Questions related to screen brightness.

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1
vote
1answer
701 views

Why KDE cannot change brightness, while Unity can? Macbook Air 4,2

I installed Ubuntu and KDE too on my MacBook Air 4,2, but I realised I cannot change brightness in KDE. In Unity, it works without problem. Other keyboard keys works properly, sound, play, etc., but I ...
2
votes
2answers
2k views

Can't adjust brightness on Samsung RV420 with fn keys

Typing ls /sys/class/backlight/*/brightness outputs /sys/class/backlight/intel_backlight/brightness /sys/class/backlight/samsung/brightness The max_brightness for the second is 8, but changing it ...
9
votes
6answers
27k 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 ...
0
votes
1answer
216 views

Not able to change brightness on a Compaq Presario CQ61

Here is my result of lsmod Module Size Used by joydev 17393 0 vesafb 13516 1 snd_hda_codec_hdmi 31775 1 snd_hda_codec_idt 60251 1 ...
2
votes
1answer
540 views

Making the screen darker than the lowest brightness setting

I'd like to make the screen in Ubuntu darker than the lowest brightness setting. Is there any way to do this besides inverting the screen brightness?
2
votes
1answer
282 views

Brightness adjustment impossible after hibernation (MacbookAir 3.2, Ubuntu 12.04)

After waking my computer up from hibernation (close lid, open lid) I loose the ability to adjust the brightness with the F-keys and in the settings. It's the only problem I have with ubuntu on my ...
1
vote
1answer
3k views

Brightness goes down for the whole screen, when windows with dark backgrounds are enlarged

The brightness of the whole screen goes down considerably when I enlarge windows with a dark background (Gnome-terminal and TTYs for example, as well as Games, especially when in fullscreen). It's up ...
3
votes
2answers
18k views

Stuck on Ubuntu boot screen

I recently download Ubuntu 12.04 LTS onto my Macbook Pro 5-5. Everything worked seamlessly, save for the brightness control. I couldn't change the screen brightness from the hardware buttons, nor from ...
0
votes
1answer
2k views

Ubuntu 12.04 - Unable to change brightness [ATI HD xxxx - Toshiba Satellite L510 19e]

i can't change my brighness. On my Ubuntu is the original Driver from ati.com running. i used Ubuntu 12.4 with the lastest Updates. Can everyone help me? Thanks Guys! my xorg.conf: Section ...
1
vote
6answers
6k views

Unable to change brightness on a Toshiba L750

So, as a number of users seem to be experiencing, I am unable to change brightness on my laptop. Using the Brightness and Lock in settings, the slider moves but brightness does not adjust. The fn keys ...
2
votes
2answers
7k views

unable to change brightness settings in sony vaio e series laptop

I am using Sony Vaio E Series VPCEH25EN laptop. I installed ubuntu 12.04 64 bit version and I couldn't change my brightness level. Always it is showing max brightness, I tried to change by using ...
1
vote
2answers
2k views

Sony VAIO SVT1311 brightness change doesn't works

I bought the new ultrabook Sony VAIO SVT1311. Many things work but brightness control doesn't. I see the splash bubble (that reacts to Fn+F5 and Fn+F6) but the brightness doesn't change. It stays ...
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 ...
5
votes
3answers
5k views

Why does Ubuntu reset brightness settings at the loading screen?

Since I first installed Ubuntu 11.10, I noticed that volume and screen brightness get reset every time Ubuntu starts. Why is this so? And what ways are there to keep brightness and volume levels ...
3
votes
4answers
6k views

Screen backlight control for Asus G55V

I've just installed Ubuntu 12.04 on an Asus G55V laptop and neither the laptop brightness control keys (FN+F5, FN+F6) nor the Brightness setting are able to control the backlight. Note that I've ...
1
vote
1answer
2k views

Cannot Adjust Brightness on Acer Aspire 5332

I recently installed Ubuntu 12.04 with the Windows installer. It appears to be running fine, however the screen is extremely dull and I don't appear to be able to adjust the brightness... I entered ...
108
votes
20answers
103k 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. ...
3
votes
1answer
1k views

How can I get a command to run before login (ie while booting or just after)?

I have an encrypted home folder, so I can't log in automatically (and I wouldn't want to) but also my display defaults to the minimum brightness at each boot. To fix this I run the command ...
0
votes
2answers
348 views

How to configure screen brightness when not using a laptop

For a way too strange reason, my TV (which I'm using with a Dell Inspiron 1145 laptop running Ubuntu 11.10) does not allow me to do a fine-grained brightness configuration. Therefore, I'm looking for ...
7
votes
2answers
5k 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 ...
2
votes
1answer
2k views

How do I get brightness controls working properly on an Eee PC 1001P?

Is there a solution to the low screen brightness issue with the Eee PC 1001P and release 12.04? When I use the brightness control, the screen goes through three adjustment cycles of dark to semi ...
2
votes
1answer
768 views

Screen brightness in Ubuntu not working

Hardware: HP DVD6t, AMD Radeon 6700 OS: Natty 32-bit. I have researched a lot on this and basically most of the solutions that are on the internet / stackexchange revolves around the brightness ...
1
vote
2answers
779 views

Packard Bell TS11HR-068GE brightness control doesn't work

i did search in google but haven't find anything about this problem for my model laptop: Packard Bell TS11HR-068GE the graphic card is: NVIDIA GeForce 610M i am newbie on linux & ubuntu, so pls ...
0
votes
1answer
730 views

Brightness Controls not working on Sony Vaio VGN FZ31S NVidia G8600M

since I installed XUbuntu 12.04 on my notebook, brightness controls are no longer working (they used to work before with Smartdimmer). I tried several suggestions, starting from gnome-settings with ...
0
votes
2answers
383 views

Brightness level is not restored back after some idle time when using fglrx

I have a laptop powered by fresh installation of Ubuntu 12.04 with XFCE. Before I have used a default opensource ATI driver. For several days I have been using fglrx. After some time of inactivity ...
77
votes
9answers
129k 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
824 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 ...
8
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 ...
6
votes
5answers
33k 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
781 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 ...
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
701 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
747 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 ...