github-starred/MonitorControl

Fork 0

mirror of https://github.com/MonitorControl/MonitorControl.git synced 2026-05-15 14:15:55 -06:00

garbled screen when DDC is enabled #810

New issue

Closed

opened 2026-05-05 06:44:02 -06:00 by gitea-mirror · 8 comments

gitea-mirror commented

2026-05-05 06:44:02 -06:00

Owner

Originally created by @Wyral on GitHub (Sep 16, 2023).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1432

Before opening the issue, have you...?

Searched for existing issues
Looked through the wiki
Updated MonitorControl to the latest version (if applicable)

Describe the bug

When changing the screen brightness and open things, the screen turns into black white beams.

Steps to reproduce

Open MonitorControl
press wildly the shortcut for screen brightness
open settings, and browse a little bit through (while still pressing the brightness buttons) [1]
See the result [2]

[1]
https://github.com/MonitorControl/MonitorControl/assets/104320525/95d649e8-97ae-456d-8ca2-a100a71e2c21

[2]
https://github.com/MonitorControl/MonitorControl/assets/104320525/93d2dc77-461c-419f-a696-48696e4ecfe3
https://github.com/MonitorControl/MonitorControl/assets/104320525/bbe17a6b-7541-41d4-9232-162950d1d595
https://github.com/MonitorControl/MonitorControl/assets/104320525/1944a5e0-5460-4e84-8d09-d746b9641f63

Expected behavior

Work with my Mac normally

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: 14.0 (23A339)
- Mac model: Mac mini M1, 2020
- MonitorControl version: 4.2.0 Build 7048
- Monitor(s): 1
- Apple Silicon/M1 (yes or no): yes

Originally created by @Wyral on GitHub (Sep 16, 2023). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1432 ### Before opening the issue, have you...? - [X] Searched for existing issues - [X] Looked through [the wiki](https://github.com/MonitorControl/MonitorControl/wiki) - [X] Updated MonitorControl to the latest version (if applicable) ### Describe the bug When changing the screen brightness and open things, the screen turns into black white beams. ### Steps to reproduce 1. Open MonitorControl 2. press wildly the shortcut for screen brightness 3. open settings, and browse a little bit through (while still pressing the brightness buttons) [1] 4. See the result [2] [1] https://github.com/MonitorControl/MonitorControl/assets/104320525/95d649e8-97ae-456d-8ca2-a100a71e2c21 [2] https://github.com/MonitorControl/MonitorControl/assets/104320525/93d2dc77-461c-419f-a696-48696e4ecfe3 https://github.com/MonitorControl/MonitorControl/assets/104320525/bbe17a6b-7541-41d4-9232-162950d1d595 https://github.com/MonitorControl/MonitorControl/assets/104320525/1944a5e0-5460-4e84-8d09-d746b9641f63 ### Expected behavior Work with my Mac normally ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: 14.0 (23A339) - Mac model: Mac mini M1, 2020 - MonitorControl version: 4.2.0 Build 7048 - Monitor(s): 1 - Apple Silicon/M1 (yes or no): yes ```

gitea-mirror

2026-05-05 06:44:02 -06:00

closed this issue
added the
known Issue
label

gitea-mirror commented

2026-05-05 06:44:08 -06:00

Author

Owner

@waydabber commented on GitHub (Sep 20, 2023):

I assume you are using HDMI. MonitorControl does not support the M1 and entry level M2 Mini's HDMI port. You can however use BetterDisplay. If you are using USB-C/DP then your display might not be DDC compatible.

@waydabber commented on GitHub (Sep 20, 2023): I assume you are using HDMI. MonitorControl does not support the M1 and entry level M2 Mini's HDMI port. You can however use [BetterDisplay](https://github.com/waydabber/BetterDisplay#readme). If you are using USB-C/DP then your display might not be DDC compatible.

gitea-mirror commented

2026-05-05 06:44:09 -06:00

Author

Owner

@Wyral commented on GitHub (Sep 21, 2023):

Yes, I am using HDMI.

@Wyral commented on GitHub (Sep 21, 2023): Yes, I am using HDMI.

gitea-mirror commented

2026-05-05 06:44:10 -06:00

Author

Owner

@waydabber commented on GitHub (Sep 21, 2023):

I'll just keep it here as a Known issue - although it's in the compatibility section but others will probably also search for this among issues.

@waydabber commented on GitHub (Sep 21, 2023): I'll just keep it here as a Known issue - although it's in the compatibility section but others will probably also search for this among issues.

gitea-mirror commented

2026-05-05 06:44:12 -06:00

Author

Owner

@Addlai commented on GitHub (Sep 28, 2023):

Same problem with Mac Mini 2020 M1 and LG 43in 4K Ultrafine over HDMI.

@Addlai commented on GitHub (Sep 28, 2023): Same problem with Mac Mini 2020 M1 and LG 43in 4K Ultrafine over HDMI.

gitea-mirror commented

2026-05-05 06:44:13 -06:00

Author

Owner

@waydabber commented on GitHub (Oct 6, 2023):

@Addlai - please use BetterDisplay if you want DDC control over HDMI for these Macs. I do not plan to update MonitorControl with HDMI support. All DDC features are free in BetterDisplay.

@waydabber commented on GitHub (Oct 6, 2023): @Addlai - please use [BetterDisplay](https://betterdisplay.pro) if you want DDC control over HDMI for these Macs. I do not plan to update MonitorControl with HDMI support. All DDC features are free in BetterDisplay.

gitea-mirror commented

2026-05-05 06:44:14 -06:00

Author

Owner

@PhDLuffy commented on GitHub (Oct 30, 2023):

I assume you are using HDMI. MonitorControl does not support the M1 and entry level M2 Mini's HDMI port. You can however use BetterDisplay. If you are using USB-C/DP then your display might not be DDC compatible.

Mac mini M1，MacOS 13.4.1，MC 4.2.0，AOC U2790B

mac hdmi to hdmi, volume bar work but sound no change

mac typec to hdmi, volume bar work but sound no change

mac typec to dp, volume bar work and sound control work perfactyly

i think for the hdmi, the ddc control signal may not come to the monitor,

the DP works perfactly.

@PhDLuffy commented on GitHub (Oct 30, 2023): > I assume you are using HDMI. MonitorControl does not support the M1 and entry level M2 Mini's HDMI port. You can however use [BetterDisplay](https://github.com/waydabber/BetterDisplay#readme). If you are using USB-C/DP then your display might not be DDC compatible. Mac mini M1，MacOS 13.4.1，MC 4.2.0，AOC U2790B mac hdmi to hdmi, volume bar work but sound no change mac typec to hdmi, volume bar work but sound no change mac typec to dp, volume bar work and sound control work perfactyly i think for the hdmi, the ddc control signal may not come to the monitor, the DP works perfactly.

gitea-mirror commented

2026-05-05 06:44:16 -06:00

Author

Owner

@metehandemir commented on GitHub (Nov 26, 2023):

I faced the same problem once with the Mac Mini 2018 i5.

@metehandemir commented on GitHub (Nov 26, 2023): I faced the same problem once with the Mac Mini 2018 i5.

gitea-mirror commented

2026-05-05 06:44:17 -06:00

Author

Owner

@waydabber commented on GitHub (Nov 26, 2023):

Hi @metehandemir - you can use BetterDisplay for HDMI support for the 2018 Mini (that is currently the only app that supports Intel 2018 HDMI DDC).

@waydabber commented on GitHub (Nov 26, 2023): Hi @metehandemir - you can use [BetterDisplay](https://github.com/waydabber/BetterDisplay#readme) for HDMI support for the 2018 Mini (that is currently the only app that supports Intel 2018 HDMI DDC).