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[GH-ISSUE #973] MonitorControl preventing Mac/display sleep? #589

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opened 2026-05-05 06:18:56 -06:00 by gitea-mirror · 7 comments

gitea-mirror commented

2026-05-05 06:18:56 -06:00

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Originally created by @dtsimon on GitHub (Mar 11, 2022).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/973

Before opening the issue, have you...?

Searched for existing issues
Read through the Monitor-Troubleshooting Wiki
Updated MonitorControl to the latest version (if applicable)

Describe the issue

MonitorControl appears to be preventing my external monitor (and my connected MBP) from sleeping. I turned off MonitorControl and the monitor and Mac correctly went to sleep.

I've tested on two identical monitors, both connected through OWC Thunderbolt docks.

Expected behavior

The monitor and Mac should go to sleep according to the Mac energy settings.

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: 12.2.1
- Mac model: 13-inch, 2019, Four Thunderbolt 3 ports
- MonitorControl version: 4.0.2
- Monitor(s): Dell U3818DW (firmware M3B106)
- Monitor Cable(s)/Connection(s): Thunderbolt, through OWC Thunderbolt dock
- Apple Silicon/M1 (yes or no): no

Originally created by @dtsimon on GitHub (Mar 11, 2022). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/973 ### Before opening the issue, have you...? - [X] Searched for existing issues - [X] Read through [the Monitor-Troubleshooting Wiki](https://github.com/MonitorControl/MonitorControl/wiki/Monitor-Troubleshooting) - [X] Updated MonitorControl to the latest version (if applicable) ### Describe the issue MonitorControl appears to be preventing my external monitor (and my connected MBP) from sleeping. I turned off MonitorControl and the monitor and Mac correctly went to sleep. I've tested on two identical monitors, both connected through OWC Thunderbolt docks. ### Expected behavior The monitor and Mac should go to sleep according to the Mac energy settings. ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: 12.2.1 - Mac model: 13-inch, 2019, Four Thunderbolt 3 ports - MonitorControl version: 4.0.2 - Monitor(s): Dell U3818DW (firmware M3B106) - Monitor Cable(s)/Connection(s): Thunderbolt, through OWC Thunderbolt dock - Apple Silicon/M1 (yes or no): no ```

gitea-mirror closed this issue

2026-05-05 06:18:58 -06:00

gitea-mirror commented

2026-05-05 06:19:01 -06:00

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@waydabber commented on GitHub (Mar 13, 2022):

I don't see how could MonitorControl prevent the mac from sleeping. You can check out what is preventing sleep by looking at the Activity Manager's Energy tab and see the Preventing Sleep column.

@waydabber commented on GitHub (Mar 13, 2022): I don't see how could MonitorControl prevent the mac from sleeping. You can check out what is preventing sleep by looking at the Activity Manager's Energy tab and see the `Preventing Sleep` column.

gitea-mirror commented

2026-05-05 06:19:03 -06:00

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@waydabber commented on GitHub (Mar 15, 2022):

Hey @dtsimon - let me know if you see anything - does the app prevent sleep according to the Activity Manager? Should I keep this issue open? Thank you!

@waydabber commented on GitHub (Mar 15, 2022): Hey @dtsimon - let me know if you see anything - does the app prevent sleep according to the Activity Manager? Should I keep this issue open? Thank you!

gitea-mirror commented

2026-05-05 06:19:07 -06:00

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@dtsimon commented on GitHub (Mar 15, 2022):

Hi Istvan!

I’m traveling this week, so I can’t test. I’ll let you know next week.

/Daniel

On 15 Mar 2022, at 11:53, Istvan Toth @.***> wrote:

Hey @dtsimon https://github.com/dtsimon - let me know if you see anything - does the app prevent sleep according to the Activity Manager? Should I keep this issue open? Thank you!

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Reply to this email directly, view it on GitHub https://github.com/MonitorControl/MonitorControl/issues/973#issuecomment-1067841110, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAZHC2E234W5KNGH4Q2XUATVABTZRANCNFSM5QPNIVLQ.
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You are receiving this because you were mentioned.

@dtsimon commented on GitHub (Mar 15, 2022): Hi Istvan! I’m traveling this week, so I can’t test. I’ll let you know next week. /Daniel > On 15 Mar 2022, at 11:53, Istvan Toth ***@***.***> wrote: > > > Hey @dtsimon <https://github.com/dtsimon> - let me know if you see anything - does the app prevent sleep according to the Activity Manager? Should I keep this issue open? Thank you! > > — > Reply to this email directly, view it on GitHub <https://github.com/MonitorControl/MonitorControl/issues/973#issuecomment-1067841110>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAZHC2E234W5KNGH4Q2XUATVABTZRANCNFSM5QPNIVLQ>. > Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. > You are receiving this because you were mentioned. >

gitea-mirror commented

2026-05-05 06:19:09 -06:00

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@macOS-Mavericks commented on GitHub (Apr 11, 2022):

I'm experiencing the same exact issue with Version 4.0.2 Build 6965 running on a M1 with macOS Big Sur 11.6 . I must remember to slide the control to full brightness so that sleep will work. As mentioned above, the Aerial screensaver seems to have found a temporary workaround for perhaps the same bug - https://github.com/JohnCoates/Aerial/releases/tag/v3.0.8beta1 .

@macOS-Mavericks commented on GitHub (Apr 11, 2022): I'm experiencing the same exact issue with Version 4.0.2 Build 6965 running on a M1 with macOS Big Sur 11.6 . I must remember to slide the control to full brightness so that sleep will work. As mentioned above, the Aerial screensaver seems to have found a temporary workaround for perhaps the same bug - https://github.com/JohnCoates/Aerial/releases/tag/v3.0.8beta1 .

gitea-mirror commented

2026-05-05 06:19:13 -06:00

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@ValXp commented on GitHub (Dec 3, 2022):

Same thing here for version 4.1.0 Build 7034. On an M1 16in MBP running Ventura 13.0.1.
Easy steps to verify:

Put the computer to sleep and swipe on the trackpad, the computer wakes because it's not sleeping.
Quit MonitorControl and do the previous step again. Swiping the trackpad won't wake the computer because it's actually sleeping.

@ValXp commented on GitHub (Dec 3, 2022): Same thing here for version 4.1.0 Build 7034. On an M1 16in MBP running Ventura 13.0.1. Easy steps to verify: - Put the computer to sleep and swipe on the trackpad, the computer wakes because it's not sleeping. - Quit MonitorControl and do the previous step again. Swiping the trackpad won't wake the computer because it's actually sleeping.

gitea-mirror commented

2026-05-05 06:19:15 -06:00

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@DasUBrot commented on GitHub (Dec 7, 2023):

Macbook Air M1 8/256 with Sonoma 14.1.2 (23B92), current version of MonitorControl as of 2023/12:
Same problem here. Macbook either does not go to sleep or wakes up a few minutes later when MonitorControl is running. Everything working fine when MonitorControl is closed.
A real shame because the program is simple to use, good-looking and really useful.

@DasUBrot commented on GitHub (Dec 7, 2023): Macbook Air M1 8/256 with Sonoma 14.1.2 (23B92), current version of MonitorControl as of 2023/12: Same problem here. Macbook either does not go to sleep or wakes up a few minutes later when MonitorControl is running. Everything working fine when MonitorControl is closed. A real shame because the program is simple to use, good-looking and really useful.

gitea-mirror commented

2026-05-05 06:19:18 -06:00

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@waydabber commented on GitHub (Oct 3, 2024):

Not sure whether this is still an issue. You can check what app prevents sleeping in Activity Monitor or by entering this in Terminal:

pmset -g assertions

Normally the app should not prevent sleep (there is nothing in it that should interfere afaik).

@waydabber commented on GitHub (Oct 3, 2024): Not sure whether this is still an issue. You can check what app prevents sleeping in Activity Monitor or by entering this in Terminal: `pmset -g assertions` Normally the app should not prevent sleep (there is nothing in it that should interfere afaik).