Can't adjust brightness and no audio for LG ultrafine 5k display with m1 macbook air

I recently update my m1 MacBook air to Ventura 13.1

Now I can't adjust the brightness, and I can't select the monitor as the audio output.

I already tried:

unplug and replug the thunderbolt cable.
unplug and replug the power cable of the monitor.
reboot the computer.

but still not getting it back to normal.

Posted on Dec 24, 2022 08:06 AM

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1 reply

vlad372 Author

Level 1

4 points

Dec 24, 2022 08:08 AM in response to vlad372

Under safe mode, the behavior is the same.

For LG ultrafine 5k display, 27MD5KL-B, there are no buttons to adjust the brightness.

Previously, I could adjust the brightness from System preferences -> display -> LG ultrafine display, There is a slider to adjust the brightness, or shortcut: control + F1/F2.

Now the slider disappeared and the shortcut is not working even under safe mode.

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Can't adjust brightness and no audio for LG ultrafine 5k display with m1 macbook air

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