[GH-ISSUE #108] Doesn't controll imac in target mode #80

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opened 2026-05-05 04:59:16 -06:00 by gitea-mirror · 4 comments

gitea-mirror commented

2026-05-05 04:59:16 -06:00

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Originally created by @Voitus on GitHub (Jun 28, 2019).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/108

Hi,

Great app. Just built hackintosh and I'm using old imac 27 inch 2009 as monitor in target mode via displayport to minidsplayport. App controls other 2 monitors but not imac :-(

Originally created by @Voitus on GitHub (Jun 28, 2019). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/108 Hi, Great app. Just built hackintosh and I'm using old imac 27 inch 2009 as monitor in target mode via displayport to minidsplayport. App controls other 2 monitors but not imac :-(

gitea-mirror closed this issue

2026-05-05 04:59:18 -06:00

gitea-mirror commented

2026-05-05 04:59:21 -06:00

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@JoniVR commented on GitHub (Aug 19, 2019):

Are you sure ddc is supported on that?
Try installing a tool called ddcctl (search on Github) and then pasting the output.

@JoniVR commented on GitHub (Aug 19, 2019): Are you sure ddc is supported on that? Try installing a tool called ddcctl (search on Github) and then pasting the output.

gitea-mirror commented

2026-05-05 04:59:24 -06:00

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@JoniVR commented on GitHub (Sep 15, 2019):

Can you test v1.7.0 and report back please?

@JoniVR commented on GitHub (Sep 15, 2019): Can you test v1.7.0 and report back please?

gitea-mirror commented

2026-05-05 04:59:26 -06:00

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@JoniVR commented on GitHub (Oct 13, 2019):

Closing for now since no response.

@JoniVR commented on GitHub (Oct 13, 2019): Closing for now since no response.

gitea-mirror commented

2026-05-05 04:59:29 -06:00

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@n8gray commented on GitHub (Jan 23, 2020):

I've got the same issue. ddcctl doesn't seem to work with it. For example, here's the output of ddcctl -d 1 -b \?

D: NSScreen #69678537 (2560x1440 0°) 109.00 DPI
I: found 1 external display
I: polling display 1's EDID
I: got edid.name: Color LCD
D: action: b: ?
D: querying VCP control: #16 =?
E: No data after 10 tries! 
E: DDC send command failed!
E: VCP control #16 (0x10) = current: 0, max: 0

Everything I try ends up with E: DDC send command failed!

😢

@n8gray commented on GitHub (Jan 23, 2020): I've got the same issue. `ddcctl` doesn't seem to work with it. For example, here's the output of `ddcctl -d 1 -b \?` ``` D: NSScreen #69678537 (2560x1440 0°) 109.00 DPI I: found 1 external display I: polling display 1's EDID I: got edid.name: Color LCD D: action: b: ? D: querying VCP control: #16 =? E: No data after 10 tries! E: DDC send command failed! E: VCP control #16 (0x10) = current: 0, max: 0 ``` Everything I try ends up with `E: DDC send command failed!` :cry:

gitea-mirror referenced this issue

2026-05-05 07:02:44 -06:00

[PR #80] [MERGED] Update DDC.swift and fix build number script. #1034