LG Ultrafine 5K accessaries not working when replug to Mac

After I update to latest OS 12.2.1 Whenever I unplug and replug my LG Ultrafine Display, all the built-in accessories such as speaker, mic, and webcam do not work. The only way that I could manage to get this work is to restart the mac. however, the issues appear when I unplug the USB-C and replug again.



Any help?

Posted on Feb 18, 2022 4:08 AM

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Posted on Feb 18, 2022 6:12 AM

Since it works until you unplug the monitor and when you replug it in it does not show, try booting to Safe Mode. That boot up takes minutes and clears caches and other things that may resolve your problem.

How to use safe mode on your Mac - Apple Support

A lot of times just boot to Safe Mode followed by normal boot resolves problems.

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Feb 18, 2022 6:12 AM in response to Ericleungsc

Since it works until you unplug the monitor and when you replug it in it does not show, try booting to Safe Mode. That boot up takes minutes and clears caches and other things that may resolve your problem.

How to use safe mode on your Mac - Apple Support

A lot of times just boot to Safe Mode followed by normal boot resolves problems.

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Feb 18, 2022 4:54 AM in response to Ericleungsc

I also find out more as my macbook pro has 4 usb-c ports two on the left and two on the right,

If I unplug the from the left, the issue happens only when I replug to the ports on the same side.

The is not issue when I use the other two ports on the other side of the mac

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Mar 15, 2022 12:51 AM in response to Ericleungsc

+1 to this issue. After first plug in after restart or after restarting in plugged in state all built-in accessories & USB peripherals (keyboard, mouse dongle) work fine. After unplugging & plugging back in only the display works. Also have encountered the laptop crashing after plugging back in.


Using 2020 Macbook Pro 13in w/ Intel i5 + LG Ultrafine 5K


Tried NVRAM & SMC reset but no luck with those either.

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LG Ultrafine 5K accessaries not working when replug to Mac

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