[GH-ISSUE #1155] Adjust the brightness of the external display black screen via VGA connection #681

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opened 2026-05-05 06:29:42 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 06:29:42 -06:00

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Originally created by @PromiseFor on GitHub (Aug 29, 2022).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1155

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Question

When I open the app to adjust the brightness, the additional monitor goes black and then lights up again, and the brightness of the additional monitor does not change;
Is the VGA interface not supported?
Or the monitor is too old?

Originally created by @PromiseFor on GitHub (Aug 29, 2022). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1155 ### Before opening the issue, have you...? - [X] Searched for existing issues ### Question When I open the app to adjust the brightness, the additional monitor goes black and then lights up again, and the brightness of the additional monitor does not change; Is the VGA interface not supported? Or the monitor is too old?

gitea-mirror

2026-05-05 06:29:42 -06:00

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gitea-mirror commented

2026-05-05 06:29:47 -06:00

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@waydabber commented on GitHub (Sep 3, 2022):

VGA is generally supported with the right dongle but the display itself might react badly to DDC commands (not all VGA monitors support DDC as this is the case with HDMI and DisplayPort monitors as well).

@waydabber commented on GitHub (Sep 3, 2022): VGA is generally supported with the right dongle but the display itself might react badly to DDC commands (not all VGA monitors support DDC as this is the case with HDMI and DisplayPort monitors as well).