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I am an Ubuntu 22.04.2 LTS user. I enjoy using linux distributions, but I still consider myself a novice in using terminal commands. My laptop is an ASUSTeK COMPUTER INC. Processor: Z450LA. Intel® Core™ i3-4005U CPU @ 1.70GHz × 4. Graphics: desktop Intel® HD Graphics 4400 (HSW GT2).

Previously used this same machine with Ubuntu 20.04.6. I upgraded to the new version of Ubuntu recently.

I have always used xcalib to invert the colors of my screen.

So now that I have upgraded my computer system I went to install xcalib using: ``sudo apt-get install xcalib``` Everything runs fine.

But the command I always use, xcalib -invert -alter, or xcalib -i -a`` didn't work, and the following output came up: Error - unsupported ramp size 0```

I tried following what was in this answer: xcalib error - unsupported ramp size

First I tried these steps: https://askubuntu.com/a/1087465/1705480 There was no solution with that. Actually if I try: xcalib -i -a , nothing happened.

Then I tried these steps: https://askubuntu.com/a/945565/1705480 And still nothing happened. The screen is still the same colors.

Truthfully, the only change is that I now have xcalib 0.10.0 installed and cloned from GitHub, and if I type any incomplete commands, like xcalib -i, I get the output: Warning - Unable to read file ''

What can I do to run xcalib correctly on my notebook and invert the colors on my screen?

Translated with www.DeepL.com/Translator (free version)

Dan Ben-Hur S. Oliveira
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    https://github.com/OpenICC/xcalib 0.10 was last modified 9-10 years ago, I would not expect it to work - especially with 22.04 (which introduced a new way of driving the display). – Hannu Jun 16 '23 at 18:53
  • Welcome to AskUbuntu. I think disabling Wayland make it work, if xcalib was working on 20.04 without problems. – Sadaharu Wakisaka Jun 20 '23 at 22:43
  • @Hannu, according to git log, last commit was on 2023-01-12, and the related to code changes commit is dated on 2019-01-12. Moreover, xcalib works flawlessly on most of my setups, including Ubuntu 22.04. The probable reason has been stated above: Wayland doesn't support a lot features of Xorg/X11, therefore switching to Xorg might resolve the isssue. – Exterminator13 Jul 19 '23 at 14:22
  • Have you resolved the issue yet? If no, it would be nice to know your video driver setup! What inxi -Gx tells you? – Exterminator13 Jul 19 '23 at 14:24

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