User profile for user: hwil12
hwil12 Author
User level: Level 1
4 points

Mac mini M4 keeps resetting/unrecognising display settings after turning off

Whenever my Mac mini M4 falls asleep or shuts down and I turn it on again the display settings change. The monitor I have is a Samsung Odyssey G4. It seems like it unrecognised the display as the colour profile changes, brightness cannot be increased or decreased and I can only set it to 60Hz even though my monitor supports 240Hz. The issue resolves itself when I remove and reinsert the HDMI. Is this a bug which can be fixed through an update or is there a setting I may need to change?

Posted on Mar 29, 2025 8:33 AM

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User profile for user: den.thed
den.thed
User level: Level 10
84,982 points

Mar 29, 2025 8:58 AM in response to hwil12

If you are using one of the Samsung supplied cables or a low grade HDMI cable.


Replace that HDMI with a short high speed 8K 2.1 HDMI cable.

for example: https://www.amazon.com/dp/B08M9HND4F/ref=sspa_dk_detail_0?


Or.... a short 8K USB-C to DisplayPort 1.4 high speed cable.

for example: https://www.amazon.com/dp/B0BXLDJV3Y/ref=sspa_dk_detail_3?

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Mac mini M4 keeps resetting/unrecognising display settings after turning off

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