Calibration impossible. BenQ EX321UX

[Wise Pds]

Hello, everyone.
I need your help.
I bought the Benq EX321UX monitor. 4k IPS 32, 99% Adobe RGB, Mini LED, Quantum dots, 1152 zones.

I am trying to calibrate it with 1i Display Pro, which I have used to calibrate all my monitors without any problems. Displaycal and Calibrite used as calibration software.

I’ve tried everything, all modes, all types of panels in DisplayCal, HDMI, DP, I’ve used AI (Grok) to ask, and the result is always the same: maximum +/- 70% Adobe RGB. The color space is always limited to SRGB. In fact, I have an ACER X32FP 4k IPS Mini LED 576 zones Q dots next to it, and I calibrate it perfectly and it gives 99.9% Adobe RGB and DCI-P3 with the same config.

I’ve been at it for 3 days and have done more than 30 calibrations, and the result is always the same: 70% maximum Adobe RGB. I have tested all kinds of correction inside Displaycal (For my exact model, for LCD RGB, for WHITE LED, etc…)

Does anyone know what could be happening?
Thank you.

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[DaniJ]

Bad profile loaded in OS X that applies to the whole desktop?

[DaniJ]

*Windows

[Ben]

Sorry it is the wrong version of displaycal for Windows.   The latish version is for python 3 support and works good on Macs and Linux.   It should work on windows but it needs testers.   The author reads bug reports from the github https://github.com/eoyilmaz/displaycal-py3.    This forum is for the old 3.8.9.1 version.  It works stable in Windows.   I think you should use 3.8.9.1 Displaycal.

Less than ideal gamut could be the 3d profile is applied 2 times.   Cause is unknown.

[Ben]

Digging showed this issue almost fixed.    The developers are active.  https://github.com/eoyilmaz/displaycal-py3/issues/592   .    work carefully.

[Wise Pds]

I have tested multiple windows profiles, but display cal loader is the boss

[Wise Pds]

I have tested both versions, classic and the new phyton version.

New version is more unestable by the way.

[Wise Pds]

But in the original version i have the same problem.

[Wise Pds]

Any advice or way to calibrate a MINI-LED Quatum DOT 2025 PANNEL ME315QM-NM1?

https://www.displayspecifications.com/es/model/14ef3885

There are a few fake reviewers on youtube.. i ask them and anybody can tell me what profile or configuration they used for the calibration (it’s all a lie, they don’t calibrate anything).

I have calibrated more than 15 monitors in about 15 years… this is the first monitor i can’t.

[DaniJ]

Display a 100% green patch in a simple app like Paint and play with the monitor/display/gpu settings until you see the very saturated AdobeRGB specific green.

[Vincent]

Display a 100% green patch in a simple app like Paint and play with the monitor/display/gpu settings until you see the very saturated AdobeRGB specific green.

+1.

If it looks sRGB green then you have enabled some sRGB simulation on display itself, on GPU by some vendor app (like some asus laptops) or maybe you have enable ACM in Windows 11 (linked to HDR or fake HDR display detection by Windows), or maybe W11 enabled ACM or SDR desktop on HDR container without your consent.

My bet is on the latest. Disable HDR in display (if possible) and disabe Auto color managemnet in Windows. Windows is detecting it as an HDR display, be it actually HDR or fake HDR.
Since windows detects it as HDR, which means “this display in its HDR mode expects RGB data to be encoded as Rec2020 PQ”, it reencodes sRGB-like deskop for SDR content on a Rec2020 PQ container and sends it to display. Once on display, the display reencodes these RGB data again to other RGB data in display native colorspace.
A very silly behavior… but manufacturers+MS choose this way.

Also that 86% sRGB instead of 99% sRGB seems linked to limited vs full range issue, this time for HDR. On a common IPS display this can be spotted as a unusual low contrast, but on a FALD display may be harder to notice. DisplayCAL’s HTML report on CIE a*b* plot shoud give you a hint about this since all primaries will be sligthly undersaturated vs sRGB ones.

• This reply was modified 5 months, 3 weeks ago by Vincent.

[Vincent]

One more thing:
Although it depends on actual use for that display it is recommended to choose a “single curve + matrix” profile type on a well behaved display (instead of XYZLUT): a display that after calibration looks almost perfectly additive in RGB and that has a perfect neutral grey response. It would save you for rounding errors on lots of ICC color managed applications.

Also “medium” speed or slower (instead of fast or very fast) for an i1DisplayPro should be your first guess on display of unknown quality or behavior. These means more grey calibration patches so any issue would be corrected. But don’t do this till you have solved the Windows/HDR/display configuration issues.

• This reply was modified 5 months, 3 weeks ago by Vincent.

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