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My M1 Mini is running Monterey beta 9 and my Dell U2720Q now defaults to RGB (USB-C To USB-C) and it looks great! Before I switched to Monterey it was always in YPbPr mode. Not sure which beta version finally fixed it but Let's hope it stays this way. I haven't tinkered with any plist or scripts...
 
The plist edit actually worked for my Dell S3221QS, but now it stopped working after updating to Monterey 12.0.1 (had no issues on all Monterey beta versions before this), which is extremely disappointing to say the least.

Does anyone have similar problems or even know of a way to fix it again?
 
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The plist edit actually worked for my Dell S3221QS, but now it stopped working after updating to Monterey 12.0.1 (had no issues on all Monterey beta versions before this), which is extremely disappointing to say the least.

Does anyone have similar problems or even know of a way to fix it again?
Could you elaborate in detail what is the problem with Monterey and plist edit? You mean there is no plist file or its contents are different or it is the same but even after editing not working (you remember to reboot or at least log off after editing to make it work)? Also are you editing plist file manually or using some app for that? Anyway, I would start doing plist edit manually to make sure it is done correctly. If that does not help, maybe you could post your plist file here and I'd take a look at it.
 
Could you elaborate in detail what is the problem with Monterey and plist edit? You mean there is no plist file or its contents are different or it is the same but even after editing not working (you remember to reboot or at least log off after editing to make it work)? Also are you editing plist file manually or using some app for that? Anyway, I would start doing plist edit manually to make sure it is done correctly. If that does not help, maybe you could post your plist file here and I'd take a look at it.
The problem is that the default values are exactly what you'd have had to change manually before, i.e. by default PixelEncoding is 0 and Range is 1, when I delete the whole file and let it be generated again. But it seems to ignore these values (or interpret them differently) as the color format is YPbPr. I've also tried to change the values to what would've been the default before (PixelEncoding 1, Range 0) , but that doesn't appear to have any effect.

I've been editing the file manually and only changed PixelEncoding and Range. Could it be that something else is also required? Thanks!
 
I've been editing the file manually and only changed PixelEncoding and Range. Could it be that something else is also required? Thanks!
BitDepth also needs to be set to 8 (it is probably 10 for yPbPr, was on my machine).
Also make sure there are not multiple display entries in the file and change them accordingly if needed.
Also check location ~/Library/Preferences and in the ByHost folder for another plist file, which is user specific and overrides the other global one. And as I said, you have to reboot or at least log off/on to make changes effective.
Let me know if that helps.
 
Just upgrade to Monterey. Still Ypbpr on macbook pro m1 & dell u2417h. Damn Apple. Can anyone help me with that?
 
Just upgrade to Monterey. Still Ypbpr on macbook pro m1 & dell u2417h. Damn Apple. Can anyone help me with that?
And you already tried editing plist to force RGB? You should find instructions for that in this thread, in case you did not test it already.
 
Just upgraded to Monterey 12.0.1 (mac mini M1) and RGB came back to my Dell U2721DE. I'm not sure about the fonts, looks sharp enough. Today, also, TinkerTool had a new update for macOS 12 compatibility, the font smoothing options are removed or i'm blind, why?!
 
Just noticed that in Monterey plist is missing LinkDescription in default but seems you can recreate it there manually, or easier way toggle HDR mode on > off and it will recreate it but you must manually set BitDepth to 8 and PixelEncoding and Range to right values too.

Seems to work fine when all needed settings are in place.
 
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I use an LG monitor which doesn't have a menu option to tell me whether it is running in Ypbpr or RGB mode. I have noticed since updating to Monterey that the display is more colourful and brighter and colours are more vibrant - reds in particular. Can I assume that RGB has kicked in where it hadn't before?
 
I use an LG monitor which doesn't have a menu option to tell me whether it is running in Ypbpr or RGB mode. I have noticed since updating to Monterey that the display is more colourful and brighter and colours are more vibrant - reds in particular. Can I assume that RGB has kicked in where it hadn't before?
Probably other way around now, so not. Or maybe you had HDR turned on before and now it is off (HDR causes washed out looking colors in desktop). Which LG you have?
Mine is 32UN880-B. Monterey colors look just like Big Sur after plist editing. But there is not huge difference with this monitor even on YPbPr.
 
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Hi All

I am the original initiator of this thread (I guess the tag makes it obvious!)

HAPPY TO REPORT that RGB is working out of the box for me, with my existing setup, on upgrading to Monterey.

The details are:

- M1 MacBook Air
- Dell U2414
- Choetech DP to USB-C Cable

The monitor automatically switched profile to MAC (instead of PC - I didn't need to toggle it), and the profile showed RGB.

When I first switched on the monitor, I could immediately "feel" the difference, even before I accessed the OSD.

The color range on the graphics in the browser definitely seem better to me.

Now I would like to switch to a 4K monitor not because I HAVE TO, but because I WANT TO (I guess I understand the benefits of higher PPI by now, for text, and feel more confident about RGB).

Thanks again guys, and if possible, please weigh in on whether the Dell S2721QS pairs well with M1, and if it's quite close to the U2720Q.

I don't have the ability to demo the monitor before buying; and I cannot return the monitor once bought, so your comments would be extremely helpful.

Again, it was a genuine pleasure interacting with everyone on this thread, and thanks for all your kind inputs and advice

Cheers & Regards
Amit
 
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Dell D6000 docking station support is broken in Monterey.
It always defaults to Ypbpr on dell U2721DE, via hdmi or DP. Was working fine on Big Sur.
It works fine in RGB mode once monitor connected via usb-c to MBP.
 
I don't know if this is related to this issue, but I have noticed I suddenly have a whole lot of display profiles for my LG 4K display that weren't available under Big Sur.

Is there any one of these I should be using for best results?

Screenshot 2021-10-27 at 09.38.00.png
 
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I use an LG monitor which doesn't have a menu option to tell me whether it is running in Ypbpr or RGB mode. I have noticed since updating to Monterey that the display is more colourful and brighter and colours are more vibrant - reds in particular. Can I assume that RGB has kicked in where it hadn't before?
Very possible. I have a LG 27UP850. I very certainly feel it's better colored than yesterday.
 
My Dell U3419W 34" ultrawide monitor is now using RGB (using USB-C) after updating my M1 Air to Monterey. It was previously YPbPr.
 
I don't know if this is related to this issue, but I have noticed I suddenly have a whole lot of display profiles for my LG 4K display that weren't available under Big Sur.

Is there any one of these I should be using for best results?View attachment 1880479
Your monitor appears to be in YPbPr mode because that is the only time SD 170M-A appears on the profile list.
That will also make colors appear more darker or saturated but most likely not as they should. Also depending on monitor there could be issues with chroma subsampling unless monitor supports 4:4:4 (below 4:4:4 there can be fuzzy text for example in certain situations).

Right profile should be LG named profile, or Display P3 should work pretty well too if your monitor support P3 colors and have functional profile for it.

In your case, I'd try plist editing to make it stay in RGB mode.
 
Screenshot 2021-10-27 at 15.23.06.png
Your monitor appears to be in YPbPr mode because that is the only time SD 170M-A appears on the profile list.
That will also make colors appear more darker or saturated but most likely not as they should. Also depending on monitor there could be issues with chroma subsampling unless monitor supports 4:4:4 (below 4:4:4 there can be fuzzy text for example in certain situations).

Right profile should be LG named profile, or Display P3 should work pretty well too if your monitor support P3 colors and have functional profile for it.

In your case, I'd try plist editing to make it stay in RGB mode.
Okay, this is interesting - as soon as I changed it from SD 170M-A to LG HDR 4K, the SD 170M-A option vanished from the list. Didn't reappear when I restarted.

Screenshot 2021-10-27 at 15.20.28.png

If I toggle the HDR checkbox, then the display switches back to SD 170M-A... which then reappears as a selectable profile in the menu.

Screenshot 2021-10-27 at 15.23.06.png

I presume this means I was affected by the YPbPr problem all this time, and now Monterey has fixed it, as this profile isn't available any more?

The LG HDR 4K and Display P3 profiles look a bit washed out to me, but I guess they are more "correct" for colour, etc?
 
Okay, this is interesting - as soon as I changed it from SD 170M-A to LG HDR 4K, the SD 170M-A option vanished from the list. Didn't reappear when I restarted.
So it was in RGB mode but since you had that SD 170M-A selected it stay on as long as you try something else which is normal way it behave.

I presume this means I was affected by the YPbPr problem all this time, and now Monterey has fixed it, as this profile isn't available any more?
Yes.

The LG HDR 4K and Display P3 profiles look a bit washed out to me, but I guess they are more "correct" for colour, etc?
Yes.
 
I guess I'll have to get used to it! Must admit, I am not noticing any difference with regards to font sharpness. Or... maybe that's my eyesight? My display is set to "looks like 2560 x 1440" (middle scale option).
 
Just upgraded to Monterey 12.0.1 (mac mini M1) and RGB came back to my Dell U2721DE. I'm not sure about the fonts, looks sharp enough. Today, also, TinkerTool had a new update for macOS 12 compatibility, the font smoothing options are removed or i'm blind, why?!
This is what i get after Monterey 12.0.1 upgrade, i don't know if fonts sharpness is visible in the screenshot
Screenshot 2021-10-27 at 23.20.19.png
 
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