(Solved) Any "xgamma" alternatives for Linux?

[Logan]

Hi friends.
I tried "xgamma" on Linux, it can change gamma for individual color channels, and white point for all channels. But I want the opposite, I want to change gamma for all channels(this can be done), and change white point for individual color channels(xgamma cannot). I also tried "redshift" which supposedly can change color temperature(close to change white point for different color channels), but that program don't work on my system at all.
But I want something more powerful, just like the "Intel Graphic control panel" on Windows, which allow setting brightness+contrast+gamma for each RGB channel.
Does anyone know a program that meet my needs?
Thanks a lot.

[thinkfat]

Just to clarify, when you say "change whitepoint of individual channel", you mean change the maximum brightness of an individual channel, without changing its gamma mapping?

[Twoflower]

Have you tried some alternative methods in redshift?

Code: [Select]

$ redshift -m list
Available adjustment methods:
  drm
  randr
  vidmode
  dummy

Specify colon-separated options with `-m METHOD:OPTIONS'.
Try `-m METHOD:help' for help.


[Marco]

So do you want to adjust brightness or contrast per colour?

xcalib might be able to do it, depending on your X video driver.

Honestly, Linux on the desktop is atrophying a bit (outside of ChromeOS, but that's in its own world entirely). X11 has no maintainers and Wayland colour profile support still under heavy development.

[Logan]

Just to clarify, when you say "change whitepoint of individual channel", you mean change the maximum brightness of an individual channel, without changing its gamma mapping?

No, I don't mean to clip the highlights.

Have you tried some alternative methods in redshift?

Code: [Select]

$ redshift -m list
Available adjustment methods:
  drm
  randr
  vidmode
  dummy

Specify colon-separated options with `-m METHOD:OPTIONS'.
Try `-m METHOD:help' for help.


It said "no more methods to try" in the error message, I guess it automatically tried all of them? I'll use your code to try later, thanks.

So do you want to adjust brightness or contrast per colour?

xcalib might be able to do it, depending on your X video driver.

Does that apply to the whole desktop? I saw that command before, but on Windows an ICC calibration only apply to media files.

However if you're particularly lucky you might check out whatever software utilities exist for the GPU used in the machines to be administered.
NVIDIA, ATI, Intel may have some utility / control panel type of software to work with their chips particularly though not necessarily  if you're using their drivers.

That's exactly the function I want, but sadly on Linux there's no such thing for my Intel iGPU.

[Logan]

xcalib might be able to do it, depending on your X video driver.

I can't believe this works, and for whole display, not only specific programs.
Thanks a lot!