[GH-ISSUE #383] Benq EW2780U not supported #301

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opened 2026-05-05 05:43:08 -06:00 by gitea-mirror · 3 comments

gitea-mirror commented

2026-05-05 05:43:08 -06:00

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Originally created by @jondarrer on GitHub (Feb 1, 2021).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/383

Checklist

[x ] I have searched for existing issues
[x ] I have looked through the Monitor Troubleshooting wiki
[ x] I have updated MonitorControl to the latest version

Describe the issue
The Benq EW2780U has DDC switched on but the monitor appears as not supported and none of the actions (brightness or volume) work.

Expected behavior
The Benq EW2780U to be recognised as Benq EW2780U and all the actions (brightness or volume) to work.

Screenshots

Other information

Having run ddcctl as suggested in the the Monitor Troubleshooting wiki, I found the following failures on each command (here setting the brightness to 1):

$ ddcctl -d 1 -b 1
D: CGDisplay D9F5565C-F61A-F34E-3D19-FC1626C9B248 dispID(#1) (1920x1080 0°) HiDPI
I: found 1 external display
E: Failed to parse WindowServer's preferences! (/Library/Preferences/com.apple.windowserver.plist)
E: Failed to acquire framebuffer device for display

Environment Information (please complete the following information):

macOS version: 11.1
MonitorControl version: 2.1.0 (Build 721)
Monitor(s): Benq EW2780U
Mac model: Mac mini (M1, 2020)
Monitor Cable(s)/Connection(s): HDMI 2.0

Originally created by @jondarrer on GitHub (Feb 1, 2021). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/383 **Checklist** - [x ] I have searched for existing issues - [x ] I have looked through [the Monitor Troubleshooting wiki](https://github.com/MonitorControl/MonitorControl/wiki/Monitor-Troubleshooting) - [ x] I have updated MonitorControl to the latest version **Describe the issue** The [Benq EW2780U](https://www.benq.eu/en-uk/monitor/entertainment/ew2780u.html) has **DDC switched on** but the monitor appears as not supported and none of the actions (brightness or volume) work. **Expected behavior** The Benq EW2780U to be recognised as **Benq EW2780U** and all the actions (brightness or volume) to work. **Screenshots** <img width="203" alt="Screenshot 2021-02-01 at 18 44 22" src="https://user-images.githubusercontent.com/5214011/106503886-2018eb80-64be-11eb-95a0-5f7bb35f86b6.png"> <img width="681" alt="Screenshot 2021-02-01 at 18 45 14" src="https://user-images.githubusercontent.com/5214011/106503903-25763600-64be-11eb-99b3-dfabcebe8442.png"> **Other information** Having run `ddcctl` as suggested in the [the Monitor Troubleshooting wiki](https://github.com/MonitorControl/MonitorControl/wiki/Monitor-Troubleshooting), I found the following failures on each command (here setting the brightness to 1): ```bash $ ddcctl -d 1 -b 1 D: CGDisplay D9F5565C-F61A-F34E-3D19-FC1626C9B248 dispID(#1) (1920x1080 0°) HiDPI I: found 1 external display E: Failed to parse WindowServer's preferences! (/Library/Preferences/com.apple.windowserver.plist) E: Failed to acquire framebuffer device for display ``` **Environment Information (please complete the following information):** - macOS version: 11.1 - MonitorControl version: 2.1.0 (Build 721) - Monitor(s): Benq EW2780U - Mac model: Mac mini (M1, 2020) - Monitor Cable(s)/Connection(s): HDMI 2.0

gitea-mirror

2026-05-05 05:43:08 -06:00

closed this issue
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gitea-mirror commented

2026-05-05 05:43:15 -06:00

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@jondarrer commented on GitHub (Feb 1, 2021):

Okay, just realised this is most likely down to this issue around M1 support in general #323.

@jondarrer commented on GitHub (Feb 1, 2021): Okay, just realised this is most likely down to this issue around M1 support in general #323.

gitea-mirror commented

2026-05-05 05:43:17 -06:00

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@FraggyFred commented on GitHub (Feb 11, 2021):

Hi all
For your info
I have a MBP TouchBar (Intel) and the same monitor that I ca'nt control
The monitor is connected via : usb-c hub --> miniDP to DP cable
Connecting via HDMI does not allow to access full resolution of the monitor, thus an option for me
I'm waiting for a usb-c to DP cable for another try

Rgds

@FraggyFred commented on GitHub (Feb 11, 2021): Hi all For your info I have a MBP TouchBar (Intel) and the same monitor that I ca'nt control The monitor is connected via : usb-c hub --> miniDP to DP cable Connecting via HDMI does not allow to access full resolution of the monitor, thus an option for me I'm waiting for a usb-c to DP cable for another try Rgds

gitea-mirror commented

2026-05-05 05:43:20 -06:00

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Owner

@JoniVR commented on GitHub (Feb 13, 2021):

#323

@JoniVR commented on GitHub (Feb 13, 2021): #323

gitea-mirror referenced this issue

2026-05-05 07:04:17 -06:00

[PR #301] [CLOSED] Sync brightness #1085