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Re:HDMI Firewall by alin23 on Tuesday June 21, 2022 @04:58PM (#31829043)
Well, unfortunately that will never happen because the app would need a full rewrite using DirectX and WinAPI.

Fortunately there’s an open source alternative called TwinkleTray: https://github.com/xanderfrangos/twinkle-tray

Someone determined enough could add adaptive brightness to it. You can even use Lunar’s wireless ambient light sensor [1] for that as it’s simply sending lux values through Server Sent Events [2]

[1] https://lunar.fyi/sensor

[2] https://github.com/alin23/lunarsensor

Re:HDMI Firewall by mintplant on Tuesday June 21, 2022 @05:37PM (#31829393)
There's also Monitorian for Windows: https://github.com/emoacht/Monitorian
Re:HDMI Firewall by jorvi on Tuesday June 21, 2022 @09:03PM (#31830905)
And for a more advanced feature set, ClickMonitorDDC.

Sadly it is no longer hosted by the company where the developer worked. I mailed them, asking where the dev went or if they could put me in contact with him so he could release the source code. Regretfully I never got a response.