Questions related to screen brightness.

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5
votes
1answer
190 views

Can't change brightness after disconnecting second monitor

When I boot up with 2 monitors, or when I connect the second monitor to my laptop, I can change brightness of the laptop screen in the usual sense. After disconnecting the second monitor, when I ...
0
votes
0answers
17 views

Replacement Screen problem

I had a broken screen and I replaced it myself and now when ever I turn on the laptop it boots to Ubuntu and when it's booting the screen it gets brighter and brighter and becomes so bright that can't ...
4
votes
5answers
6k views

Brightness Adjustment on Desktop Computer

I have Ubuntu 12.10 I need an application/software that can increase and decrease my brightness. I know I can do it through my pc monitor but I don't want that. I want to control it through a ...
4
votes
6answers
4k views

Can't adjust brightness on a Sony Vaio T13 ultrabook

I recently installed Ubuntu 12.04 alongside Windows 7 in a Vaio T13 ultrabook. I cannot use the the Fn+F4 or Fn+F5 to change the brightness. The bubble appears indicating that brightness is being ...
0
votes
1answer
1k views

What is the difference between GRUB_CMDLINE_LINUX and GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub

I'm troubleshooting a fn-key brightness control problem on my laptop, so I'm wading through a lot of config options in /etc/default/grub, as you can imagine. However, it's raised a question for me: ...
0
votes
0answers
70 views

How can I disable screen auto brightness in 14.10?

I have a Samsung 730u3e with hybrid radeon graphics, that comes with sensor(s) for screen and keyboard brightness. The keyboard auto brightness works very well, I can increase/decrease or turn off as ...
2
votes
3answers
836 views

Laptop brightness

I have just installed Ubuntu 13.10 and trying to adjust my laptop screen brightness. My laptop Dell studio 1558 has a key to change the screen brightness, though I reduced brightness to zero, I still ...
0
votes
0answers
16 views

customize ubuntu with bash scripts - never turn the screen off [duplicate]

I'd like to disable the screen from dimming automatically. It is manually done in Settings > Brightness & Lock > Turn screen off when inactive for: Never. I want to do it with a shell ...
4
votes
2answers
229 views

Ubuntu brightness indicator stops working upon laptop open/close

So I installed Ubuntu 14.04 on a 2011 edition MacAir, and I had the common problem of being stuck with either full screen brightess or pure darkness, with no options in between. I installed ...
0
votes
2answers
158 views

Lenovo Thinkpad L Brightness Level Intervals

I'm using Ubuntu 14.04. Everything worked out of the box on my L440. The only thing that bothered me was the brightness levels. I can change it by pressing fn + F5 or F6, but there are only a total of ...
1
vote
1answer
127 views

Lubuntu Display brightness

Just installed Lubuntu 14.10 on my machine. I cannot change the display brightness. I have a slider in my power settings but it does nothing. Cannot post screenshot of the slider because of no rep ...
0
votes
1answer
307 views

Ubuntu refuses to boot with acpi_backlight=vendor

I bought a Dell Inspiron 14 5000 series and dual booted Windows 8.1 and Ubuntu GNOME 14.04. The brightness would not change, so I booted with kernel parameter acpi_backlight=vendor and it worked. I ...
0
votes
2answers
54 views

Ubuntu 12.04 LTS is not booting after altering a text file in gedit, how to fix?

After failing to adjust my screen brightness in Ubuntu in various ways, I tried the following guided by an answer in askubuntu. I opened the following text file sudo gedit /etc/X11/xorg.conf It ...
0
votes
2answers
3k views

Dell laptop display brightness problem

I am using Dell inspiron 15 and Ubuntu 13.04. I have hot keys on my keyboard to adjust display brightness and they work fine.But the problem is, as soon as I switch on the laptop the brightness is set ...
0
votes
0answers
219 views

I can't adjust screen brightness in lenovo Z500

I'm using Ubuntu 14.10 on a Lenovo Z500. I cant adjust screen brightness. How can I get this to work?
1
vote
0answers
184 views

Getting Ubuntu to work on Thinkpad E145

tl;dr at the bottom I just bought a brand new Lenovo Thinkpad E145, without any pre-installed OS. I wanted to get an Ubuntu distribution so i can run gnuplot and similar stuff, just things for ...
0
votes
0answers
108 views

Screen Brightness Ubuntu-Gnome 14.1 Toshiba Satellite L755

SO I have: Toshiba L755 , Nvidia backlight Here are some error messages I am getting while getting updates through the terminal: W:Failed to fetch ...
0
votes
1answer
49 views

Lower Minimum Screen Brightness

By using /sys/class/backlight/ the screen brightness can go lower than when using the function keys to do so. Is there a way to change the minimum level used by the function key method, rather than ...
5
votes
4answers
18k 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
0answers
344 views

How to disable automatic brightness adjustment in Ubuntu 14.04?

I am running Ubuntu 14.04 LTS on a Dell 3542 laptop. My problem is that screen brightness changes depending on content. I think this is called automatic (or dynamic) brightness adjustment, as I stated ...
0
votes
1answer
947 views

Function keys not working on Toshiba C-50-B

I purchased a Toshiba C-50-B-P-0010 about a week back, it did not come pre-installed with any OS. I have installed Ubuntu 14.04. The function keys are not responding properly. If i press F3 which is ...
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.
0
votes
1answer
76 views

Brightness steps twice on one keypress

I am having an issue on my HP Pavilion g7-1350dx laptop. Whenever I press the keyboard's brightness keys, I notice two things: the display brightens by two steps instead of one, and the Unity OSD ...
1
vote
1answer
284 views

Disable brightness and keyboard back-light at start-up?

I'm new with Linux and I have an issue that I have being researching and have not been able to find a solution so far. I was wondering if any help can be given. I have an Asus Q500A with Win-8 and ...
8
votes
2answers
593 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 ...
4
votes
3answers
4k 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 ...
1
vote
1answer
76 views

How do I clear up textures on my desktop?

I have an nvidia Geforce GT 430 installed, I do have the "proprietary driver" x servers setting thing, but yet everything looks kind of rough, like rough edges and with a LOT of contrast, similar to ...
0
votes
1answer
2k views

When booting ubuntu, it states: thinkpad_acpi: Unsupported brightness interface

As the title says, when I boot my pc to Ubuntu (14.04), it says something like this: [ 23.025150] thinkpad_acpi: Unsupported brightness interface, please contact ibm-acpi-devel@... And this ...
0
votes
1answer
338 views

Ubuntu 12.10 w/ Kernel 3.7.0.7 and Open Source Driver RESUME/BRIGHTNESS CONTROL

I am using an Inspiron 7520. I got a AMD Radeon HD 7730m running in switching with an Intel 4000 HD. I have updated my Open source drivers with xorg edgers and x-swat. I am running on the kernel 3.7 ...
7
votes
5answers
11k 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 ...
0
votes
0answers
91 views

change screen brightness

I've got a strange situation and I'm hoping someone can shed a light on it. I re-installed my dell laptop (and switched from unity to gnome) today and (as expected) dimming my screen didn't work. So I ...
1
vote
0answers
47 views

latest kernel killed my ThinkPad W520 hotkeys

for some reason after latest kernel/nvidia and other updates on my 12.04.5 LTS running kernel Linux ThinkPad-W520 3.13.0-43-generic #72~precise1-Ubuntu SMP Tue Dec 9 12:14:18 UTC 2014 x86_64 x86_64 ...
0
votes
1answer
590 views

Lenovo G40-45 AMD Driver match for Ubuntu 14.04 LTS

I have Lenovo G40-45 Laptop with specs : AMD A8-6410 Processor Radeon R5 M230 I use Ubuntu Gnome 14.04 LTS for the operating system, overall almost my laptop work properly with Ubuntu, but I ...
3
votes
1answer
2k views

Brightness keyboard buttons do not work on Asus 1225c

I have problem with my new netbook. I installed Ubuntu 12.10 and I can't use my brightness key's (Fn+F5/F6). When i use them OSD appears and indicates the increase or decrease of brightness but ...
0
votes
1answer
37 views

Own brightness script, problem with missing ']'

I'm starting my adventure with Ubuntu ( I'm a MS's kid :D) and I would like to create my own scripts for controlling the brightness. I know all about the xbindkeys, and how does it works, but there is ...
5
votes
2answers
793 views

How do I decrease the display brightness an Acer 5830TG?

I am facing a problem with display brightness in ubantu or other versions of linux. Runing a linux distro as live or HDD installation or inside installation, display brightness is automatically set to ...
1
vote
1answer
111 views

Screen brightness Samsung R519 with kubuntu

Kubuntu recognizes the Fn + up/down but it only changes the brightness when it goes from 85% to 71% or viceversa. I want to know an easy way to change the screen brightness. I don't care if the method ...
0
votes
1answer
67 views

Where is the laptop brightness script located?

Online I found the command: echo 1 > /sys/class/backlight/acpi_video0/brightness to set my screen brightness to the lowest possible value, currently I am grepping my entire disk for that path, ...
2
votes
3answers
460 views

Sony Vaio VPCEH18FG backlight problem

I have installed Ubuntu 12.04 on Sony Vaio VPCEH18FG but the screen brightness does not change with Fn+F5/F6 keys and /etc/X11/xorg.conf file is also not found. How can I solve this problem?
0
votes
1answer
2k views

Brightness Control Keys on Sony Vaio not working on 12.10

Hi everyone i'm having a problem that for what i have seen its very common with the latest version of ubuntu. So I updated my graphics drivers on my laptop to the latest nvidia ones but now my ...
1
vote
2answers
2k views

Display brightness setting not working in sony vaio SVE151117F

I have sony vaio SVE151117F, ubuntu 12.10.I used to see brightness animation upon pressing Fn+F6,F5 but not actual brightness of screen. I have tried to implement as said in ...
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
5answers
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 ...
1
vote
4answers
589 views

How to decrease the brightness in Samsung RV509?

I'm using a Samsung RV509 laptop with Ubuntu 12.04 LTS. Can anyone help me to decrease the brightness in my laptop?
2
votes
1answer
1k views

How do I fix the brightness on a Samsung Aura R700 Dillen?

My Problem: Since Ubuntu 10.04 I can no longer adjust the background brightness of the built in LCD-Panel. The Laptop (Samsung Aura R700 Dillen - Nvidia 8600M GT GPU) is always on a very low ...
47
votes
8answers
70k 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 ...
1
vote
0answers
103 views

gcm-calibrate without hardware sensor

My monitor won't allow me to set the contrast when using DVI. And ubuntu/gnome won't allow me to set it via software without some fancy color calibration sensor. on system settings > color the ...
0
votes
1answer
373 views

Why can't I reduce the screen luminosity on Toshiba L775?

I've installed Ubuntu on my Toshiba Satellite L775 but the biggest problem is that I can't reduce the screen luminosity, It's too too bright and I almost can't use it at night.
1
vote
0answers
115 views

Keyboard shortcut script not working

I finally gave up on getting my Fn+up/down keys to change my screen brightness on my laptop. I took a brightnessup.sh and brightnessdown.sh script and put them in /etc/acpi and then went to keyboard ...
49
votes
11answers
39k 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?