[GH-ISSUE #762] Better support for BetterDummy + Sidecar, Airplay or DisplayLink #494

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opened 2026-05-05 06:08:09 -06:00 by gitea-mirror · 4 comments

gitea-mirror commented

2026-05-05 06:08:09 -06:00

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Originally created by @waydabber on GitHub (Nov 2, 2021).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/762

Originally assigned to: @waydabber on GitHub.

Dummies including BetterDummy is now intentionally skipped from controlling displays (Display.isDummy checks).

Virtual Displays (like Sidecar, Airplay, DisplayLink displays) that support only shade control are banned from control when in mirrored setups (DisplayManager.isDisqualifiedFromShade).

Each of these factors are prohibiting BetterDummy mirrored Virtual Displays to benefit from shade based dimming.

An exception must be implemented to solve this issue.

Originally created by @waydabber on GitHub (Nov 2, 2021). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/762 Originally assigned to: @waydabber on GitHub. Dummies including [BetterDummy](https://github.com/waydabber/BetterDummy) is now intentionally skipped from controlling displays (`Display.isDummy` checks). Virtual Displays (like Sidecar, Airplay, DisplayLink displays) that support only shade control are banned from control when in mirrored setups (`DisplayManager.isDisqualifiedFromShade`). Each of these factors are prohibiting [BetterDummy](https://github.com/waydabber/BetterDummy) mirrored Virtual Displays to benefit from shade based dimming. An exception must be implemented to solve this issue.

gitea-mirror

2026-05-05 06:08:09 -06:00

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gitea-mirror commented

2026-05-05 06:08:15 -06:00

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@Fariusz commented on GitHub (Feb 8, 2022):

Should it work at this point? I use displaylink and BetterDummy.

@Fariusz commented on GitHub (Feb 8, 2022): <img width="699" alt="Zrzut ekranu 2022-02-8 o 22 38 26" src="https://user-images.githubusercontent.com/61850108/153079994-bfb3d483-dfbb-49fd-871b-cc2fdd32e3b3.png"> Should it work at this point? I use displaylink and BetterDummy.

gitea-mirror commented

2026-05-05 06:08:18 -06:00

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@waydabber commented on GitHub (Feb 9, 2022):

Hmm. Yes, BetterDummy->Sidecar/DisplayLink mirrored display brightness control via shading should be working in the latest version under Monterey.

@waydabber commented on GitHub (Feb 9, 2022): Hmm. Yes, BetterDummy->Sidecar/DisplayLink mirrored display brightness control via shading should be working in the latest version under Monterey.

gitea-mirror commented

2026-05-05 06:08:20 -06:00

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@Fariusz commented on GitHub (Feb 10, 2022):

How about Big Sur? Should it work as well?

@Fariusz commented on GitHub (Feb 10, 2022): How about Big Sur? Should it work as well?

gitea-mirror commented

2026-05-05 06:08:24 -06:00

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@waydabber commented on GitHub (Feb 10, 2022):

Probably should, but never tried it. :)

The No Control / unspecified control status is interesting though, I did program the app to show that message as a last resort - it seems like the app just has no idea what to do with a combination of DisplayLink and BetterDummy on Intel.

A few questions:

Are you using the latest version of the app?
If you do not enable BetterDummy, does the app work?
If you try BetterDummy + a naitve (non-displaylink) display, does the app work?

What might help is if you could provide me with the console log of the app during startup, when the display detection is done. Here is how to do that: https://github.com/MonitorControl/MonitorControl/discussions/851

@waydabber commented on GitHub (Feb 10, 2022): Probably should, but never tried it. :) The No Control / unspecified control status is interesting though, I did program the app to show that message as a last resort - it seems like the app just has no idea what to do with a combination of DisplayLink and BetterDummy on Intel. A few questions: - Are you using the latest version of the app? - If you do not enable BetterDummy, does the app work? - If you try BetterDummy + a naitve (non-displaylink) display, does the app work? What might help is if you could provide me with the console log of the app during startup, when the display detection is done. Here is how to do that: https://github.com/MonitorControl/MonitorControl/discussions/851

gitea-mirror referenced this issue

2026-05-05 07:04:41 -06:00

[PR #494] [CLOSED] Add Korean translations #1101