Not working on Dell S2721QS

[alexpanait]

Hello,

Thanks for making the time writing this to help other people. I just tried this on a Macbook Pro 15 2017 (Big Sur) with a Dell S2721QS and it seems that in the monitor menu I still see YPbPr as color format and there are no visible improvements.

Here is the patched file:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>DisplayProductName</key>
    <string>DELL S2721QS (EDID override)</string>
    <key>edid-patches</key>
    <array>
        <dict>
            <key>offset</key>
            <integer>131</integer>
            <key>data</key>
            <data>wQ==</data>
        </dict>
    </array>
</dict>
</plist>

I was wondering if you have any suggestions or other things that I could try. Thank you!

Update: I'm using a HDMI cable with an Apple Multiport Adapter.

[mbruggmann]

Can you verify if the override is active in OSX? If you go to About this Mac > Displays in the menu bar while the screen is connected, does it say DELL S2721QS (EDID override) or DELL S2721QS?

[alexpanait]

Can you verify if the override is active in OSX? If you go to About this Mac > Displays in the menu bar while the screen is connected, does it say DELL S2721QS (EDID override) or DELL S2721QS?

It was saying DELL S2721QS (EDID override) but in the monitor menu it was still YPbPr. I tried with a DP cable instead of adapter + HDMI and now it's RGB.

[mbruggmann]

Alright, I see. Could be that it's the multiport adapter that is messing with it, or Big Sur. But happy that you found a solution!

[alexpanait]

Alright, I see. Could be that it's the multiport adapter that is messing with it, or Big Sur. But happy that you found a solution!

I am pretty sure it's from the adapter. Thank you for your help!