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.
15
questions
1
vote
0
answers
364
views
How to manually adjust display gamma on 22.04 in wayland
I work on old HP laptop with additional monitor. After panel replacement everything was looking fine, until i connect additional monitor via DP. It's noticeable that build-in display switch rgamma to ...
0
votes
2
answers
1k
views
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 ...
1
vote
0
answers
225
views
How to invoke a command when starting a user session?
OS: Ubuntu 22.10
graphic card: nvidia
monitor: philips
Issue: how to change default gamma after X11 startup.
The gamma command I wish to invoke is either:
xgamma -rgamma 0.6 -ggamma 0.5 -bgamma 0.5
...
7
votes
1
answer
3k
views
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 ...
4
votes
3
answers
2k
views
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&...
31
votes
3
answers
24k
views
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 ...
0
votes
0
answers
537
views
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 ...
0
votes
1
answer
743
views
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 ...
1
vote
1
answer
544
views
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-...
3
votes
1
answer
18k
views
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 ...
0
votes
1
answer
136
views
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
...
0
votes
1
answer
1k
views
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 ...
2
votes
1
answer
1k
views
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 ...
0
votes
0
answers
392
views
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 ...
2
votes
0
answers
2k
views
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 ...