[GH-ISSUE #1362] Software and Hardware Dimming not working #774

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opened 2026-05-05 06:40:02 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 06:40:02 -06:00

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Originally created by @mehapps on GitHub (Apr 16, 2023).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1362

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

I plugged in a new display (Lenovo 4434-HE1) to my Mac with a Thunderbolt 2 to DVI-D cable. The same cable works fine to control my BenQ monitor, but doesn't control the Lenovo. I thought: No problem, I'll just use software dimming. However, software dimming is not working on either monitor.

Expected behavior

Software dimming to work as intended.

Anything else?

I am using a Mac with OCLP, don't know if that has anything to do with it.

Environment Information (please complete the following information)

- macOS version: 13.3.1
- Mac model: Mac mini (Mid 2011)
- MonitorControl version: 4.1.0 build 7034
- Monitor(s): BenQ RL2455 and Lenovo 4434-HE1
- Monitor Cable(s)/Connection(s): HDMI to BenQ and Thunderbolt 2 to DVI to Lenovo
- Apple Silicon/M1 (yes or no): No

Originally created by @mehapps on GitHub (Apr 16, 2023). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1362 ### 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 I plugged in a new display (Lenovo 4434-HE1) to my Mac with a Thunderbolt 2 to DVI-D cable. The same cable works fine to control my BenQ monitor, but doesn't control the Lenovo. I thought: No problem, I'll just use software dimming. However, software dimming is not working on either monitor. ### Expected behavior Software dimming to work as intended. ### Anything else? I am using a Mac with OCLP, don't know if that has anything to do with it. ### Environment Information (please complete the following information) ```markdown - macOS version: 13.3.1 - Mac model: Mac mini (Mid 2011) - MonitorControl version: 4.1.0 build 7034 - Monitor(s): BenQ RL2455 and Lenovo 4434-HE1 - Monitor Cable(s)/Connection(s): HDMI to BenQ and Thunderbolt 2 to DVI to Lenovo - Apple Silicon/M1 (yes or no): No ```

gitea-mirror closed this issue

2026-05-05 06:40:05 -06:00

gitea-mirror commented

2026-05-05 06:40:07 -06:00

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@waydabber commented on GitHub (May 31, 2023):

How did you try enabling software dimming? it might be that the patched GPU drivers do not support gamma table manipulation properly. In this case you can try disabling that as well for overlay dimming which should work as a last resort.

@waydabber commented on GitHub (May 31, 2023): How did you try enabling software dimming? it might be that the patched GPU drivers do not support gamma table manipulation properly. In this case you can try disabling that as well for overlay dimming which should work as a last resort.