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Questions related to screen brightness.

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0
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0answers
10 views

I have to shut down and restart to adjust brightness

Occasionally when I turn on my laptop, I am unable to adjust the brightness. Once I shut down and restart Ubuntu, I can do this, but it is becoming more frequent and inconvenient.
0
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0answers
101 views

Ubuntu 14.04 second display brightness problem

Few days ago I have setupped Ubuntu 14.04. I'm using laptop and second monitor via HDMI cable. Now every about 1-2 minutes my second monitor's brightness changes (increase after that decrease and ...
0
votes
1answer
167 views

Fan under load doesn't go full speed on Acer laptop

On Ubuntu 14.04 when I do any system intensive task like gaming and when temperatures reach over 80C for CPU and 70C for GPU, fan doesn't spin as fast as it does in Windows 7 under even lower temps. ...
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0answers
27 views

screen brightness limited when using keyboard

When I use my laptop's keys to change brightness, I can only go to a certain max. See image: If I use the brightness setting (standard Brightness & Lock app), I can put it to max brightness ...
0
votes
1answer
1k 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 ...
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0answers
22 views

Cannot Change Brightness in kde 4.9

So I installed kde on my linux ubuntu 12.04.4 lts kernel 3.11 and I cannot use the brightness keys to change the brightness. I can use the echo 20 | sudo tee ...
0
votes
1answer
494 views

Monitor not turning off in 14.04

I have a freshly installed ubuntu 14.04. In settings "Brightness and locking" I had the following Settings: Turn monitor off after "10 Minutes" Locking: On Monitor locking after "5 ...
1
vote
1answer
43 views

What to choose as application to launch Brightness-Controller?

I'm new in *ubuntu. I'm using lubuntu 14.04. When I'm trying to download Brightness Controller it is saying This link needs to be open with an application. Which application to choose? Actually ...
0
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0answers
98 views

Turn off screen when inactive ONLY on battery power

In the "Brightness and Lock" settings there is a nice feature to automatically turn off the screen after a period of inactivity, but I only want to do this on battery power. When plugged in, I always ...
1
vote
0answers
357 views

issues with ASUS S301L ultrabooks

I just like to tell you what still is a Problem in Ubuntu 14.04 and should be solved for a nice experience of this distribution. Intel open source Graphics issues (proprietary) When attaching ...
0
votes
2answers
121 views

Nvidia Drivers break several hot-keys on Ubuntu 14.04

I have a ThinkPad W530, which has Optimus. When I am running the NVidia card with Nouveau or the Intel integrated card with Intel drivers, the Microphone mute, ThinkVantage key, and brightness works ...
0
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0answers
145 views

Restore laptop screen brightness when unlocking screen

My config is the following: - Ubuntu 14.04 - An ASUS laptop - An additional LCD screen connected through VGA I control my additional LCD screen's brightness with dedicated controls located directly ...
0
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0answers
50 views

Brightness not changing Dell 15r SE and ubuntu 12.04

With my current laptop I can't change my brightness anymore I tried xbacklight -set 50 (nothing happened) and also changed this line grub_cmdline_linux_default= "quiet splash" to ...
1
vote
2answers
658 views

How do I get brightness controls working on a Sony VAIO Fit 15E?

I have a problem with my brightness setting. When I decrease brightness to 1 and I reboot the computer, it reset to maximum brightness value. I tired to adjust it and decrease it again to 1. Why the ...
-1
votes
1answer
87 views

Brightness Problem in Ubuntu 14.04

whenever i turn on ubuntu brightness increases to 100% always. i manually have to lower it to somewhat around 60%.how to set it permanently to your choice,so that whenever i turn on ubuntu it remains ...
0
votes
1answer
201 views

Brightness Resets on Boot/Reboot in Ubuntu 14.04

As the question statement explains itself, I'm on Ubuntu 14.04 and my screen brightness is reset to maximum after every boot, no matter how many times I reset. I applied the solution provided here ...
0
votes
0answers
42 views

Every time to boot my system, the brightness get reset to 100%

Earlier , I couldn't even change the screen brightness by any means(Fn keys and Brightness settings).Then I came across a solution , which required me to edit the following lines ...
2
votes
1answer
210 views

How to set automatic brightness in macbook pro?

I have just installes ubuntu 14.04 in my macbook pro, and I already configure all but the keyboard and screen brightness. In OS X, the brightness is controled automatically, I want to know if this is ...
0
votes
0answers
104 views

Max Brightness in ubuntu lower when compared to windows

I've installed Ubuntu 14.04 on my (new) ThinkPad Edge330. Everything worked quite well so far. I've noticed that the screen wasn't that bright and was a bit disappointed of the ThinkPad, but then I ...
3
votes
3answers
3k 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 ...
2
votes
0answers
447 views

Brightness fn key adjustment problems

My brightness function key controls work after setting grub boot parameter to "acpi_osi=" but using them I cannot adjust the brightness higher than around 70% (there is empty bar left over and I can't ...
0
votes
1answer
48 views

I am unable to see anything on the screen while using any version of Ubuntu [duplicate]

Every time i install Ubuntu either 12.10 or any version of Linux mint it install well but i cannot be able to see anything on the screen on when i use a DESKTOP screen by connecting on a VGA that time ...
1
vote
2answers
273 views

Brightness keys no longer work

My Fn+F8 and Fn+F9 keys to change the screen's brightness appear to no longer work on my Thinkpad laptop. # ls /sys/class/backlight/ thinkpad_screen Some guide told me to make this: # cat ...
0
votes
3answers
907 views

Brightness control in Ubuntu 14.04 on Sony Vaio?

I recently installed Ubuntu 14.04 LTS on my Sony Vaio [nVidia GeForce 410M/PCIe/SSE2]. Earlier I had 12.04 installed on it, then I edited the xorg.conf file to control brightness using the function ...
1
vote
0answers
423 views

Ubuntu 14.04 Intel Brightness After Resume

I recently installed Ubuntu 14.04 on my Dell Inspiron laptop. Seeing that my hotkeys didn't work, I followed the instructions here and everything was going smooth. Except for when I close the lid to ...
0
votes
0answers
77 views

HDAJackRetask issue

I have hp pavillion m6 running Ubuntu 14.04. Yesterday I followed a tutorial (http://ubuntuforums.org/showthread.php?p=12489414#post12489414) to fix my beat audio issue , after click at "Install boot ...
1
vote
3answers
3k views

Brightness fn key shortcut doesn't work on ASUS laptop

The brightness shortcuts via fn key don't work. I tried each solution from this answer and its comments. After editing /etc/default/grub file I rebooted. GRUB_CMDLINE_LINUX="acpi_osi=Linux" ...
0
votes
0answers
542 views

Brightness control does not work in Ubuntu 14:04

I have a "Inspirion 15r SE 7520" and the Brightness control doesn't work. Using amd driver, I have already added: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" to the grub config ...
1
vote
0answers
100 views

No brightness control in Brightness & Lock menu

I have Ubuntu 12.04 LTS 32bit in my Dell Latitude E5530 with Intel core i5 and graphics of Intel® Ivybridge Mobile x86/MMX/SSE2. I can change Brightness with Fn buttons but screen brightness reset to ...
1
vote
2answers
984 views

Ubuntu 14.04 brightness keys don't work anymore after dist-upgrade on Thinkpad L430

I just updated my Ubuntu system from 13.10 to 14.04. After having fixed GRUB which broke on upgrading, I run into certain other problems. One of them is that the brightness adjustment keys of my L430 ...
0
votes
0answers
54 views

samsung np350u2b screen brightness out of control after 14.04 do-release-upgrade

I have upgraded 13.10 to 14.04 on my samsung np350u2b notebook. everything works fine except that when I put the notebook into standby then powerup again, screen backlight becomes darker and I cannot ...
0
votes
1answer
66 views

Volume level not remembered after shutdown/restart

I'm using Ubuntu 14.04 and the volume level always starts at 100% when I turn on the computer. Is there a way for the volume level of the previews session be remembered in the new session? (and can ...
0
votes
0answers
502 views

Brightness control not working Aspire 4352-2852 Ubuntu 14.04 LTS

I'm a newbie in Ubuntu and so far it has worked really good, but there is one small problem, I can't control the brightness. The brightness control shows on the screen but it doesn't change anything, ...
0
votes
1answer
92 views

I can't change my brightness setting on my computer [closed]

Whenever I try to change my brightness setting, it doesn't change. Please help me with this!
7
votes
4answers
7k views

Screen brightness isn't taking effect on a Lenovo Z570

My Lenovo Z570 has two GPU's, nVidia and Intell. Brightness control has no effect what so ever over the screen brightness, and because I've had some major issues in the past when I was trying to ...
0
votes
2answers
490 views

Change brightness on Asus G53JW with Ubuntu 14.04

I have an Asus G53JW and I can't manage to change the brightness anyhow (fn hotkeys are not working). I used Debian for 6 months and had the same issue and never found I way around this. I did ...
0
votes
1answer
360 views

Ubuntu 14.04LTS hangs when i change brightness of my display on Dell N5010 laptop

I have dell n5010 my system hang when I try to change brightness of the display and this happen only when my system on battery please help how to solve this problem
1
vote
0answers
298 views

Cannot lower brightness in Ubuntu 14.04 with amd drivers

So I cannot adjust my brightness at all. It is always at the max and I have tried updating the grub with acpi_osi=linux & acpi_backlight=vendor & acpi_osi= & acpi_osi=Linux ...
1
vote
1answer
83 views

Change the default screen brighthness

Hi im using Xubuntu 14.04 with linux 3.13.0-24 every time my screen goes dark ( activating the screen saver or so ) my current screen brightness is set to some default value how can I change ...
0
votes
1answer
93 views

Brightness control issue

Brightness notification control is not working on Ubuntu 14.04. I searched over google if there is any method to fix it but I can't find nothing which is working or reliable. This is what I got from ...
1
vote
1answer
187 views

Samsung Keyboard Brightness Keys

So I've recently installed Ubuntu 14.04 (kernel: 3.13.0-24-generic). It's mostly working with my Samsung NP540U4E laptop, just having some trouble with the keyboard brightness change function keys. ...
0
votes
1answer
140 views

brightness level saving problem

I am using Ubuntu 14.04 and I want to save my brightness level, because every time when I start the computer the brightness level is maximum. thanks, Kolyo ls -l /sys/class/backlight: total 0 ...
0
votes
0answers
194 views

Brightness adjustment not working on Ubuntu 14.04

My netbook keyboard has a brightness adjustment key, with which the brightness adjustment was successfully working till I updated to 13.10. Now the brightness adjustment fails. This link (Display ...
1
vote
1answer
210 views

Question about /etc/default/grub

I had previously changed the GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" in order to change my screen brightness with the keyboard ...
4
votes
1answer
2k views

Ubuntu 14.04 Brightness issue with nvidia Quadro

I recently upgraded from Ubuntu 13.10 to 14.04. Everything is fine, except the brightness of my laptop screen. When I change the brightness the screen simply does not respond. I figured this was a ...
1
vote
2answers
247 views

Brightness controls mismatch

This seems to be a hardware issue rather than a Ubuntu issue, but nevertheless, here goes. I have an Acer ao756-2617 with Ubuntu 14.04, elementary os luna, bodhi linux, and zorin os 8. most of these ...
0
votes
0answers
130 views

No WiFi, Brightness adjustment after returning from sleep mode, and Hibernation function with AMD Radeon HD 6480G GPU

I have the following GPU: $ lspci | grep -i vga 00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Sumo [Radeon HD 6480G] I've tried with the following drivers: ...
0
votes
1answer
179 views

Brightness Save on Reboot

I have a problem where the brightness does not save after a reboot on 14.04 LTS, but I had the same problem on 12.04 LTS (before I broke the system). Before you say this is a duplicate of a million ...
3
votes
0answers
398 views

Ubuntu 14.04 locks screen without dimming during fullscreen video playing?

I upgraded from 13.10 to 14.04 yesterday, and it appears that something has changed concerning how screen dimming works during fullscreen video playback. This problem does not occur during video ...
1
vote
0answers
32 views

Ubuntu 12.04.3 LTS retaining screen brightness

Is it possible that Ubuntu retains screen brightness settings used in the previous session after the computer is turned off. If so how can I achieve this effect?