Questions related to screen brightness.

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0answers
6 views

Replacement Screen problem

so I had a broken screen and I replaced it myself and now when ever I turn on the laptop it boots to ubuntu because that's my only os and when it's booting the screen it gets brighter and brighter and ...
1
vote
0answers
18 views

Dell Chromebook 11 - unable to set backlight and /sys/class/backlight/ empty

I have installed Lubuntu on my Dell Chromebook 11 and everything works except for the backlight. Can't set the backlight with the keys, neither with xbacklight,xdotool or any other GUI tool. I tried ...
0
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0answers
4 views

Brighness controls on Toshiba Tecra

The brightness controls do not have any visible effect on my Toshiba Tecra W50. I tried every combination of acpi_brightness=vendor and acpi_osi=Linux to no avail. How can I change my screen's ...
0
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0answers
18 views

LXLE 12.04.5 on Sony Vaio VGN-T150, Fn keys and volume keys don't work

I have a Sony VGN-T150 ultrabook that I've had since 2005; it's a Pentium M 1.1ghz (ULV 733) with 1GB RAM, running LXLE 12.04.5. It came with WinXP, but I've transitioned from Windows to Linux about 6 ...
4
votes
5answers
5k 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 ...
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votes
0answers
27 views

Installed Ubuntu 14.04 corrupted? Several settings icons have vanished

I think my Ubuntu 14.04 installation may have become corrupted. I wanted to turn down the brightness of my laptop running Ubuntu 14.04 as I was going to be on battery power for a few hours, but the ...
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0answers
17 views

Change default behavior of Fn+Funtion key

I have the latest version of Ubuntu 14.04 installed on my Toshiba Satellite C55D-B5212. All of the Fn key combinations work correctly except the brightness down and brightness up ones (Fn+F2 and ...
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1answer
87 views

Ubuntu 14.04 brightness problem

My brightness controls weren't working before but I didn't really care, but somehow I lowered my screen brightness while downloading league through playonlinux. Now the brightness controls aren't ...
0
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0answers
32 views

Suspend and hibernate break brightness adjustment

I am currently using Ubuntu 14.04 (architecture is amd64) with kernel version 3.13.0-44-generic on an HP Pavilion g7-1350dx. Output of lspci | grep -i vga to find GPU is as follows: 00:01.0 VGA ...
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0answers
33 views

Screen dim while brightness set to max on Xubuntu 14.04 everytime display turns off

I used to have an issue where every time my laptop would return from suspend, the screen was fully dim (as if brightness was at a minimum) even though the brightness setting was set to maximum - so I ...
0
votes
1answer
31 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: ...
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vote
2answers
5k 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 ...
0
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0answers
19 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 ...
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3answers
97 views

Brightness Fn keys suspend the notebook

In Ubuntu 14.10, everytime I press any of the "Brightness Fn keys" the notebook suspend, by the way the "Sleep Fn key" does nothing at all. Is there a way to remap all the Fn keys manually? Thanks!! ...
2
votes
3answers
721 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
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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
140 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
113 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
61 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
224 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 ...
1
vote
1answer
4k 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
0answers
27 views

Laptop Brightness not remembered on Power Plugged in

On Ubuntu 14.10 Utopic, using a Samsung Notebook laptop, I can change the brightness correctly and it is remembered upon wake from sleep. However my problem is that when my laptop is on battery and I ...
0
votes
2answers
42 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
1answer
5k views

atheros wireless ar9285 driver

I have been having problems with wireless on Ubuntu 10 and above, Mint 11 and above. The problem is in the driver for the wireless... I can see that there is no driver installed and yet it works but ...
0
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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
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0answers
73 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?
0
votes
1answer
10k views

Unable to adjust brightness in Ubuntu/Xubuntu/Lubuntu13.04

I've recently upgraded to Xubuntu 13.04 and noticed that I'm unable to use the brightness keys to adjust the brightness of my screen. I've tried just about everything this thread suggest and I'm still ...
0
votes
0answers
95 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 ...
1
vote
0answers
171 views

screen brightness control not working: Lenovo g50-45: AMD Radeon: Ubuntu 14.04

I've a Lenovo G50-45 machine with AMD processor [Radeon APU A4-6000 with R2 Graphics]. I tried the solution from Rmano but no success. Using Ubuntu 14.04. I tried the solution pasted here: [Ubuntu ...
2
votes
2answers
356 views

Ubuntu 14.04 LTS: FN-Brightness Key Stopped Working

Hello dear Ubuntu Community, After i installed some Ubuntu Updates on my PC,my FN-Key stopped working. (But i can still change it in the System settings. I tried many ways to fix it trough the ...
0
votes
0answers
38 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
40 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 ...
4
votes
4answers
14k 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 ...
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votes
0answers
31 views

Can't adjust brightness after suspending

I just installed Mint 17.1 (Couldn't find a Mint StackExchange, but it's based on Ubuntu) on an 11" Macbook Air. It works fantastically well right out of the box, however, if I suspend the computer, ...
0
votes
0answers
80 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 ...
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votes
0answers
49 views

I cant change the brightness in apire v3 571g [closed]

i am using aspire v3 571g. OS is windows 8.1 pro. whenever i am changing the brightness the arrow is changing but bright have no any change. I need help to overcome this problem
0
votes
1answer
433 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
4k 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
2answers
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 ...
0
votes
1answer
52 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
159 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
278 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 ...
3
votes
4answers
5k views

Cannot change backlight brightness Ubuntu 14.04

This morning I found that I cannot change the brightness of my Dell XPs 13 laptop's display anymore. I tried the following to change the brightness Use keyboard brightness keys Run the commands ...
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 ...
4
votes
0answers
99 views

“monitor brightness down” key resets brightness before lowering it

My monitor brightness down key resets my brightness before lowering it, effectively leaving me at near max brightness. I do not experience any problems with the brightness up key. I'm using a Dell ...
1
vote
1answer
70 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 ...
7
votes
5answers
21k 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
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 ...
68
votes
15answers
56k 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. ...