Questions related to screen brightness.

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Brightnes fn keys move brightness bar, don't change brightness level

I have an Asus laptop with an AMD processor. In the live cd, the brightness fn keys worked perfectly. However, I activated the additional drivers for fglrx-updates and 'processor microcode for AMD ...
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1answer
383 views

15.10 Brightness adjustment

I have a 2015 Thinkpad X1 Carbon that I just installed Ubuntu 15.10 on. I have noticed that there is a huge jump between the minimum screen brightness, where the backlight is completely off, to the ...
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1answer
31 views

Laptop screen brightness change seems to affect color, not backlight

I have a problem with my laptop (Acer Aspire 5750G), I can't change the screen brightness. I noticed that the only application with which I was able to change the brightness of my laptop screen is ...
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0answers
18 views

Ubuntu 14.04 LTS brightness not changing

I get a migraine if there is too much brightness and I've been searching the forums a lot and have not found a solution so far that worked for me and that is why I am posting this question. Please ...
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0answers
22 views

How to set brightness to my Last set level?

I have read a lot of Q&A to set brightness to a fixed level on startup. But that is not what I want. I want that script (/etc/rc.local ) to update itself dynamically. i.e, On every startup ...
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2answers
17 views

Issues in saving screen brightness

I have Ubuntu 14.04LTS and a HP Pavilion dv6500. My computer doesn't remember the amount of brightness everytime I turn it on. Can somebody help me with some terminal command lines? Thank you.
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0answers
10 views

Ubuntu 14.04.03 Screen dims when I plug in headset and system starts dimmed

Maybe these two are connected, so I made one question. My laptop is Dell 3542 (Inspiron 15 3000 Series) with Intel Pentium, 4GB RAM, kernel is 3.19.0-43-generic #49~14.04.1-Ubuntu SMP. When this ...
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1answer
219 views

Unable to change brightness in a Lenovo z500 laptop with Ubuntu 15.10

Brightness adjustment keys have no effect (although they are recognized by the environment), and I can't change the brightness using GUI tools as well. In Windows 10 i had the same problem and after ...
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0answers
610 views

Ubuntu 15.10(wily) Brightness control not working

The brightness buttons and the brightness control in system settings in Ubuntu 15.10 have suddenly stopped working. They were working fine at first(after I upgraded from 15.04). I have no Xorg.conf ...
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1answer
84 views

Custom command - one less than current brightness level

I tried using xbacklight, but it wasnt working so I made some custom global commands to control the brightness. For example: "Bright" : sudo bash -c "echo 20 > /sys/class/backlight/acpi_video0/...
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0answers
100 views

Hotkeys and slider for brightness don't work

I have an Intel processor with no graphics and Nvidia GTX980M with Nvidia driver. I just installed Ubuntu Gnome 15.10 and everything works fine except for the brightness controls. Changing both from ...
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0answers
35 views

Change default brightness level in Ubuntu 14. 04 LTS / Brightness is reset to Maximum on every Restart on Ubuntu 14.04 LTS [duplicate]

Recently I was going through the link below (Brightness is reset to Maximum on every Restart) and was trying to change the default brightness level on my system as its very annoying as the default ...
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1answer
111 views

15.10 Dell Vostro 3700 display brightness fn+key change problem

I have 15.10 default install, no any changes to /etc/default/grub. Now when I press Fn + arrowUp/Down I can see display brightness change notification. Moreover, /sys/class/backlight/acpi_video0/* ...
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1answer
71 views

Ubuntu screen brightness issue only at startup

Ubuntu 14.04 / Windows 10 dual boot The laptop can´t remember brightness before, but after manually set the brightness in the rc.local file, it can now remember the brightness level after boot into ...
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1answer
120 views

Brightness control is not working

The brightness control in the settings does not work. I have an Intel® HD Graphics 4000 (on a i5-3570K Processor) and run Ubuntu 14.04.03. I followed the instruction given in https://wiki.ubuntu.com/...
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0answers
87 views

Strange problem with backlight (it worked and now no more?)

EDIT : It's started working again?! i went out on friday night and i left pc ON. This morning it was working. looking in syslog i saw this : Dec 10 22:41:00 LittleHP kernel: [ 262.553256] video ...
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0answers
18 views

How can I change my brightness on my two monitors via keyboard shortcut/key

I am using Ubuntu 14.04 LTS with two monitors and an apple keyboard with brightness keys. I have done some research and have come up empty handed. I an wondering if there is any way to connect my ...
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0answers
44 views

Cron job to set screen brightness not working in ubuntu 14.04

In the terminal, I ran: crontab -e Then I added the following cronjob in the file 26 21 * * * /usr/bin/xbacklight -set 80 This was supposed to set the brightness to 80% at 9:26 PM. But its not ...
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1answer
43 views

How do I set brightness to a lower level in lubuntu 12 (HP laptop)?

I tried everything I found online, but none of the methods I found worked. The buttons don't work, and there's no such thing as "Brightness" in Monitor Settings. I tried xbacklight -set but it didn't ...
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0answers
78 views

Changes in system screen brightness aren't reflected on actual screen. [Ubuntu 15.10][Laptop]

I've had this issue since 14.04.3 but I never bothered to fix it since I didn't use Ubuntu much. Pressing the brightness up/down function keys brings up the popup displaying the brightness level, ...
2
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1answer
167 views

Incompatibilities between ASUS G771JW and Ubuntu 14.04 LTS

I've just bought an ASUS ROG G771JW laptop. I installed Ubuntu Desktop 14.04 LTS here. I tried installing the driver for the NVIDIA GTX 960M inside it, but after restarting I've got a 640 x 480 ...
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0answers
33 views

Screen dim after booting, need to suspend and resume to fix it

I'm on Ubuntu 15.10 and the screen is very dim on startup (even the manifacturer's splashscreen), and I need to suspend and resume it in orther to fix the issue. This has happened on 15.04 and 14.10 ...
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0answers
22 views

Cannot change screen brightness and f.lux does not work either

There is a problem which I find very annoying. Of course I tried to solve it by googling first but nothing I tried worked so far. I recently moved to Xubuntu and I used to change my brightness ...
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0answers
45 views

Can not get my brightness to change

Happened on Ubuntu before, I could not fix it. Now same issue with Xubuntu. What I've tried: I tried all those sloutions below. Not a single on of them worked. Apps like F.LUX does not work either ...
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0answers
39 views

Unable to change brightness on lock sccreen

When at the lock screen, I am unable to adjust the brightness. This is particularly annoying if the screen is completely off (to save battery) and then locks automatically. You then have a black ...
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2answers
361 views

Asus X554LA fn+brightness problem

I'm new to ubuntu and my Asus X555LA brought me here. The fn + (brightness up/brightness down) is not working, i did some search and what i tried till now is modifying grub file from etc\default ...
0
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1answer
43 views

How to switch the screen illumination off and continue typing? [duplicate]

I can switch the screen illumination manually off by pressing Fn+F6 on my laptop keyboard. This is the same as automatically switching it off on idle as it can be set in the power management. The ...
0
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1answer
756 views

how may i change brightness on asus zenbook ux305

fn+F5 and fn+f6 keys do not change the brightness on my asus zenbook UX05 Thanks to this website I found that command xrandr --output eDP1 --brightness 0.5 reduces brightness to 50% of the rather ...
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0answers
17 views

Prevent OS from setting 0 brightness

I'm using ubuntu 14.04 and on pressing "brightness minus" key, the brightness of the screen does decrease but, if I keel holding/pressing the button,the brightness decreases all the way to zero and ...
0
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1answer
97 views

Ubuntu brightness max_level

Notebook is Lenovo IdeaPad Z500. Ubuntu 14.04 LTS with latest updates. When I first time clicked on F12 (which change brightness up by default) light become lower, but not 0 (I see the text, but it's ...
0
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1answer
85 views

Disable Dynamic Brightness Dell LCD

I have a Dell Inspiron 11 3000 Series laptop that has built in Dynamic Contrast/Brightness in the screen. The screen automatically adjusts it's brightness according to how many white pixels are on the ...
0
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1answer
130 views

is there a command to turn on keyboard lights?

I just updated the BIOS of my friend's Dell Latitude E6420 (from A08 to A22) and found out that the keyboard has a back light! There is a FN+Key which toggles thought the scales of brightness, maybe ...
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0answers
32 views

I no longer have access to the system menu

I was trying to change my brightness and issued a command sudo setpci -s 00:02.0 F4.B=80 Later I installed xbacklight using the following command sudo apt-get install xbacklight Then changing my ...
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0answers
21 views

No brigtness control on Toshiba Satellite running ubuntu 14.04 LTS [duplicate]

running ubuntu 14.04 lts on a toshiba satellite I have no control of bightness. How can I fix this?
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0answers
191 views

Brightness control not working FN keys ubuntu 14.04/15.10

I have a toshiba laptop C855D-124 with an AMD/ATI, and since i installed the graphic card drivers that i can't adjust the brightness.... the FN key works with the other options, just not the ...
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0answers
91 views

How to change screen brightness from commandline on Asus X453?

I'm using the Fluxbox window manager on Ubuntu 12.04. I recently got my desktop into a strange situation, and I'm not sure how! The situation was this: If I close the laptop screen lid and then re-...
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1answer
230 views

Brightness Control : Asus X453MA : Xubuntu 14.04

I cannot adjust the screen brightness using the Fn keys. I have scoured the net to find a solution and so far this is what I have : I've tried creating/editing /usr/share/X11/xorg.conf.d/20-intel....
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0answers
42 views

Problem with backlight

I always have problems with brightness control in my computer,(I have intel graphics HD 400) Until yesterday, I was running ubuntu 15.04 without problem at all. I just have to modify grub with these ...
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0answers
37 views

Windows & GRUB Screen not displaying

I have a Windows-Ubuntu dual boot that worked fine till a few days ago. I upgraded to Windows 10 last month & the dual boot worked fine after that. Suddenly, the GRUB screen & Windows OS (when ...
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0answers
44 views

Screen Brightness not increassing after using "xrandr --output eDP1 1.0

Earlier I was not able to decrease screen brightness from keyboard (It was at its maximum), then I tried: xrandr --output eDP1 --brightness 0.5 Now screen is sufficiently dim now, but now at times ...
0
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0answers
15 views

Macbook brightness using WRONG folder

I am running ubuntu 14.04 with macbook pro mid 2012 Brightness is not working using the function keys. I'm pretty new at Linux, but I know why it is not working, just not how to fix it. #Under /...
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2answers
953 views

I can not increase or decrease the brightness of my screen on UBUNTU 15.10 [duplicate]

just wondering if anybody knows what's the problem. I use the brightness bar control with my keyboard or in options, the computer shows me the brightness bar increasing or decreasing but the screen is ...
2
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1answer
38 views

Ubuntu 14.04 brightness preference option

The lighting preference option seems to allow increased lighting adjustment but after re-setting the screen darkens! When I check the setting it has returned to the previous position. Is there a ...
4
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1answer
100 views

Can I adjust the minimum brightness for my laptop's LCD?

I'm running Ubuntu Gnome 15.04 on my Dell XPS 13 (9333, 2014 model). The LCD brightness can be controlled by the keyboard, and if possible I'd like to adjust the minimum value and/or adjust the ...
0
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0answers
39 views

Brightness is reduced if booted unplugged,but doesnt regain default if plugged in . increasing brightness never makes look default?

when my laptop boots up,if its not plugged in,then the brightness is much less than default.using the command below I increase (>1) but that doesnt look good. command :: xrandr --output LVDS1 --...
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0answers
22 views

Set monitor backlight to minimum level during ubuntu boot

Is it possible to change the default brightness level during boot to the minimum level available.
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1answer
91 views

Ubutnu Screen Flickering after Changing Brightness

I have an Acer Aspire 5742G latop with Ubuntu 12.04.5 LTS. Firstly I had a problem with the brightness (i couldn't change it) but afer I changed GRUB_CMDLINE_LINUX_DEFAULT to ...
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0answers
40 views

Possibility to Limit Processor Utilization by %?

This question refers to the feature in Windows Power Settings that has 2 options: Minimum processor utilization: 0% Maximum processor utilization: 100% Since the default Power Options in Ubuntu ...
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0answers
109 views

Screen brightness resets when restarting Ubuntu

Every time I start Ubuntu 14.04 the screen brightness resets to default. I would like to keep it at the lowest, yet it keeps changing to highest when I restart. This is a problem that have long ...
0
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0answers
45 views

Why Compiz Fusion doesn't work well since Ubuntu 12.04?

Since Ubuntu 12.04 compiz fusion doesn't work well. I don't know why when i active "Cube Reflection Deformation" my screen turns dark. like this: How do I change the brightness in Compiz? and when i ...