
This is a 4k 27 inch monitor made by DELL

I just want open this issue to say thank you
and let other people know it work with this montior model
@1c7 I want to buy the same display, but in doubt because of #208. (U2720Q and U2720QM seems almost the same model.)
Could you check if it works with P3 color profile?
If does not, can you try this trouble shooting?
https://github.com/MonitorControl/MonitorControl/wiki/Monitor-Troubleshooting
@ypresto OK, I would try this and let you know the result
DCI-P3, the brightness control doesn't work(from keyboard)
because I am using a Macbook Pro 2017 15 inch,
I don't have brightness control on keyboard(Physical F1-F12 key), it's on touchbar
also, Keyboard Brightness control or touchbar brightness control should only be able to change the laptop brightness, it should not affect external monitor at all.
Anyway, back to the topic.
SMPTE RAP 431-2-2007 DCI(P3) work fineOn DELL U2720QM
After changing color profile to SMPTE RAP 431-2-2007 DCI(P3)
the brightness control still work from taskbar


Display P3 work fine too
image P3 work fine too
You can't tell the brightness from screenshot.
but it does work
@ypresto if you want more testing before you buy it.
let me know
I am happy to help
it's quite expensive, cost 4099 RMB here in China
I brought it from Taobao
I can't find this setting

Thanks! I finally bought this monitor and tested combinations of settings.
https://github.com/MonitorControl/MonitorControl/issues/208#issuecomment-643726203
Now it is working very well. :tada:
Is volume control also working on your U2720Q? The brightness control is fine, but the volume control does not work on my U2720Q. The OSD window will appear to be working, but the actual volume from speakers does not change.
Most helpful comment
Thanks! I finally bought this monitor and tested combinations of settings.
https://github.com/MonitorControl/MonitorControl/issues/208#issuecomment-643726203
Now it is working very well. :tada: