Questions related to screen brightness.

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5
votes
3answers
6k views

Screen brightness control not working on Lenovo T530

My brightness control doesn't work with a fresh install of 12.10 (brand new laptop). It is set to the brightest setting when I boot up and when I try to change it, I see the notification bar come up ...
1
vote
0answers
294 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
60 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
2k 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
50 views

Ubuntu 13.10: Medion Aykoya P6630 Brighness changing issues

So I have tried a few things already with sudo gedit /etc/default/grub and changed the GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux ...
0
votes
1answer
238 views

Brightness function keys problem

I have an HP 650 notebook, and I just finished installing ubuntu 13.10 . The problem is that brightness function keys don't work ( f2 and f3 ). I tried changing GRUB_CMDLINE_LINUX_DEFAULT and updating ...
0
votes
1answer
77 views

Dell laptop screen brightness is not working after upgrade from 12.04 to 13.10

I tried with GRUB_CMLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" and sudo update-grub but did not worked.Please help me out
1
vote
0answers
84 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 ...
4
votes
8answers
32k views

How do I adjust the screen brightness on an Acer Aspire One D270?

My system specifications are: Ubuntu 12.04, 64-bit, Acer Aspire One D270, Intel Atom CPU The usual brightness increase/decrease key combination using Fn key doesn't work in Ubuntu as many pointed ...
0
votes
0answers
46 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
59 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 ...
31
votes
7answers
40k 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 ...
0
votes
0answers
372 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!
19
votes
7answers
14k views

How can I change brightness through terminal

Now I can change it by Fn+ arrow right but now I need to do it via my shell script
1
vote
0answers
243 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
134 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. ...
1
vote
1answer
82 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 ...
7
votes
2answers
357 views

Stop Screen Dimming After 60 Seconds (MacBook running 12.04)

I'm running Ubuntu 12.04 on a MacBook air - everything works fine, apart from the fact that the screen dims after 60 seconds of activity. Is there any way to stop this? My computer is on mains ...
0
votes
0answers
75 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 ...
5
votes
1answer
1k views

Error when running gtk-redshift

I'm getting this error when I run gtk-redshift from the CLI (it just doesn't start if I start it from the GUI): (process:3862): GLib-GObject-CRITICAL **: g_type_instance_get_private: assertion ...
0
votes
1answer
136 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
185 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
194 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 ...
3
votes
1answer
3k views

Ubuntu 14.04 - brightness problem in HP hybrid laptop

In a HP sleekbook 15 laptop I managed to install NVidia driver and also quick switch graphics is working. When NVidia card is active I can adjust the brightness using keyboard but when intel card is ...
3
votes
0answers
382 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 ...
0
votes
0answers
155 views

My Laptop Not Charging And Brightness Keys Not Working After Installing Ubuntu 12.04.3 LTS

I have Lenovo(G-505s) Laptop with per-installed windows 8. Recently I'm installed Ubuntu 12.04 through CD. But after installing my laptop battery not charging and my brightness keys not working in ...
4
votes
3answers
2k views

Can I control brightness on second monitor?

I have a thinkpad (x301) with an external monitor connected via a DisplayPort to HDMI cable. I can control the brightness of the laptop monitor using the keys on the laptop, but I can't work out how ...
0
votes
0answers
30 views

xrandr works at startup, but when I type something, the bad brightness returns

I put a script for xrandr working at startup, its good. but when I type something, the bad brightness returns. When I re-put "xrandr --output LVDS1 --brightness 0.55" on a terminal, all is good. Why ...
0
votes
0answers
46 views

Blackscreen like DOS after press F5

This is the first time I use Ubuntu. (Actually, I've used Ubuntu 10.10 before, but now I'm going back to Ubuntu because my Windows encounters bugs and isn't stable) My trouble here with my Dell 14R ...
0
votes
0answers
120 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: ...
7
votes
5answers
9k 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 ...
5
votes
1answer
851 views

How to increase the screen brightness control sensitivity?

In Ubuntu 13.04, when I use the keyboard hotkeys to control my screen brightness, I only get 5 steps to go from the darkest to the brightest level, for a total of 6 levels. However, I noticed a ...
0
votes
1answer
164 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 ...
10
votes
0answers
715 views

How to disable KDE's brightness OSD?

I am using lightum to automatically control the screen's brightness depending on the surrounding light (on a Retina MacBook Pro). The problem is, though, that KDE picks up the change and displays the ...
3
votes
2answers
2k views

Brightness settings from terminal

I do change the Turn screen off when incative for: often using the below screen in Ubuntu 12.04. How do I change the same from the terminal? I did check in the gconf-editor, but couldn't figure it ...
1
vote
0answers
31 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?
0
votes
4answers
1k views

adjust the brightness in 13.04

I have a dual graphics card: intel 4000 and nvidia 630m... I installed bumblebee and intel drivers from their website. I thought the brightness problem will be solved by installing these drivers. ...
13
votes
5answers
8k views

What commands will change my screen's brightness?

I'm trying to re-keybind some of my function keys as I never use them for multimedia purposes, however I'm not sure as to what command I'd need to put it to increase/reduce the brightness, I'm talking ...
0
votes
1answer
37 views

Ubuntu 12.04 in a 2 months old Toshiba Satellite

I installed Ubuntu 12.04 in a 2 months old Toshiba Satellite C75 AMD A6-5200 APU with Radeon(TM) HD Graphics × 4 and 4gigs of ram. It doesn't detect my laptop internal wireless card only my external ...
0
votes
2answers
4k views

How should I control the brightness on my Ubuntu 14.04 system? [duplicate]

Brightness control button is changing brightness value in file /sys/class/backlight/acpi_video0/brightness, but screen brightness is not changing.
0
votes
0answers
125 views

How do I un-dim my computer screen after I close the lid in xubuntu?

I have recently installed xubuntu on top of normal ubuntu on my computer. A problem that is really bugging me is that whenever I close the lid on my computer, it will go to sleep, as usual, but when I ...
0
votes
0answers
45 views

Brightness doesn't change in sony vaio

I am using sony vaio with ubuntu 12.10 in dual boot with windows 7 and AMD RADEON graphic card. Brightness settings are not working in ubuntu and it is releasing lots of heat. Please help me how to ...
2
votes
2answers
367 views

Is there a way to make Ubuntu adjust the screen brightness automatically?

Does anybody know where I can find a program (or system setting) which turns up the brightness automatically when my laptop is plugged in to AC and turn down the brightness when disconnected from AC? ...
1
vote
5answers
5k views

Function keys are not working on Toshiba Satellite L510 so brightness control is not possible

I am using Toshiba L510 AND Ubuntu 12.04. I Cannot control brightness of my system using function keys. What could be the cause?
0
votes
0answers
249 views

AMD screen-brightness adjustment issue with Trusty Tahr

I upgraded to 14.04 just today and since I'm now using kernel v3.13 and according to This link, I should now be having better support for AMD grapahics. Is it possible to fix the screen-brightness ...
2
votes
0answers
917 views

Settings for display brightness not saved in Ubuntu 14.04 [closed]

I have bought HP ENVY 15t laptop and installed Ubuntu 13.10 on it. The first annoying thing I faced with was restoring brightness settings to 100% after reboot. So I had to adjust it every time I ...
3
votes
1answer
138 views

Dim inactive compiz ( set speed of the effect)

I just enabled the dim inactive effect in compiz on ubuntu 13.04 and my question is: How can I speed up this effect? With this I mean how can I reduce the time it takes to make the background less ...
0
votes
0answers
53 views

fglrx brightness and black screen

In a HP 2000 Notebook PC and ubuntu 13.10, when I change the radeon driver for the fglrx, glxgears show more fps, but any brightness change make a black screen for one second. With the radeon driver ...
0
votes
0answers
32 views

Different problems with my 13.10 system

Hello guys, I'm a real newbie in using ubuntu, but I really, really like it. I'm facing 2 different and annoying problems tough, so I hope you guys can help me out with this. First Problem: I have ...