[GH-ISSUE #12] Turning off brightness doesn't work #10

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opened 2026-05-05 04:42:10 -06:00 by gitea-mirror · 6 comments
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Originally created by @funbben on GitHub (Feb 16, 2018).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/12

Originally assigned to: @the0neyouseek on GitHub.

Hi, thanks for the good work. Apps works fine for Volume and Brightness on my iiyama 27" LED - B2791QSU-B1

Except that I can't dim the brightness to 0%, the progress bar is at 0%, but there is still brightness on the screen. I would say that backlight remains at 15%

Originally created by @funbben on GitHub (Feb 16, 2018). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/12 Originally assigned to: @the0neyouseek on GitHub. Hi, thanks for the good work. Apps works fine for Volume and Brightness on my iiyama 27" LED - B2791QSU-B1 Except that I can't dim the brightness to 0%, the progress bar is at 0%, but there is still brightness on the screen. I would say that backlight remains at 15%
gitea-mirror added the
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label 2026-05-05 04:42:10 -06:00
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@the0neyouseek commented on GitHub (Feb 16, 2018):

Hi @funbben,
I'm gonna have a look at this tomorrow and see if I can reproduce it

Edit: Can you tell me what your screen hud show for brightness when the slider is down at 0% ? And did you try changing the brightness only with the slider or also with the keyboard shortcuts ?

Thanks

Sent with GitHawk

<!-- gh-comment-id:366357988 --> @the0neyouseek commented on GitHub (Feb 16, 2018): Hi @funbben, I'm gonna have a look at this tomorrow and see if I can reproduce it Edit: Can you tell me what your screen hud show for brightness when the slider is down at 0% ? And did you try changing the brightness only with the slider or also with the keyboard shortcuts ? Thanks <sub>Sent with <a href="http://githawk.com">GitHawk</a></sub>
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@funbben commented on GitHub (Feb 16, 2018):

Hummm, it might not be a bug. It might be related to the way iiyama implemented brightness dimming.

The monitor OSD says brightness 0%, the only way I found to dim "no light" is to reduce constrast to 0%.

A workaround would be to implement a specific option (in preference menu). It could be called "Force brightness diming"
The program would first dim down to 0% brightness, and then could still dim down the contrast. to 0%
When turning up, it would first dim up contrast to previous setting, and then dim up the brightness.

Let me know if you want me to do other testing

<!-- gh-comment-id:366362669 --> @funbben commented on GitHub (Feb 16, 2018): Hummm, it might not be a bug. It might be related to the way iiyama implemented brightness dimming. The monitor OSD says brightness 0%, the only way I found to dim "no light" is to reduce constrast to 0%. A workaround would be to implement a specific option (in preference menu). It could be called "Force brightness diming" The program would first dim down to 0% brightness, and then could still dim down the contrast. to 0% When turning up, it would first dim up contrast to previous setting, and then dim up the brightness. Let me know if you want me to do other testing
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@the0neyouseek commented on GitHub (Feb 18, 2018):

Hi @funbben,

I've just pushed a new version of the app, please take a look as I've included an option to do just that.
If you open the new Preference Window, you can now choose the option to "Lower contrast after brightness" which will put your contrast to 0 when brightness hit zero too.

Tell me if it works for you,
Have a nice day

<!-- gh-comment-id:366532353 --> @the0neyouseek commented on GitHub (Feb 18, 2018): Hi @funbben, I've just pushed a new version of the app, please take a look as I've included an option to do just that. If you open the new Preference Window, you can now choose the option to "Lower contrast after brightness" which will put your contrast to 0 when brightness hit zero too. Tell me if it works for you, Have a nice day
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@funbben commented on GitHub (Feb 19, 2018):

Many thanks I installed the latest version, I will be testing it in a couple of days, I'm not at home for now.

<!-- gh-comment-id:366597749 --> @funbben commented on GitHub (Feb 19, 2018): Many thanks I installed the latest version, I will be testing it in a couple of days, I'm not at home for now.
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@funbben commented on GitHub (Feb 22, 2018):

I just tested, contrast control works fine, but indeed keyboard shortcut doesn't work any more (see issue #18 ) so I can't really test the combined brightness and contrat dimming

<!-- gh-comment-id:367598947 --> @funbben commented on GitHub (Feb 22, 2018): I just tested, contrast control works fine, but indeed keyboard shortcut doesn't work any more (see issue #18 ) so I can't really test the combined brightness and contrat dimming
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@falcn commented on GitHub (Feb 23, 2018):

I can confirm, it's a safety feature that many monitors implement. Dell P2715Q doesn't allow to set contrast below 25% over DDC, only manually (OSD controls). Not a bug of the app

<!-- gh-comment-id:368008226 --> @falcn commented on GitHub (Feb 23, 2018): I can confirm, it's a safety feature that many monitors implement. Dell P2715Q doesn't allow to set contrast below 25% over DDC, only manually (OSD controls). Not a bug of the app
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