Questions related to screen brightness.

learn more… | top users | synonyms

87
votes
18answers
77k views

Brightness is reset to Maximum on every Restart

The brightness of my laptop is reset to Max on every restart. I tried the solution provided at this website but had no luck. ...
57
votes
8answers
85k views

How to change LCD brightness from command line (or via script)?

To work around bug #1005495 (changing LCD brightness via hotkeys impossible), I'd like to have one command line query for increasing and one for reducing the brightness of my LCD. I could then map a ...
50
votes
11answers
41k views

Desktop doesn't remember brightness settings after a reboot

Every time I reboot my machine the brightness goes back to 100% in Gnome. I wish it would keep the last setting. Is there anyway?
30
votes
10answers
52k views

Unable to change brightness in a Lenovo laptop

Brightness adjustment keys <Fn + ⇑/⇓> have no effect (although they are recognized by the environment), and I can't change the brightness using GUI tools as well. This seems like a problem in ...
27
votes
6answers
35k views

How do I set default display brightness?

Is it possible to set the default display brightness so you don't have to re-adjust it everytime you reboot? My laptop display is killing my eyes at the login screen already because it starts at 100% ...
23
votes
4answers
5k views

Use webcam to sense lighting condition and adjust screen brightness

Is there a way to have my webcam sense lighting conditions and adjust screen brightness accordingly?
22
votes
4answers
13k views

Is there a software utility to adjust screen gamma/brightness/contrast?

I use to work at night and it is eye-hurting to watch at lightbulb-bright screens (I've got two - laptop's built-in panel and an external 18-inch CRT) in a dark environment. So I adjust my screens to ...
21
votes
8answers
22k views

How can I change brightness through terminal

Now I can change it by Fn+ arrow right but now I need to do it via my shell script
19
votes
3answers
2k views

Stop an insolent narwhal from “correcting” monitor brightness?

I want total absolute control over the brightness of my laptop's screen. I want Natty to fear my wrath should it dare to presume my desire. Natty's light adjusting minions should quake in terror ...
18
votes
4answers
9k views

Is there an alternative to Redshift and F.lux which only dims the screen?

I want one where it reduces the screen's brightness, either by time or on demand (I don't mind). I have onboard Intel graphics. I don't want it to be like Redshift where it changes the screen's hue.
17
votes
8answers
29k views

Brightness not working after installing NVIDIA driver

I recently installed Ubuntu 11.10 on my Mac Book Pro 7,1. I installed the NVIDIA driver (285). The brightness keys are working (F1 and F2) and I get the box showing the brightness but it does nothing. ...
16
votes
12answers
65k views

How to control Brightness

I didn't install anything myself, but only Ubuntu 12.04 LTS on an Acer 4741g. I use Fn+left/right to change the brightness, but failed. How can I control the brightness levels?
15
votes
4answers
18k views

How do you change brightness, color and sharpness from command line?

I am controlling my PC with SSH and scripting. How can i change the brightness, color and sharpness from command line? Try 1: failed $ sudo redshift -t 5000:5000 -g .5 Cannot list GNOME panel ...
13
votes
5answers
18k views

How to make Unity remember brightness settings?

This question has been asked many times for Ubuntu 11.10 but it always has been closed and linked with this link, but that accepted answer is from 2010 and that setting doesn't work anymore for Ubuntu ...
13
votes
3answers
2k views

Macbook Pro 5.5 brightness settings work, are remembered, but are not used on startup

This question's similar to various others in the forum where users' brightness settings either don't work or are not remembered: Brightness controls doesn't work on a MacBook Pro 5.5 (ubuntu ...
12
votes
5answers
16k views

What commands will change my screen's brightness?

I'm trying to re-keybind some of my function keys as I never use them for multimedia purposes, however I'm not sure as to what command I'd need to put it to increase/reduce the brightness, I'm talking ...
12
votes
5answers
8k views

Decrease Backlight Below Minimum

I have this laptop that doesn't handle the backlight very well. In /etc/default/grub, I have added a acpi_backlight=vendor function to get it to work at all. Which is cool, and the backlight now ...
11
votes
4answers
6k views

Brightness control on Awesome windowing manager

I have just installed Awesome WM and I have no options to change the screen brightness, and also its shortcut doesn't working. Any one can help?
11
votes
4answers
13k views

Screen brightness isn't taking effect on a Lenovo Z570

My Lenovo Z570 has two GPU's, nVidia and Intell. Brightness control has no effect what so ever over the screen brightness, and because I've had some major issues in the past when I was trying to ...
11
votes
4answers
19k views

I cannot change the screen brightness

here's my problem: Ever since I installed Ubuntu 12.10 on my computer I haven't been able to change the screen brightness, it was always set to the maximum. I did take a look at this post: Decrease ...
11
votes
1answer
1k views

How to disable KDE's brightness OSD?

I am using lightum to automatically control the screen's brightness depending on the surrounding light (on a Retina MacBook Pro). The problem is, though, that KDE picks up the change and displays the ...
10
votes
10answers
20k views

display brightness problem with ubuntu 13.04

I have a Dell Inspiron 5520 with intel core i7 and AMD Graphics card. It used to work fine with Ubuntu 12.04 and Ubuntu 12.10. Now I tried to install Ubuntu 13.04 but i can't change display ...
10
votes
2answers
3k views

Does redshift need an active internet connection to work?

It seems redshift doesn't run without an active internet connection. If so, is there some way it could be run when there's no connection to the Internet?
10
votes
3answers
16k views

Screen brightness reset to minimum after every reboot

Ubuntu 11.10 doesn't save my brightness settings between sessions. Everytime I boot up, the brightness is always at zero, and I always have to set it back to my preferred setting (at maximum). How can ...
9
votes
2answers
859 views

Stop Screen Dimming After 60 Seconds (MacBook running 12.04)

I'm running Ubuntu 12.04 on a MacBook air - everything works fine, apart from the fact that the screen dims after 60 seconds of activity. Is there any way to stop this? My computer is on mains ...
8
votes
2answers
837 views

Terminal command for checking/unchecking “Dim screen to save power”?

I am having problems preventing my laptop, running Ubuntu 14.04, from dimming its screen when on battery power. I have tried everything that is out there on the internet to prevent this happening, but ...
8
votes
11answers
5k views

How to increase brightness in smaller steps?

Is there a way to adjust lighting step ? I have Lenovo L520, and Fn + Light Up or Down adjusts by 20%, how can I adjust the step to 10% ? it will help me fine tune lighting at my dark room.
8
votes
2answers
2k views

Brightness setting is reset to maximum at login

My laptop's screen brightness is auto set to maximum at login (= at the login screen already). Even after I have adjusted it to lower it is again set to maximum after annother login. Is there a way ...
8
votes
3answers
4k views

Ubuntu 14.04 Brightness issue with nvidia Quadro

I recently upgraded from Ubuntu 13.10 to 14.04. Everything is fine, except the brightness of my laptop screen. When I change the brightness the screen simply does not respond. I figured this was a ...
8
votes
6answers
3k views

Brightness setting not remembered on an Asus X54H

So I set the screen brightness using either the function keys or the brightness & lock app. After a reboot or plugging in A/C the brightness goes back to max. When I take A/C off brightness is ...
8
votes
1answer
793 views

Display problem when adjusting brightness in ubuntu 12.04

Recently I installed Ubuntu 12.04 on my Dell 1554 laptop. I was adjusting my screen brightness when this happened : this has become a recurring problem which is really annoying. I also want to ...
7
votes
4answers
7k views

Screen Brightness Stuck on high on an HP dv7t laptop

I have an otherwise fully-functioning install of Ubuntu 12.04 on my HPdv7t laptop. When I press the 'brightness buttons' on the keyboard the associated images appear on my screen to say I am ...
7
votes
6answers
24k views

Screen brightness not working

I use Ubuntu 12.04 on my Sony Vaio(VPCCW2HGX). At the first times, brightness control works well, but after the activating additional drivers(nvidia accelerated graphics driver) brightness control ...
7
votes
11answers
21k views

Screen Brightness not adjustable for Acer Aspire S3

First of all, thank you very much for providing this useful forum. Too bad for me, there is no support for the Acer Aspire S3 yet (just came out in October) Short Description of the Problem: I cannot ...
7
votes
7answers
14k views

Brightness function keys not working

I have an ASUS X55A-SPD0204O laptop. The rest of the FN+Fx (where x = number) like sound + - mute, screen turn off, wireless etc. work perfectly. The problem is with the 2 brightness keys. They just ...
7
votes
1answer
9k views

How to stop gnome-power-manager from changing the global backlight setting?

After installing Ubuntu on my ThinkPad T510, the GDM screen and GNOME session would always start at 100% brightness. I quickly found out, that this can be controlled via gnome-power-preferences, but ...
7
votes
3answers
4k views

Can I control brightness on second monitor?

I have a thinkpad (x301) with an external monitor connected via a DisplayPort to HDMI cable. I can control the brightness of the laptop monitor using the keys on the laptop, but I can't work out how ...
7
votes
6answers
2k views

Changing brightness at startup

My Lenovo T440s starts up with maximum brightness. Following this thread I have tried to alter rc.local, but this does not work. When I execute the command cat ...
7
votes
1answer
2k views

Control external monitor brightness via software

Hello Ubuntu community, I can control the brightness of my DELL U2713HM connected with DisplayPort via the command: ddccontrol -p -r 0x10 -w 53 where in this example the number 53 represents the ...
7
votes
1answer
5k views

Why there are two brightness control file (/sys/class/) in my system

I own an dell xps 15. I guess the following is because I have hybrid graphics system (nvidia optimus). When I run command to find out lcd brightness path using following command, ls ...
7
votes
1answer
8k views

How to change the shortcut to adjust brightness?

I want to make my own shortcut to increase or decrease brightness. I don't like the default shortcut of my HP laptop (Fn + F7 to decrease and Fn + F8 to increase). Is it possible?
7
votes
5answers
4k views

Macbook Pro boots with full screen brightness and keyboard backlight

I have dual-booted my Macbook Pro with Ubuntu 12.04 . Whenever i log-in to Ubuntu, it does so with full screen brightness and keyboard backlight at full . How do i get rid of this? How can i tweak the ...
7
votes
5answers
12k views

Brightness Controls Not Working on a Dell Inspiron N4010 Laptop

I have a Dell Inspiron N4010 laptop. My brightness hotkeys are not able increase or decrease the brightness of the screen. And as a matter of fact, I also can not reduce the brightness from the ...
7
votes
1answer
212 views

“monitor brightness down” key resets brightness before lowering it

My monitor brightness down key resets my brightness before lowering it, effectively leaving me at near max brightness. I do not experience any problems with the brightness up key. I'm using a Dell ...
6
votes
6answers
7k views

Can't adjust screen brightness on Macbook Pro 10,1 Ubuntu 13.10

I recently installed Ubuntu on my retina Macbook Pro (following this great guide). Everything works fine so far however the screen brightness / backlight cannot be adjusted neither by using the ...
6
votes
2answers
3k views

Change the brightness adjustment interval

So whenever I hit my dim/brighten keys on the keyboard, a notification bubble pops up with the screen brightness. All that's fine, but I would like to be able to change how much the brightness changes ...
6
votes
5answers
11k views

How do I get the brightness control working on a Lenovo Yoga 13?

Brightness control doesn't work by default in Ubuntu 13.04. Solution for 12.10 doesn't work, also as this Any idea how to fix it? Update: After research I found how to change brightness manually. ...
6
votes
4answers
11k views

Can't adjust brightness on my laptop

I'm having difficulty in adjusting brightness on my Acer Aspire 4740: Screen 14.1-inch glossy LED-backlit, 1366x768 res CPU Intel Core i5-430M 2.26-GHz RAM 1GB DDR3 HDD 320GB Graphics ...
6
votes
7answers
10k views

Brightness issue in a Lenovo ThinkPad Edge LR236W5

After upgrade from 13.04 to 13.10 Brightness is not working. Please let me know how to fix this issue, Machine configurations given below. id: thinkpad description: Notebook product: 0301G8G () ...
6
votes
2answers
362 views

Diagnose brightness control [closed]

Brightness control on my laptop does not work, how can I diagnose if it's unsupported, or a bug? And if it is a bug, what do I include in the bug report? UPDATE Thank you for all the responses, ...