Questions related to screen brightness.

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81
votes
9answers
138k 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 ...
5
votes
6answers
14k views

Brightness controls not working on a Sony Vaio VPCEH38FN

I have ubuntu 12.04 installed on windows 7. When I use the Fn alongside the key to reduce brightness, or even using the system settings, I am not being able to reduce the screen brightness. What is ...
2
votes
1answer
5k views

Fn keys for Brightness not working on Toshiba Satellite L755

I am running Ubuntu 12.04 and I love it! The only problem is the keys for my brightness, F6 and F7, does not work when I am on battery power or AC power. It randomly works after I am idle for a while ...
0
votes
1answer
825 views

12.04 monitor brightness commands ignored

I cannot change the brightness of the monitor on a laptop either from the command line or from keyboard shortcuts. I have verified that the file in /sys/class/backlight/acpi_video0/brightness is ...
0
votes
1answer
1k views

Brightness settings won't change on an HP dv7t-6100 CTO

I recently installed Linux, and it seems my brightness settings will not change. I have keys on my laptop for it, and they lower and raise the brightness bar but the screen does not change brightness. ...
3
votes
3answers
2k views

Brightness setting not remembered after boot — rc.local “fix” not working

Using Lenovo X220 laptop. I installed 12.04 on it. Every time I boot the display's brightness sets to the highest setting: maximum_brightness 15. This is way too bright and want to set it to 4. I ...
9
votes
5answers
5k 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 ...
4
votes
2answers
5k views

Brightness keys F4 and F5 not working on Dell XPS 15.6 Laptop

Please provide me a solution how to fix this?
1
vote
1answer
1k views

Brightness keys don't work on a Toshiba Satellite L655

I have a laptop toshiba satallite L655 with ATI Radeon HD 5650. I have a problem in my super key for the brigthness. When ever i press FN+f6 or FN+f7 to increase or decrease the light, nothing ...
4
votes
4answers
5k views

Cannot adjust brightness on my Packard Bell EasyNote TS11HR-127GE laptop

I am using Ubuntu 12.04 LTS on my Packard Bell EasyNote TS11HR-127GE laptop and I cannot adjust the brightness. If I change the slider, the brightness is always at maximum. My laptop is using NVIDIA ...
0
votes
1answer
62 views

Backlight on a Dell M1330

On my Dell M1330, there's 7 or 8 levels of backlight, but hitting [Fn]+[Up] and [Fn]+[Down] changes brightness level about 3 notches. Any suggestions to make it change it only 1?
2
votes
1answer
1k views

The brightness gets reset after unlocking

I'm getting this annoying behaviour (didn't occur on any of the previous releases), every time the display gets lock after typing the password the brightness is reset to 100%. But when I open the "...
1
vote
3answers
2k views

Brightness Hotkeys Only Slightly Work

I just installed Precise on my Samsung Laptop (QX412-S01au, using Ubuntu 2D). The brightness hotkeys sort of work: Adjusting the brightness using the slider in the control panel works just fine ...
7
votes
4answers
36k views

How to make my screen brightness not change when I plug my laptop in

I do not want my laptop to change brightness when my laptop power is plugged in or unplugged. I set my brightness based on how bright my surroundings are. If I am in a dark room, I set my brightness ...
1
vote
4answers
3k views

The Fn key wont work on Toshiba satellite L735?

The Fn key wont work on Toshiba satellite L735 on ubuntu 12.04 so anyone can help me please ???
6
votes
1answer
789 views

Can you help me write a script to set a new default brightness for the screen/keyboard after login?

On my Macbook Pro Ubuntu alsways boots with... keyboard brightness at maximum illumination screen brightness at maximum illumination ...both which I need almost never during normal usage. ...
1
vote
2answers
6k views

No back light on my Acer Aspire 5734z

I installed Ubuntu (12.04) on my Acer Aspire 5734z and the back light stopped working. I have tried the fix by editing the grub file posted on here a couple of days ago but that hasn't fixed it. I ...
4
votes
1answer
5k views

Is a brightness control widget available?

Is it possible to place a slider or some other GUI component on the desktop / Notification Panel on Ubuntu 12.04 to control the screen brightness? It's a little annoying to constantly have to go to ...
1
vote
2answers
785 views

Contrast Getting Reset to its Maxmum Value After Restarting System

Recently i installed Ubuntu 12.04 on my Laptop "Dell Inspiron-N4010". i am facing problem with my contrast control,after restarting my system contrast is getting reset to its max value. so each time ...
7
votes
1answer
6k 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 /sys/class/...
0
votes
3answers
11k views

How can i make Brightness Control work?

I have Xubuntu 12.04 with latest updates on Toshiba Satellite A210-15K laptop semen@bloknot:~$ uname -a Linux bloknot 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 ...
3
votes
1answer
4k views

How do I prevent Ubuntu from changing my laptop screen brightness level?

I have installed Ubuntu 12.04 LTS on my dell inspiron 1464. Everything is working fine. Except my LED brightness. Every time I adjust it to my suitable level. But after reboot it goes on high as it ...
1
vote
2answers
3k views

Brightness control Issue Samsung RV520 in Ubuntu 12.04

I am unable to change and reduce the Screen brightness of my laptop Samsung RV520, it has only one graphics card Nvidia's GT520M, although brightness control appears by pressing FN+UP/DOWN ...
0
votes
1answer
713 views

Why would screen brightness not adjust ofter closing laptop lid?

Brightness adjustment works until I close my laptop. After I close it once I cannot adjust the brightness. I often restart the computer to be able to adjust again. The Fn Keys do not work. The ...
1
vote
1answer
748 views

Brightness Keys on Samsung X360

I recently installed 12.04 64 on my Samsung X360 and most of the hot keys work (Volume, disable mousepad, num/scroll locks, display, battery). However, when adjusting brightness, there is only two ...
0
votes
3answers
4k views

Brightness options in Ubuntu 12.04 desktop missing

I am unable to change the brightness of my desktop screen using this path. System settings{top right corner of the screen)>Under Personal Brightness & lock.No option to change brightness is ...
1
vote
1answer
2k views

Toshiba L745 Brightness Problem, Fn Keys doesn't works

Has someone solved the brightness problem in Toshiba Laptops? I have a Toshiba L745-s4210 laptop with an Intel HD 3000 graphic card, after install ubuntu all works out of the box except the keys to ...
19
votes
12answers
75k 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?
1
vote
2answers
4k views

Brightness controls not working on a Sony Vaio VPCY2

The brightness control are not working on Ubuntu 12.04 64-bit , Sony Vaio VPCY2 ( Intel video card) . I've tried both ways Fn+F5/F6 and from Brightness/Lock menu (under Settings) - I can slide the ...
1
vote
5answers
2k views

Asus K53S F5 F6 brightness keys not working

On my Asus K53S i7, the F5 and F6 keys, for brightness controls, don't work. In Ubuntu 11.10 and in 12.04 (by upgrading mode). I don't know if there is some relationship with the first problem, but ...
0
votes
1answer
1k views

G210M Screen brightness control issue

I have a Sony VAIO VPCCW15FG laptop with NVIDIA G210M graphics card. I can't adjust the screen brightness! If I use the Fn shortcuts the brightness notification shows-up and there the brightness ...
2
votes
3answers
3k views

Backlight Issue - Samsung RV509 Notebook

I installed Ubuntu 12.04 today on my Samsung RV509 Notebook (Nvidia Geforce 315M) and the backlight brightness controls don't work on it. I did some digging around the web and found the samsung tools ...
5
votes
1answer
15k views

Brightness controls doesn't work on a MacBook Pro 5.5 (ubuntu 12.04 LTS) [duplicate]

Possible Duplicate: Brightness controls doesn't work on a MacBook Pro 5.5 I recently installed Ubuntu 12.04 LTS on my MacBook pro 5.5 (mid 2009). I have a problem with the brightness ...
0
votes
2answers
2k views

Cannot change brightness on an Acer Aspire 5745-dg [closed]

I have an acer aspire 5745dg laptop and i have also a very serious problem!! My brightness is always at maximun and I cannot change it with the fn keys or from the power management and my battery ...
0
votes
1answer
648 views

Laptop Brightness indicator

I have developed a brightness indicator for unity in python. I change the brightness using the following system call: echo 4 > /sys/class/backlight/acpi_video0/brightness [value = 0 to 9] ...
0
votes
0answers
138 views

How to enable screen brightness control? [duplicate]

Possible Duplicate: Fn+f2/f3 do not change brightness on my hp dv7-6135dx I have an HP pavilion dv7, I can't control the screen brightness not using special keys and not using the option in ...
2
votes
2answers
7k views

How do i make screen dimming work in ubuntu 12.04 (beta 2)

I recently installed Ubuntu 12.04 (beta 2) on my HP mini 110-4117, but I cant control screen brightness. The Fn + F2 , Fn + F3 keys don't work. System Settings > Brightness and Lock doesn't provide ...
9
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 ...
5
votes
3answers
1k views

Brightness keys adjust brightness too many times

Every time I hit a brightness key on my laptop's keyboard, it adjusts the brightness by three steps instead of one. How can I fix it so that it only adjusts one step at a time? I am using an Acer ...
0
votes
0answers
45 views

how to adjust the Brightness control in Ubuntu 12.04? [duplicate]

Possible Duplicate: There's an issue with an Alpha/Beta Release of Ubuntu, what should I do? I have Vaio Sony laptop Nvidia , and when I use Fn F5,F6 I can see the volume in the screen ...
1
vote
2answers
3k views

Problem with brightness Sony Vaio NVIDIA graphics

Recently I have installed Ubuntu 11.10 on my laptop (Sony Vaio VPCF22MOE). My graphics card is NVIDIA GeForce GT 540M. After ubuntu installation I installed NVIDIA Driver Version which is 295.33. I ...
1
vote
1answer
1k views

Ubuntu Refuses to Change Backlight Brightness

I've attempted to change the Backlight Brightness, by both the keyboard setting and directly in the screen settings. Both show that I've changed the brightness down to minimum neither actually changed ...
2
votes
0answers
357 views

How to tell gnome which file to use to change backlight brightness? [closed]

I have a Dell Inspiron M5010 and I am unable to change my backlight brightness with the F-Keys and it also does not work with gnome brightness widget. I am able to change backlight brightness ...
1
vote
1answer
652 views

Minimum brightness level is brighter than the levels just above it

I'm using a macbook pro 8,1. When I use the brightness keys on the keyboard, decreasing the brightness works until it reaches the lowest brightness level. At that point (when on the lowest level), the ...
0
votes
4answers
6k views

How do I adjust the brightness on a Toshiba Satellite L750/L755?

Can you please help me ? I tried everything I found and nothing worked. For example, I modified grub configuration file, installed xbacklight and tried setpci command.
1
vote
1answer
2k views

HP 6735s Brightness hotkey problem; where is brightness panel?

I have installed ubuntu 11.10 on my laptop hp 6735s. The screen is often too dark and i want to make it brighter, although the hotkeys Fn+F7/F8 are not working. I have tried some things: Firstly it ...
-1
votes
3answers
4k views

fn keys for brightness not working on an hp 6735s

I use ubuntu 11.10 on hp 6735s, fn keys work for sound adjustment, but for brightness %98 of the times not working, I mean till now only maybe three or four times it worked. always I must set the ...
3
votes
0answers
1k views

Thinkpad brightness steps error using FN+Home/End [closed]

I've met the following problem: normally my T400 (Lenovo Thinkpad) has 16 steps of brightness, and Windows utilizes it correctly. After a fresh install & minor tweaks Mint 12 (which is based on ...
0
votes
1answer
239 views

Brightness of screen to dark, no regulation possible

I have installed on a Laptop Ubuntu 11.10 (Oneiric Ocelot), it's working fine, but the screen is mutch to dark and no regulation is possible. Grafic card: ATI Mobility Radeon X1350.
2
votes
2answers
5k views

Acer aspire one d270 can not set brightness

I hope you can help me figure out how to set the brightness at my netbook. Following problem appears since I installed ubuntu 11.10 on my acer: I am not able to adjust the brightness by FN Keys nor ...