Questions tagged [gamma]

Gamma or gamut is is a certain complete subset of colors. The most common usage refers to the subset of colors which can be accurately represented in a given circumstance, such as within a given color space or by a certain output device. Use this tags for questions concerning gamut/gamma on Ubuntu.

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Set gamma correction curve (not only the exponent of a power law)

xgamma and kgamma allows one to alter the gamma correction curve by changing the exponent of a power-law expression original image: Some programs and video cards allows one to alter this curve with ...
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xrandr: Failed to get size of gamma for output

Today I just turned on my PC and instantly saw the issue, my resolution was changed to 1024 x 768, so I tried multiple solutions to fix it back to 1920x1080 but none of them worked, the main problem ...
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How to change xrandr brightness without losing gamma settings?

KDE's Night Color feature I guess uses xrandr's gamma functionality, but I was hoping to adjust the brightness of my display using it. Unfortunately, doing so like this loses the "night color&...
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gamma adjustment is not working on ubuntu 21.04

I'm using dell with intel graphics I tried xgamma and xrandr for adjusting gamma values but both of them not working in 21.04, they are executing successfully but rgb value remains the same, it used ...
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Bad screen quality on new asus notebook

I bought a new Asus Vivobook. I installed Ubuntu 20.04 and when I connected my monitor via HDMI I saw that the screen quality is not so good. The brightness seams to high and the gamma (looks very red-...
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Display brightness goes way up on suspend

Title says it all. When I lock, it stays the same, but if I suspend I'd say its going +100% brightness or idk what to call it. If I set the brightness to 0 I get a grey screen, if I set it to 1 I get ...
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Screen not recognizzed on laptop, xrandr goes "Failed to get size of gamma for output default"

Okay, that was a bold move. Took this old Acer 3633WLMi and gave it a SSD and a shiny 18.04.3 in Lubuntu flavor. According to most Ubuntu Wikis, this specific laptop should run smoothly, no issue ...
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Ubuntu 19.04 has extra hidden gamma curve? (weird stuff...)

As soon as i loaded my test image i noticed the gradient was no longer smooth but it contained some vertical artifacts. I should point out that the gamma is set to default in Ubuntu: xgamma gamma 1.0 ...
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Does anyone knows how to fix Intel+Nvidia gamma problem?

This is problem on HP laptop which has 2 video controllers. By using prime-select you can choose Intel or Nvidia. If you choose "prime-select intel", then xgamma working, but you are using low speed ...
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How do I change gamma on wayland

On X, I could change gamma by tuning the xorg.conf file and add a "Gamma" line with the right value to the "Monitor Section". How do I do this on wayland? [edit]Or: What's the name of the tool for ...
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Dark brightness / gamma with Nvidia drivers

I have this problem... When Im on Ubuntu 16.04 (LTS) or basicly every Linux distro that i tried before, i have a bug. On open-source drivers, my brightness and gamma are normal, but when i use any ...
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How to use "xrandr --gamma" for Gnome "Night Light"-like usage?

Background: More red / Less blue at night To save the eyes at night, adding more red and/or subtracting blue, is becoming popular in Windows 10 (blue-light filter) and Linux; Gnome Desktop (Night ...
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xrandr : Failed to get size of gamma for output default" for mDP type connection

My system specs : Intel i7-8700k (Coffe-lake) Mother board : ROG(Maximus X Hero) OS :Ubuntu-Gnome 16.04 I booted my new PC with Ubutnu-Gnome 16.04, after installation the screen resolution is ...
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Problem with custom resolution ubuntu 17.04

I installed Ubuntu 17.04. I have a problem with the screen resolution, I want to set a resolution of 1366x768 but the max resolution that Ubuntu allows me is 1024x768. I tried to increase the max ...
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How to control the RGB components for gamma+brightness+contrast from command line?

I saw this on nVidia application. We can control, for each component of RGB, these 3 values: gamma, brightness and contrast (below showing only for Red component): So, I want to know if we can access ...
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