Thank you @kofa, for pointing this out. I also noticed this reply further down in your thread:
If I do:
./iccDumpProfile 'CG279X(35945120)10Display-100-D65.icc'
I get:
Profile: 'CG279X(35945120)10Display-100-D65.icc'
Profile ID: Profile ID not calculated.
Size: 8480(0x2120) bytes
Header
------
Attributes: Reflective | Glossy
Cmm: Unknown 'MSFT' = 4D534654
Creation Date: 1/27/2022 20:03:28
Creator: 'Eizo' = 45697A6F
Data Color Space: RgbData
Flags EmbeddedProfileFalse | UseAnywhere
PCS Color Space: XYZData
Platform: Microsoft
Rendering Intent: Perceptual
Type: DisplayClass
Version: 4.20
Illuminant: X=0.9642, Y=1.0000, Z=0.8249
Profile Tags
------------
Tag ID Offset Size
---- ------ ------ ----
profileDescriptionTag 'desc' 276 172
copyrightTag 'cprt' 448 152
chromaticAdaptationTag 'chad' 600 44
mediaWhitePointTag 'wtpt' 644 20
luminanceTag 'lumi' 664 20
redColorantTag 'rXYZ' 684 20
greenColorantTag 'gXYZ' 704 20
blueColorantTag 'bXYZ' 724 20
Unknown 'vcgt' = 76636774 'vcgt' 744 1554
redTRCTag 'rTRC' 2300 2060
greenTRCTag 'gTRC' 4360 2060
blueTRCTag 'bTRC' 6420 2060
Where I find:
Rendering Intent: Perceptual
Is that the verdict? The calibration result icc profile for an EIZO CG279X using their ColorNavigator7 software hard codes Rendering Intent: Perceptual? (I calibrate using Windows dual boot, but prefer Linux, so I transfer the monitor profile icc result to Debian Gnome Color management). Calibrated state is stored semi-persistently in monitor.
If I do:
./iccDumpProfile 'CG279X(35945120)10Display-100-D65.icc' ALL
I get several ‘LUTs’ but I do not know what to look for.
On the input side I am using Canon 5D mk IV with RT | Color tab | Color management | Auto matched color profile selected. This point to ‘Canon EOS 5D Mark IV.dcp’.
Edit: Are color profiles with multiple rendering intent rare? This not discussed very often, as I see it.