From: nospam@needed.invalid   
      
   On Mon, 11/24/2025 8:43 AM, Edmund wrote:   
   > Created Monitor Profiles are not shown.   
   >   
   > Trying to create a new one and it says : a profile of this name already   
   exists.   
   >   
   > How to solve this?   
      
   You are here ?   
      
      [Picture]   
      
       https://i.postimg.cc/d0rLd87G/LM222-Settings-Color-Gnome-Color-Manager.gif   
      
   When you visit Settings : Color or so, the left hand dialog shows up.   
   The software then lazily installs "gnome-color-manager" package   
   and something in there makes the right hand display.   
      
   The ~/.local/share/icc  stores raw .icc files, without labeling   
   them in any useful way. Because these say "EDID" on them, they're   
   copied out of the monitor ROM. I have two, because the SSD was   
   shoved into two machines and picked up two monitor profiles   
   because of it.   
      
   There is /usr/libexec/colord running, which may have something   
   to do with actually changing the colors, when you change the   
   ticked profile in the Colors panel.   
      
   *******   
      
   I added Wide Gamut RGB from the canned ICC profiles already   
   on the machine. I put it underneath my monitor entry, using   
   "Add Profile", and those profiles are stored in   
      
      /usr/share/color/icc/colord/WideGamutRGB.icc   
      
   and obviously the computer is not going to like it, if   
   you attempt to overwrite those. There is likely root   
   ownership of some materials in there.   
      
   The question then, is "how do we make an Edmund.icc and store it?".   
   With a Spyder and some sort of software that comes with the   
   Spyder? We do it on Windows, and bring the .icc across.   
   And then what ?   
      
   I would be all excited, except when I selected WideGamutRGB.icc   
   and ticked it, nothing happened, and nothing happened after a reboot either.   
      
   I tried Ubuntu 25.04, and the interface in Settings is   
   even *less* developed :-)   
      
   *******   
      
   I found a general overview here. Maybe an Arch article   
   would do a better job on something like this.   
      
     https://en.wikipedia.org/wiki/Linux_color_management   
      
   Xrandr has a single point gamma adjustment possible.   
   That could be used to "turn down the blue a bit", but   
   this is hardly useful. The graphically oriented gamma   
   adjustment is better (piece-wise polynomial corrections),   
   but the NVidia control panel is missing all that stuff.   
   If there was any Lookup Table (LUT) loader, it's not   
   in evidence.   
      
     https://linux.die.net/man/1/xrandr   
      
   My first attempt at this, I "discovered"... nothing,   
   via the interface. Nothing at all :-)   
      
      Paul   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)