Level 1

22 points

M1 Macbook air external display issues with usb-c

My M1 MacBook air is having issue when connecting to my 4k Asus pa279cv display over usb-c to usb-c cable directly to the usb-c DisplayPort, but it is okay when connecting to HDMI port with usb-c hub.

The monitor supports 65w and DisplayPort 1.2 and it should be fine as I tested it with with 2016 MacBook Pro 13" and 2020 Intel MacBook air.

So I start to guess it would be the m1 issue and I reserved Genius Bar to fix my computer.

However it just fine when plugin to the LG 5k Display in the apple store.

After that, I tested it again at home.

I notice that it pops up a message "Unplug the accessory using too much power to re-enable USB devices", but my monitor is charging up the Mac properly.

Lastly, I found that it is occasionally work with the usb-c to usb-c cable to the monitor.

And it could not connect again when the the Mac disconnected with the monitor.

I am frustrated with the situation, and my Mac just arrived serval days.

MacBook Air

Posted on Dec 4, 2020 7:07 AM

Top-ranking reply

steve.damico

Level 1

14 points

Posted on May 14, 2021 7:59 AM

Hey sparrowhawk360,

Initially, I just ran the monitor firmware update (PA279CVFWUpdateToolV019) and everything worked fine. Since I had the Hub firmware update (PA279CVHubPDFWupdateforMacOS) handy I ran it as well so that it's all up to date. When I ran the Hub firmware it didn't recognize the USB C connection. After a brief freak-out, reboot, trying to re-run the monitor firmware update (which didn't work because it was already updated) and few on/off it resolved itself and is now working fine.

Note that the most recent firmware update is v019: https://www.asus.com/us/Displays-Desktops/Monitors/ProArt/ProArt-Display-PA279CV/HelpDesk_Download/

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66 replies

grandtom

Level 1

12 points

Dec 28, 2020 12:18 AM in response to Alfredmm1

It just worked just now by simply plugging the usb-c: it's really too random !

Alfredmm1 Author

Level 1

22 points

Jan 26, 2021 8:32 PM in response to ptarlos

Everyone come form different issues, sigh

ptarlos

Level 1

4 points

Jan 27, 2021 5:56 AM in response to Alfredmm1

Yeah ... feels like we're the beta testers for this M1 hardware. In time Apple will catch up with it's software.

RiCKSMAD

Level 1

4 points

Jan 29, 2021 5:56 AM in response to Alfredmm1

Same issue here.

Brand new MacBook Air M1 8GB RAM, when connected with Samsung C34J791 Ultrawide 34" via usb-c the display is significantly laggier.

Sometimes I have to restart the laptop.

Alfredmm1 Author

Level 1

22 points

Feb 3, 2021 4:44 AM in response to Alfredmm1

Is there is anyone can solve the issues after updating to 11.2?

My issues still not be solved

MrDindon

Level 1

10 points

Feb 3, 2021 4:51 AM in response to Alfredmm1

It was working A1 for me with previous beta and went back to 30hz with this morning 11.2 update. Apple, we are not beta testers... We paid the big price... Fix it !!

Chrizard

Level 1

4 points

Feb 3, 2021 4:54 AM in response to Alfredmm1

Nope, same as before for me. 11.2 did nothing.

Feb 3, 2021 5:17 AM in response to Alfredmm1

Same issue

RiCKSMAD

Level 1

4 points

Feb 3, 2021 5:21 AM in response to sparrowhawk360

Same issue on 11.2

mlierley

Level 1

8 points

Mar 1, 2021 9:14 PM in response to Alfredmm1

I an having a similar issue though mine will work great for hours and then just loose signal like I unplugged it. 15-20 second later it will reconnect and go on like nothing happened.

mlierley

Level 1

8 points

Mar 1, 2021 9:16 PM in response to ptarlos

I have 2 docs, 1 is connecting to the external monitor via HDMI (Buggy and looses signal often), the other is VGA without issue. This is a mess.

Mar 17, 2021 6:44 AM in response to Henk Smets

Everything has been working for me for the past few weeks. Got a new headset. I think it was likely the headset cable all along and not the USB-C port that was the problem.

Mar 17, 2021 4:11 PM in response to grandtom

Yep same issue, at first it works but after then usb c wont work on monitor. hdmi is fine though..

idk what caused the problem

Alfredmm1 Author

Level 1

22 points

Mar 22, 2021 8:18 AM in response to Alfredmm1

Oh my god...the issues still not fixed, it is half year since I bought the computer

Apr 10, 2021 6:14 AM in response to hotinyip

Thank you hotinyip. My MacBook Air M1 2020 laptop finally works on an old Samsung TV.

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M1 Macbook air external display issues with usb-c