Questions related to screen brightness.

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3
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0answers
115 views

Lowest brightness setting turns backlights off

I am running Ubuntu 14.10 on a Laptop. When I turn my brightness to the lowest setting it actually turns my backlights off and my entire screen goes black as if my computer was turned off. I have ...
3
votes
0answers
396 views

Ubuntu 14.04 + Bumblebee, Unable to control Brightness and have Bumblebee working at the same time

I'm current running Ubuntu 14.04 with a GTX 780m gpu on my laptop and using nvidia-331 drivers with bumblebee. I was unable to control the brightness of my screen, but then I decided to follow some ...
3
votes
0answers
307 views

Ambient light sensor support

I have a 2010 Sony Vaio laptop running Ubuntu 12.10, with an ambient light sensor installed to adjust screen brightness automatically. However, last time I checked, this was not supported by default ...
3
votes
0answers
333 views

Fn key combination *suddenly* stopped working for brightness only

I've looked at most of the questions relating to enabling hardware brightness control under Ubuntu with the Acer Aspire S3 laptop; initially these fixes worked, under the initially installed kernel ...
3
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0answers
399 views

Custom Keyboard Shortcuts Not Working

Hi I have created two custom keyboard short cuts as my brightness settings have disappeared since installing Nvidia Driver. These two short cuts are as follows: name: brightness_up command: ...
3
votes
0answers
303 views

Laptop brightness keys have a delayed effect or none

My laptop is a Gateway NV52L03H, Amd Radeon HD 7520G using the AMD FGLRX drivers. Most of my laptop's Fn (function) keys are working properly and as they should. The only one misbehaving are the ...
3
votes
0answers
645 views

Is it possible to change a laptop's screen-dimming capabilities?

My laptop is able to dim it's screen automatically until it is turned off by Ubuntu to save power, currently my dim screen button doesn't let me turn off my screen completely, my questions are: Is ...
2
votes
0answers
36 views

How to link brightness button to correct brightness script

I recently upgrade my Ubuntu from 12.04 to 14.04. My laptop has always had incomtibility issues between the brightness button and the actual brightness set up. In 12.04 I had fixed the problem by ...
2
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0answers
41 views

How do I stop the lock screen from dimming to black?

I've spent a ton of time searching for this on Google, and I still can't seem to find it. Please read fully before answering, because the majority of the answers I'm finding are about preventing ...
2
votes
0answers
180 views

Toshiba u840: Hotkeys don't work after upgrading to 14.10

I've already tried the solutions presented here: Upgraded to 14.10, brightness control quit working - Intel HD 4400 and here: Brightness keys don't work on a Toshiba Satellite t110 with no ...
2
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0answers
543 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 ...
2
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0answers
390 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 ...
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0answers
59 views

Black screen after screen off on 13.10

I swtiched "Turn screen off when inactive for" to 3 minutes and Lock screen after screen goes off to on. The problem is that after the screen is off, when I try to come back I can`t do anything, the ...
2
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0answers
1k views

Can't control screen brightness on saucy on Acer Aspire 5755 and Acer Aspire V3-571G

I can't control the screen brightness in Ubuntu 13.10. I tried the way that worked for me on 12.04, 12.10 and 13.04: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" but it doesn't work on 13.10. My ...
2
votes
0answers
3k views

Default Keyboard brightness is not working

I am running Ubuntu 13.04 64-bit on an Asus UX31A. To control the default screen and keyboard brightness after the start, I wrote this to the rc.local: echo 0 > ...
2
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0answers
196 views

Amd catalyst drivers increases screen contrast if laptop is on battery power

How to prevent catalyst drivers from increasing contrast if I switch from power supply to battery power? One oddity about this is that increase in contrast isn't shown in the drivers settings, e.g. if ...
2
votes
0answers
407 views

ATI HD 6320 ASUS Brightness doesn't change

When i press Function + [F5 or F6] to increase or decrease the brightness, the adjustment display on top right pops out and the slider moves but the screen brightness remains the same. i've done ...
2
votes
0answers
350 views

How to adjust brightness in games with Radeon driver?

I recently installed Lubuntu 12.10 on an older laptop, an HP Pavilion zv6000. It runs GREAT with one exception. I am unable to adjust the brightness in any games. I realize I am stuck using the open ...
2
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0answers
199 views

Bright/Dim Controls Wont Work In 12.04

I have a gateway nv54, and the controls wont work to brighten or dim the screen. The only way it does is if you change it to the setting you want, then restart the computer. Any suggestions/drivers ...
1
vote
0answers
82 views

Laptop with Ubuntu Mate 15.04 screen dimming after 10 seconds

I watch movies on Youtube, Popcorn or XBMC and after 10 seconds when I have my laptop disconnected from power the screen dims. I know that there is an option in dconf-editor for longer timeout but ...
1
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0answers
25 views

Error request power-well from i915 ( Lenovo L440 - Ubuntu 14.04)

I'm using Ubuntu LTS 14.04 on my Lenovo L440 and until yesterday I hadn't experienced any problems, when I started my laptop and received the error message: [ 3.331621] hda-intel Error request ...
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0answers
27 views

How do I fix an login error ( black screen with cursor on top left corner )?

Actually I've faced problem in adjusting the brightness in Ubuntu 14.04 LTS. Afterwards, I've configured the "20-intel.conf" file with the following command sudo gedit ...
1
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0answers
276 views

Ubuntu 15.04, brightness setting reversed

I just have installed Ubuntu 15.04 (64bit, installed in EFI) on my Packard Bell laptop and the problem I am facing is really annoying : The brightness setting is reversed: Brightness 0% : black ...
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0answers
178 views

Screen brightness issue Toshiba Portégé after 15.04 upgrade

I have a Toshiba Portégé Z30-A-13P. I can no longer adjust my screen brightness after upgrading Ubuntu to version 15.04 (Kernel 3.19). The screen brightness (as well as the touch-pad) didn't work ...
1
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0answers
154 views

Can't change screen brightness running Ubuntu 14.04LTS on Samsung NP510R5E

FIXED! After DBANing my hard drive I installed Ubuntu 14.04LTS and quickly realised I've been unable to change screen brightness. This isn't too much of an issue when AC power is plugged in as the ...
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0answers
32 views

Display Settings on AC and Brightness key

I have recently installed Xubuntu 14.02 on a Lenovo Thinkpad E555 I got everything working however I have had these problems: When connecting AC power to the computer the Display Config comes up. ...
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0answers
63 views

Strange boot issue (purple screen)

I'm somewhat of a noob when it comes to this kind of stuff, but I am a computer science student so I am familiar with operating systems. Anyway, I'll try to be as detailed as possible in describing ...
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0answers
76 views

Screen Brightness Hotkeys with NVIDIA Graphics Card

I just installed the Ubuntu 14.04 and I'm loving it. I've used other versions before, but it's getting better and better. But there's one problem: screen brightness. I use an LG R570 laptop, with an ...
1
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0answers
354 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 ...
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 ...
1
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0answers
187 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
105 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 ...
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0answers
63 views

Brightness controls buntu 14.04 / Dell Inspiron

My laptop keyboard brightness controls do not work after the screen has been turned off by the power management - logging of and back on brings back the brightness controls. Similar behaviour occurs ...
1
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0answers
109 views

Apple Cinema LED Display: using regular brightness controls?

I have a Dell Latitude E6430 laptop, running Ubuntu 14.04, connected to a 27" Apple Cinema LED Display (which works fine). By tweaking the appledisplay kernel module a little bit, I can even get ...
1
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0answers
126 views

How to disable dynamic contrast in Kubuntu?

My environment is kubuntu 14.04 and graphic card is nvidia GTX 560. The problem is with dynamic contrast changes. For example when I open "bright" webpages it looks like monitor is brightening up as ...
1
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0answers
84 views

How can I adjust screen brightness on Toshiba C665-X5010?

I am using Toshiba C665-X5010 laptop having NVIDIA GeForce 315M GPU. I have installed Ubuntu 14.04 recently and I couldn't adjust my screen brightness. Please help me.
1
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0answers
72 views

I removed Windows 8 and installed Ubuntu 14.04, now my fn keys to manage brightness and volume don't work and I can't boot into BIOS

To clarify, this isn't a dual-boot, I just have Ubuntu now. My FN keys are no longer working on my ASUS K55n, this includes changing my brightness and volume. I've already tried editing the GRUB ...
1
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0answers
129 views

Keyboard Backligth is set to Maximum in every reboot

At every reboot my screen backlight and my keyboard backlight were set up to maximum level on every reboot. Reading this article: How do I set default display brightness? i've solved the problem ...
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0answers
69 views

How to add brightness key to dconf

I recently downloaded Ubuntu 14.04 and did a clean installation. I noticed that Ubuntu 14.04 does not store screen brightness settings. Who can I add a value to dconf to store brightness settings. I ...
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0answers
206 views

how do I turn off webcam brightness auto-adjust?

My Logitech webcamera adjusts brightness automatically and I don't like it. I wonder how I could turn this feature off from ubuntu. I downloaded v4l2ucp that seems to be a program to do just that, but ...
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0answers
84 views

Brightness keys do not modify actual brightness

I am really new to linux, sorry if this is an easy question. I recently installed Ubuntu on an old macbook with next to no issues, except for the fact that the backlight does not respond to the ...
1
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0answers
116 views

Acer Aspire 7741z : Function key adjust brightness but displays 10% in Ubuntu 14

On my Acer my brightness function key works, but the confirmation display only goes up to about 10%. Also the function key seems to be the only thing that will adjust the brightness. I cannot adjust ...
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0answers
470 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 ...
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0answers
57 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 ...
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0answers
219 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 ...
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0answers
727 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 ...
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0answers
876 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 ...
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0answers
33 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?
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0answers
82 views

How can I adjust the brightness on an HP Envy dv7?

I have an HP ENVY dv7. When I was running Windows 8, I could tweak the brightness to my heart's content. Now, I'm limited to only the first five clicks on the brightness bar. After that, same max ...
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0answers
123 views

How to decrease step of XF86KbdBrightnessDown and XF86KbdBrightnessUp handlers on Ubuntu

My hardware supports full 256 steps of screen brightness. Unfortunately Ubuntu's default brightness driver uses wrong steps: I need to increase granularity of steps in the dark end of the spectrum, ...