it within a days I'm returning mine... I need a solid machine to work!.

I just picked up an ASUS PA279CV display and had similar issues connecting it to my 2020 McBook Air Intel (it did not connect to USB-C but did to HDMI). I did two things.

First, the USB spec was set at 2.0 so I changed it in System Settings > USB Setup to USB 3.1

Second, I found an ASUS support page with instructions on updating firmware for the USB C problem (https://www.asus.com/us/support/FAQ/1045839/) with a download that includes PDF instruction to firmware version V018 via USB flash drive. This article has additional instructions for M1 but, since my Air isn't an M1, I didn't complete that part. After updating the firmware it is charging and seems to be working fine.

I hope this helps.

I just picked up an ASUS PA279CV display and had similar issues connecting it to my 2020 McBook Air (Intel) - it did not connect to USB-C but did to HDMI.

I found an ASUS support page with instructions on updating firmware for the USB C problem (https://www.asus.com/us/support/FAQ/1045839/) with a download that includes PDF instruction to update the firmware to v018 via USB flash drive. After updating the firmware it is charging and seems to be working fine.

By the way, if you want the display to run at 60Hz, keep the USB spec set to 2.0 (System Settings > USB Setup). Changing it to USB 3.1 makes the display run at 30Hz)

I hope this helps.

Hi Steve.

Thanks for posting this. Good find.

Did you have to run both tasks? IE First of all there is a link to a general FW updated (to 018).

Then there is an update for the Hub too.

Did you run both or just the first?

Cheers Steve

I had my ASUS replaced yesterday after my first one failed and noted it came with FW V019. So I just ran the Hub Update script and all is working now.

Also using SwitchResX and finally have much faster mouse at 60hz.

I can't connect via Displayport to Samsung Oddessey G7. Have tried all updates. Possibly hardware issue. New Samsung Displayort cable and via Displayport to USB-type C connection. New adapter, Maxnor USB-C DisplayPort 1.4 Adapter. Very confused to why this connection isn't valid, the computer recongnizes the display but nothing displays, HDMI works fine, but Hertz is limited.

Hey guys, wanna ask when you switch the colour profile to dci-p3 on Asus PA279CV will the display become yellowish? I'm having this problem, when i switch back to sRGB mode and standard mode, it wont have the yellow tint on it.

I've updated the display firmware and also reset the monitor. Can you please help to try out on your monitor??

My setup

Macbook air m1 base model- USB C to C connected to Asus PA279CV

i've also tried USB C- HDMI. Still the same problem on DCI-p3 yellow problem

MACBOOK M1 HAS BEEN AWESOME WHEN CONNECTED TO USB – C HUB

This news appeared since December on the forums of Apple users, especially those using the M1 series. With this report, the MacBook M1 encountered a very puzzling shutdown error when connected to USB Type - C Power Delivery.

What happened to the MacBook M1 and USB Type-C Power Delivery?

The initial symptom of this error is that the MacBook M1 cannot power on even though the battery is full. Besides, some users have heard sounds like clicking or typing on the keyboard. This behavior occurs when the power cable is plugged in or out, or when the MacBook M1 is in sleep mode with the hub connected.

At the time of the above incident, all MacBook users could do was just return the MacBook M1 to the company for repair or buy a new MacBook.

Apple will have a new update

[Link Edited by Moderator]

I had a similar problem with a USBc-HDMI adapter attached to a TV display and my Macbook Air (M1, 2020, OS X Big Sur 11.6). As usual, the Apple support tech told me to update my OS X, which took an hour and did nothing! While waiting for the update to finish, I found the solution in https://www.lifewire.com/fix-external-display-not-detected-on-mac-5096070. In my case, it was the Retina Display True Tone setting that was clicked on. As soon as I turned that off, it allowed the OS to recognize the external display. That is a bug that Apple should know about and fix! It looks like a lot of M1 users have those knind of problems.

Hi, Steve, does it means that we need to change the usb setting to 2.0 then the monitor only able to run 4K at 60Hz? and will the change to 2.0 affect another performance like the rest of the usb dock and also the usb-c connectivity (image quality and data transfer)?

Thank You

Same issue there ! Mac Mini M1 + LG32UN880: HDMI OK but USC-C/Thunderbold KO (no signal).