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hellenicsun Author

Level 1

9 points

Static when waking up Mac Mini M1

I have this issue since I got my Mac Mini M1 back in May 2021.

When I wake it up, at least twice a day, it will display static instead of login screen and I have to unplug/ plug the cable (more than once some times) to the Mini before I get back right picture.

I'm using this cable (sized 3 feet 3⅜ inches or 1m) with this screen.

I have the latest macOS 12.1 (21C52) so it's not software related.

Any thoughts, suggestions and/ or ideas?

Thank you and happy holidays!

Mac mini, macOS 12.1

Posted on Dec 21, 2021 12:31 AM

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Level 6

11,402 points

Posted on Dec 21, 2021 3:39 AM

At 6 feet, the cable is a bit too long. I would replace with 3 or shorter.

Separately, disable Sleep, it’s unnecessary on later Macs, all pain, no gain. Shut for long absences i.e. > 2 hours. To disable, check “Prevent…” in Energy Preferences and uncheck everything else. You can leave the display off time as is, unrelated to Sleep.

If disabling sleep does the trick, you can stick with the 6’ cable. Good luck!

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Level 6

11,402 points

Dec 21, 2021 3:39 AM in response to hellenicsun

At 6 feet, the cable is a bit too long. I would replace with 3 or shorter.

Separately, disable Sleep, it’s unnecessary on later Macs, all pain, no gain. Shut for long absences i.e. > 2 hours. To disable, check “Prevent…” in Energy Preferences and uncheck everything else. You can leave the display off time as is, unrelated to Sleep.

If disabling sleep does the trick, you can stick with the 6’ cable. Good luck!

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hellenicsun Author

Level 1

9 points

Dec 21, 2021 11:11 PM in response to hcsitas

I have done what you've told me and will be monitoring Mini's behaviour before I update this thread.

For the record, I'm not using a 6 feet cable but a 3 feet 3⅜ inches one - as I stated previously.

Thank you for your time and help.

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Level 6

11,402 points

Dec 22, 2021 12:13 AM in response to hellenicsun

Well, the FAQ on the link states only 6' is available. Anyways, good to know and look forward to your update.

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hellenicsun Author

Level 1

9 points

Dec 25, 2021 8:41 AM in response to hcsitas

It did solve the issue! Thank you once again!

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Level 6

11,402 points

Dec 25, 2021 8:42 AM in response to hellenicsun

Nice to know, thanks for updating! 🍻

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hellenicsun Author

Level 1

9 points

Dec 26, 2021 11:19 PM in response to hcsitas

Unfortunately, the issue reappeared so either the above suggestion is not working, or something else is the issue.

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Level 6

11,402 points

Dec 26, 2021 11:24 PM in response to hellenicsun

Sorry to know. What make and model monitor? What’s connected to the USB/TB ports? Also, it’s time to try a new cable.

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hellenicsun Author

Level 1

9 points

Dec 26, 2021 11:26 PM in response to hcsitas

It's this monitor. One TB has an external HDD and one USB has a dongle to connect a wireless mouse.

I can try another HDMI cable.

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Level 6

11,402 points

Dec 26, 2021 11:30 PM in response to hellenicsun

Nice-looking monitor! Try it’s other HDMI port? Also a wired mouse and keyboard (if non-Apple). Let’s wait on swapping the HDMI cable.

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Static when waking up Mac Mini M1

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