Failed to send DDC command (High Sierra with BenQ GW2760HS)

kfix / ddcctl

DDC monitor controls (brightness) for Mac OSX command line

GNU General Public License v3.0

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Failed to send DDC command (High Sierra with BenQ GW2760HS) #29

Closed fgimian closed 6 years ago

fgimian commented 6 years ago

I'm sorry to bother you with this, but was wondering if you had any idea why this may be happening:

fots ~ > ddcctl $ ./ddcctl -b 10 -d 1
D: NSScreen #1952343752 (1600x900 0°) 68.00 DPI
I: found 1 external display
I: polling display 1's EDID
I: got edid.serial: M3D10118SL0
I: got edid.name: BenQ GW2760HS
D: action: b: 10
D: setting VCP control #16 => 10
E: Failed to send DDC command!

Thanks so much in advance! Fotis

fgimian commented 6 years ago

I just realised the cause of my particular problem. I'm running my monitor through a Thunderbolt 2 dock which doesn't seem to work. Using a direct HDMI connection to my MacBook Pro is what is required for DDC commands to be sent correctly.

Sorry for the trouble! Fotis