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Questions tagged [brightness]

Questions related to screen brightness.

73
votes
20answers
325k views

How can I dim my computer screen beyond the minimum?

I usually just use Fn + Left or Fn + Right to adjust my screen's brightness but the minimum settings are still too bright for me (especially when I'm working at night). I tried going through the Power ...
43
votes
9answers
64k views

Brightness changes while “Adaptive Brightness” is disabled in Windows 8.1/10 with Intel HD Graphics

The brightness changes with the colors displayed on the screen on my Lenovo Thinkpads with Intel HD Graphics. Light colors make the screen brighter, dark make it darker. Same behavior in Windows 8.1 ...
38
votes
8answers
60k views

Laptop monitor brightness changes depending on image displayed

I have a windows 8 laptop. My desktop background is very dark (almost black) and when i have no windows open, my brightness dims. When i open an application that is primarily white (google chrome's ...
34
votes
6answers
115k views

How to adjust monitor's backlight brightness in Windows

My monitor is more than an arm's length away from me, so adjusting its backlight brightness is quite inconvenient.Is there a way in Windows to adjust the backlight using the keyboard and/or mouse ...
22
votes
2answers
54k views

How to disable automatic brightness setting on LG monitors?

I have two LG monitors (both 23MB35PM) which have an annoying and distracting feature of automatically changing their brightness at random times, probably due to some power saving mechanism.How can ...
20
votes
9answers
36k views

How to change brightness on CRT display through the Linux command line?

I have a Debian Linux desktop and a CRT display. I want to change the screen's brightness without using the monitor's brightness controls. How can I do this? Is this possible in the command line or is ...
20
votes
7answers
33k views

How to disable auto brightening LCD

I am not talking about adjusting screen brightness through power management (this is a laptop), I'm not talking about how the screen brightness setting may be different between 'plugged in' and '...
20
votes
7answers
59k views

How to prevent laptop screen brightness from changing when un/plugging battery power

When I am using my laptop, I continually adjust the screen's brightness based on the lighting conditions in the room (e.g. how much light is coming in from windows, etc.). But if I unplug the laptop ...
14
votes
3answers
6k views

Is there a work around to configure brightness or color on a DisplayLink monitor?

I run 3 monitors in addition to my laptop display at work - two of the monitors are using DisplayLink adapters. I've always thought that all my displays were too bright (and possibly give me ...
13
votes
6answers
239k views

How to properly adjust monitor brightness and contrast? [closed]

This days, it seems that I either go worse with my eyes or some settings with contrast and brightness have been changed.However, I have been searching now for some tutorial on how to adjust contrast ...
12
votes
4answers
10k views

Can't write to file /sys/class/backlight/acpi_video0/brightness (ubuntu)

I am trying to change the brightness by overwriting the value on this file:sudo echo 5 > /sys/class/backlight/acpi_video0/brightness-bash: /sys/class/backlight/acpi_video0/brightness: Permission ...
11
votes
1answer
64k views

Brightness settings gone, how do I bring it back?

I have a VAIO CW laptop with Windows 7 x64, and after installing new NVIDIA drivers, my screen brightness controls are no longer available. (Not in the control center, not in the power options, ...
10
votes
1answer
13k views

Windows 7 brightness slider suddenly gone

Brightness slider in power plan settings recently disappeared. How to fix it?
10
votes
4answers
9k views

Is it possible to enable software brightness control on Dell U2412M

Well, I just wanted this yes/no simple question to Dell e-mail support. Their web site required service code just to send an e-mail. Then I tried their "technical" chat support. Some Indian person ...
10
votes
2answers
921 views

Is there a way to display a real-time image histogram of all or part of what my monitor is displaying?

I am trying to adjust brightness/contrast in photo/video editing software that does not provide image histograms. What I would like is a piece of windows software that displays a real-time histogram ...
9
votes
3answers
10k views

Do blue light filters actually reduce blue light?

I'm using redshift to reduce the blue light of my computer screen, which is supposed to be more relaxing for the eyes.So I wander, if the screen is visibly more reddish, does that mean that there is ...
8
votes
2answers
10k views

Dim screen past the minimum on Ubuntu

My laptop's screen is far too bright at night, even if I set it to minimum brightness. I know that it is capable of being dimmer, because Windows will dim it further if I leave it idle. However, I can'...
7
votes
6answers
47k views

How do I change the brightness and contrast of YouTube videos on-the-fly?

I'm tired of different video black levels which take down the quality of the video.Some examples, depending on your brightness level you might or might not see the difference:If you can't see the ...
7
votes
4answers
45k views

Why does my screen dim on a desktop installation of Windows 7?

Periodically, while using my Windows 7 Pro desktop installation, the screen suddenly dims. The brightness is about 75% normal (estimate). It's as if I am in a power-saving mode on a laptop running on ...
7
votes
4answers
28k views

Adjust screen brightness directly from taskbar in Windows 8?

Is there any way I could adjust screen brightness directly from the tray by clicking the battery icon and moving a slider in the window that pops up (below)?Having to click "Adjust screen brightness"...
7
votes
3answers
44k views

How to disable the light sensor on a Vaio laptop

I just got a new Vaio laptop. It is great.However, the ambient light sensor dims the screen brightness and prevents me from changing it.Is there a way to disable the ambient light sensor and go ...
6
votes
3answers
26k views

Adjusting laptop display brightness doesn't work in Linux Mint 14

I recently installed Linux Mint 14 on my Samsung R580 laptop. The Fn-keys worked out of the box, I can switch screens, adjust volume and so on.When I try to adjust the brightness (Fn + ↑/↓), the ...
6
votes
5answers
9k views

How to change to brightness of an external display on a macbook pro running OSX 10.6

I am using a macbook pro running OSX 10.6 snow leopard.In System Preferences/Displays/Display, I can change the brightness of the macbook's screen. However, this option is not available for the ...
6
votes
9answers
71k views

Laptop Brightness dims when charger is unplugged(no solution)?

Hello yesterday i bought DELL Inspiron 15 (3542) win 8.1. And noticed that if charger is plugged on, screen becomes brighter, and after unplugging dimmer. Of course i tried adjust screen brightness, I'...
6
votes
4answers
36k views

I can't control my Dell's brightness

I bought new Dell Inspiron 3521 with Linux installed. I've installed Windows 7. Everything would be alright but I can't brighten my screen. It looks like it is at the lowest brightness level. The ...
6
votes
3answers
5k views

How to switch off auto brightness on a Lenovo W530

The auto brightness "feature" of Windows 8.x is driving me crazy. I would like to switch it off on my Lenovo W530.Adaptive Brightness is disabled in Power Optionsthe Sensor Monitoring Service is ...
5
votes
4answers
173 views

Are TFTs intended for brightly lit enviroments only? [closed]

I recently bought a 22" (LG) TFT to replace my old 17" CRT monitor. The very first thing I noticed was how bright it was. I reduced the brightness from 100 to just 20 and toned down the gammma and ...
5
votes
4answers
7k views

Can I fine-tune my screen brightness?

My laptop is Lenovo T400, and my OS is Ubuntu 10.10. I change the brightness of my screen by pressing the FN key and one of the two keys for increasing/decreasing brightness.The brightness I feel ...
5
votes
2answers
4k views

Laptop dimming display on dark backgrounds

My Acer laptop running Windows 10 has a very annoying feature: when running on battery, the LCD backlight dims gradually when displaying a dark screen and brightens gradually when displaying light ...
5
votes
1answer
42k views

How to increase brightness of laptop screen above maximum in BIOS or Linux/Windows?

Is it possible to increase the brightness of laptop screen above what's possible in BIOS and Ubuntu Linux/Windows ?I have an old laptop (Lenovo-X200s) and the maximum brightness is rather dark. I ...
5
votes
2answers
2k views

Can I fine-tune my screen brightness keys? (Ubuntu Studio, Thinkpad T420s)

I am in a similar situation as question Can I fine-tune my screen brightness? . For me, Thinkpad T420s and Ubuntu Studio 11.10. The brightness keys work fine but the increments are too large. I have ...
5
votes
1answer
2k views

How can I find a light sensor to adapt my monitor's brightness to the room?

Where can I find a standalone light sensor that updates the brightness of my screen to match the ambient light level in realtime for Windows 7? My monitor does not have a sensor. I had the idea ...
5
votes
2answers
1k views

Backlight control in Eee PC 1015PEM

When I boot my Linux with acpi_osi=Linux, I can control backlight brightness from almost_zero to moderately_bright. (Actually, the maximum revolves around the brightness level that is set before Linux ...
5
votes
2answers
5k views

Windows 8 on ASUS notebook, brightness down does not work

Recently my brother installed Windows 8 on his ASUS notebook. He had problems with the FN keys, so he asked me to have a look at it.I've installed the ATK Package from ASUS found in this other ...
5
votes
1answer
5k views

Windows 8 Fn key doesn't work for brightness

I have an Asus laptop with Windows 8 and clicking Fn+F5 / Fn+F6 keys (for brightness) doesn't work. In fact, they work, but they can increase/decrease the brightness only one time. What I mean is that ...
5
votes
1answer
345 views

acpi not running action

I have a scripts to control display brightness:/etc/acpi/actions/bl_down.sh:#!/bin/shbl_device=/sys/class/backlight/intel_backlight/brightnessecho $(($(/usr/bin/cat $bl_device)-10)) | sudo /usr/...
5
votes
1answer
1k views

Is there a way to adjust colors of a specific window?

Is there a (Windows) program or something that will allow the user to adjust the brightness/contrast/gamma of a specific window rather than the whole screen?As a use-case scenario, imagine having a ...
4
votes
2answers
3k views

How to set the laptop screen brightness programatically?

I'm currently migrating to openbox without gnome session. In unity i can use the vendor keys to set the screen brightness, but in openbox I'm on my ownhttp://superuser.com/sys/class/backlight/acpi_video0/brightness ...
4
votes
2answers
1k views

Laptop Screen Brightness

What controls the brightness levels in a laptop? Is it the BIOS? Is it possible to modify the brightness levels to have a custom brightness at each level?
4
votes
4answers
9k views

After upgrade to Windows 8, max brightness is not really max

I recently upgraded my Dell M17xR3 to Windows 8. After install, I noticed that my screen brightness had been reduced to almost half of the original brightness, although brightness control seems to be ...
3
votes
5answers
39k views

What could cause my computer's display to go darker suddenly?

My monitors lost their brightness without warning or reason. I left my computer alone for a couple hours, and when I came back my monitors were so dark I could barely see anything. It looks as if ...
3
votes
2answers
5k views

Dim screen below minimum brightness level

I have both set my screen brightness to 0% in Windows 10 and activated f.lux at the lowest possible value (2700K), but I still think it's too bright.Is it possible to further dim the screen or ...
3
votes
3answers
14k views

Can't change monitor brightness

I've a Samsung SyncMaster B1930 Monitor. I've installed all the graphics drivers.I'm unable to set or change the monitor brightness because it says that MagicEco is ON. I've also downloaded some of ...
3
votes
3answers
1k views

Should LCD Brightness Match Environmental Lighting?

I have a new T410 laptop and ever since I've been using it, I've discovered that my eyes don't stress as much when I adjust the brightness to my environmental lighting. For example, during the day, I ...
3
votes
2answers
349 views

Brightness at minimum all the time

I have a Sony Vaio with Windows 8 and the brightness is at the minimum level all the time. If I increase it with Fn+F6 it immediately reverts back to minimum. I am not sure what to do next. I have ...
3
votes
1answer
17k views

Brightness on one of dual screen monitors keeps lowering

I have a dual screen setup on an HP Pro 3300 (Pentium G620 2.6GHZ, 3GB RAM, 500GB HDD) running Windows 7 Professional x64 and using a ATI Radeon HD 5450 (both monitors are connected to the GFX Card, ...
3
votes
1answer
2k views

How do I decrease the brightness of my screen below the minimum on Windows 8?

The minimum brightness on my desktop monitor is far too bright. I need a way to reduce the brightness of my screen below the minimum. On my Mac, the app Brightness Slider worked perfectly for this ...
3
votes
1answer
6k views

Adjust output Brightness/Gamma/Colors in Gnome

We have a desktop system running Ubuntu 8.04.4, and it is connected to a standard desktop LCD monitor. Unfortunately, in 8.04.4, the brightness of the image is cranked way up. It appears to be a ...
3
votes
3answers
17k views

How do I get my laptop's screen brightness settings back?

From when I bought it up until yesterday, my laptop would dim the screen automatically if you let it sit for long enough, and then if you hit a key or moved the mouse, the brightness would jump back ...
3
votes
1answer
600 views

Brightness adjustment interval in windows

I have a windows laptop in which we can use the Fn+Arrow Key to change the brightness of the screen. The default interval of brightness interval is 10%.Is there any way I can reduce this interval so ...

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