Questions related to screen brightness.

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34
votes
15answers
93k 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 ...
15
votes
7answers
30k 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 ...
11
votes
5answers
51k views

Tool to adjust monitor's backlight brightness in Windows [closed]

Do you know of any tool for Windows that let me adjust the backlight brightness of a monitor?
9
votes
2answers
354 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 ...
8
votes
2answers
3k 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 ...
8
votes
1answer
8k views

Windows 7 brightness slider suddenly gone

Brightness slider in power plan settings recently disappeared. How to fix it?
7
votes
1answer
25k 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, ...
6
votes
6answers
18k 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 ...
6
votes
2answers
27k 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
2answers
925 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 ...
5
votes
4answers
160 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
31k 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 ...
5
votes
3answers
2k 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 ...
5
votes
4answers
8k 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 ...
5
votes
4answers
4k 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
816 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
2answers
815 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
3k 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
4k 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
338 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
3answers
16k 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 ...
4
votes
2answers
2k 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 own. /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
2answers
3k 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 ...
4
votes
5answers
11k 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 ...
3
votes
2answers
788 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
1answer
772 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 ...
3
votes
1answer
4k 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
9k 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
3answers
2k 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
2answers
2k views

HP Envy screen brightness .. stuck

once in a while, the screen brightness stops responding to any reason, and stays on full brightness.. for those of you that have HP Envy, you know what this means... battery suicide. the FN+* ...
2
votes
5answers
4k views

Can I turn down the screen brightness on my MacBook Pro any further?

I sometimes use my MacBook Pro with all the lights off in the room. I turn the screen brightness down to its lowest setting (and turn off the automatic brightness adjustment), but it’s still a bit too ...
2
votes
3answers
7k 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 ...
2
votes
3answers
8k 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 ...
2
votes
2answers
12k views

Sony VAIO dim screen on Windows 8

I installed Windows 8 on my Sony VPCS111FM laptop. It has an ambient sensor that auto-dims the screen; this sensor is reliant on the video driver working. The default video driver that came with ...
2
votes
2answers
595 views

Brightness Indicator

What software can I use for Windows 7 to show an on-screen progress-bar notification of the brightness when I change the brightness of my screen?
2
votes
2answers
4k views

Software to auto adjust brightness of screen(s) from webcam

Does any windows software exist to auto-adjust the brightness of a monitor (laptop screen and external monitor) based on the amount of light that a connected webcam senses?
2
votes
1answer
267 views

Customize adaptative brightness in Windows 8

I'd like to customize the adaptative brightness function (max luminosity = fn(sensor-light)) on my laptop. In a very dark environment, my maximum screen brightness is too low, I have to disable auto ...
2
votes
1answer
173 views

Running Redshift commands from crontab, doesn't work

About redshift: Redshift adjusts the color temperature of your screen according to your surroundings. This may help your eyes hurt less if you are working in front of the screen at night. A typical ...
2
votes
1answer
217 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 ...
2
votes
1answer
900 views

Ideal brightness and contrast value in LCD monitor?

I'm using 19 inch LCD monitor. The distance between me and monitor is around 80 cm. For this distance, what is the value of brightness and contrast for normal eye sight?
2
votes
1answer
54 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, ...
2
votes
1answer
2k 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 ...
2
votes
3answers
2k views

Lenovo G560 screen brightness control doesn't work

I recently installed Windows 8 Enterprise EVAL on my Lenovo G560 and the screen brightness control stopped working. I tried installing both the video driver from Lenovo's website and the one from ...
2
votes
1answer
1k views

How to get backlight on my Acer Extansa 5220 laptop to lower than minimum brightness level?

Minimum backlight level is not as dim as I want. I want to be able to tune it to arbitrarily low level, for example to be hardly visible in a dark room (but still visible). In my digital camera I've ...
2
votes
2answers
2k views

Screen gets stuck in a dim setting after waking up

I've got a laptop that I recently upgraded from Vista to Windows 7. It works a lot better now for a lot of things, but there's one problem I've had happen a few times that never happened under Vista. ...
2
votes
1answer
1k views

Laptop screen brightness stuck

I can no longer adjust the brightness of my laptop screen, it's stuck at the lowest. In Linux, the brightness adjustment keys (Fn + F4/F5) still work, since a brightness popup shows and the meter bar ...
2
votes
1answer
27 views

Screen Brightness no Longer Adjusts Immediately

I am not sure when this became an issue, but today I noticed that when I adjust the screen brightness on my laptop, it only takes effect after I either restart my computer or lower my laptop lid and ...
2
votes
0answers
46 views

Minimum brightness level is too low and totally turns off backlight

On my Dell Latitude E6400, the minimum brightness level seems to be set to an incorrect and way too low level; the lowest brightness setting (both via the Fn+Up/Down keys and the control ...
2
votes
0answers
54 views

Ambient Light Sensor

I using the HP nc6400 notebook. The display shows dim whenever the light sensor is on, but when I disable the light sensor option, the brightness is satisfactory but it is blinking. How do I cure that ...