Questions related to screen brightness.

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0answers
11 views

Can't control brightness in Ubuntu

I have an old desktop with an Acer CPU having Intel graphics card running Ubuntu 14.04 . I can't find a way to adjust the display brightness. I have gone through many threads here and googled many ...
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2answers
783 views

How can 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 ...
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0answers
8 views

Ubuntu screen goes black after brightness is turned down

So my brightness hot keys work great on Ubuntu 16.04, but only when I go between 100% down to 83%. Once I hit 82% my entire screen goes black. If i turn the brightness back up it works fine, but I ...
2
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0answers
17 views

Function keys change wrong backlight file on my Acer Aspire One

Whenever I press the function keys to change my laptop's screen brightness, it modifies the value stored in the file /sys/class/backlight/acer-wmi/brightness, but my screen stays the same. With a bit ...
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0answers
7 views

Display brightness is not working “REAL TIME” on my Acer laptop

I am on an Acer (Aspire 5740) laptop and running Ubuntu 16.04LTS 64bit alongside Windows 10. I noticed that brightness control does not work real time when I try it in settings or with Fn+brightness ...
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0answers
39 views

I can't change the brightness on Ubuntu 16.04

I was able to change brightness manually before but unfortunetly this solution doesn't works for me anymore. Here is the solution that used to work for my computer : Now I can still change the ...
0
votes
1answer
27 views

Ubuntu 14.04 brightness issue

I have a Samsung laptop although I don't think this is relevant to the issue. If I boot my laptop on AC power, all brightness functions work properly even if I subsequently remove it from the power. ...
0
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0answers
22 views

Screen Brightness not binded to Multimedia keys properly

After I installed Ubuntu 16.04, I found that the brightness of display was set to brightest possible and I wasn't able to change it. Then I installed Brightness Controller and it worked. Then from ...
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votes
1answer
55 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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0answers
16 views

How to change intel backlight to acpi_video?

In my ubuntu I can't change my brightness through nor through system setting. I found that brightness is controlled by intel card rather than acpi. Meaning in folder /sys/class/backlight I have two ...
0
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0answers
18 views

xbacklight - No outputs have backlight property

I am running Lubuntu 16.04 Attempting to run xbacklight -get gives me No outputs have backlight property There is only one directory in /sys/class/backlight, which is intel_backlight. I have ...
5
votes
8answers
53k 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 out....
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4answers
6k views

Use webcam to sense lighting condition and adjust screen brightness

Is there a way to have my webcam sense lighting conditions and adjust screen brightness accordingly?
5
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3answers
105 views

Update brightness level depending on the power source on 16.04 LTS

I recently migrated to 64 Bit 16.04 LTS from 32 Bit 14.04 LTS on my Toshiba L645 laptop. In 14.04 LTS system, I had a script that automatically updated the brightness level depending on the power ...
1
vote
2answers
150 views

How to Disable Ubuntu Phone “auto dim” function?

Is there a way to disable the auto dim function of the Ubuntu Phone (14.10 r22)? Even though I can disable the auto-brightness function and set the screen timeout to 10 minutes (or never) the screen ...
1
vote
1answer
129 views

Automatically reduce brightness on battery in Ubuntu 15.10?

How can I automatically reduce brightness when I unplug the AC in Ubuntu 15.10? I tried modifying dconf-editor settings as suggested here, http://askubuntu.com/a/312619/511925, but there are no ...
0
votes
2answers
182 views

Backlight won't turn on after suspend on Macbook air (Early 2015)

After suspending my macbook by closing the lid the backlight will not turn back on however the rest of Ubuntu resumes normally. The screen brightness setting also has no effect on the screen ...
0
votes
1answer
79 views

No control over screen brightness on Ubuntu-Mate 16.04

I'm running Ubuntu MATE on a samsung N210 netbook, which is rather old. I had it running Ubuntu 14.04, till yesterday, and the screen brightness control worked fine since day one. After installing ...
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vote
2answers
6k 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 ...
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votes
3answers
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 ...
3
votes
2answers
135 views

How to Control Backlight and Set Max Limit Brightness in Display of Ubuntu 16.04?

My Macbook Air 2013 power lasts 1.5 hours with just too bright light. More than 7 hours with normal light (that is 30-40% of the current max) corresponding to my default brightness in OS X where the ...
0
votes
0answers
27 views

Change minimum brightness level on Meizu Pro 5 Ubuntu Edition

Meizu PRO 5 screen flicker in low brightness mode. This is not hardware defect, but my eyes isn't happy with this problem. I want set minimum auto-brightness level at 30% I found this bugreport https:...
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vote
2answers
4k 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
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2answers
7k views

How to adjust brightness on Lubuntu?

I can't adjust my screen brightness. Indeed, I can't find this option in my system parameters. I am using Lubuntu 12.04. Thank you for your time :)
0
votes
1answer
29 views

How to fix auto-dim?

It seems like many people have asked how to disable the auto-dim feature (System Settings -> Brightness & Lock -> Dim screen to save power). But I am having the opposite problem. I want this to ...
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0answers
37 views

thinkpad_acpi disabling brightness events

After installing routine updates, my keyboard brightness controls, wireless on/off, and other controls have stopped working. Interestingly, the 'lock' key still works. I have looked at a few other ...
2
votes
1answer
5k 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 ...
5
votes
2answers
9k 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: ...
0
votes
2answers
108 views

Brightness Does not work at all Samsung ultra book intel backlight

I have a problem with my 530U4E/540U4E Samsung Ultrabook Backlight settings; the system doesn't seem detect the change in brightness settings. To fix it I tried the "Intel backlight Fix" because my ...
1
vote
1answer
116 views

XModMap Key Remapping Not Totally Working

I have a Mac Keyboard I am using with new version of Ubuntu. Whenever in a web browser, I try and hit the F5 key to naturally refresh the page but in Ubuntu this key seems to be mapped to Keyboard ...
0
votes
2answers
55 views

Screen brightness problem on asus u82u with radeon HD6320

I just upgraded my laptop to the newest ubuntu version 16.04 LTS and noticed that I can't change screen brightness. I have tried all methods with GRUB which I find in google, but still can't fix this ...
0
votes
1answer
181 views

Adjust Brightness 16.04

I've just upgraded to 16.04, and tried to download brightness controller from Ubuntu Software, but I can't find it. I need to reduce the brightness for my eyes' health. Thanks. I'm using a desktop pc ...
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vote
1answer
14k 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 ...
1
vote
1answer
530 views

Brightness key not working Ubuntu 16.04 LTS

I've just installed Ubuntu 16.04 on my Lenovo Z400 notebook and everything was working. Today I tried to change the brightness of the screen and it gets dark and I can't go back. Can anyone help me? ...
0
votes
1answer
4k views

Disable automatic screen dimming

I currently have three computers running Ubuntu. With two of them, If I don't touch the mouse or keyboard... nothing happens. However, with the third, the screen gets dimmer after about 60 seconds of ...
3
votes
1answer
3k views

How to stop automatic brightness change while on battery?

I generally keep screen brightness lowest.While laptop is on battery if I do not use mouse or keyboard for some time (I do not exactly know this time interval, maybe 20 second) brightness increases ...
5
votes
1answer
177 views

Enable [Fn]+[cursor arrows] on lock/login screen to change volume and brightness

Having a new Acer Aspire E17 E5-773G with Ubuntu 16.04 on it, I experience that the keyboard combinations to adjust volume (Fn + ↑/↓) and brightness (Fn + ←/→) do not work on the login screen or lock ...
-1
votes
1answer
65 views

Dim screen light even though I have brightness on high

So I currently am using Ubuntu 16.04 LTS and the brightness button registers my screen brightness on high, however, the actual brightness that I see is the lowest. I've tried using terminal codes to ...
8
votes
4answers
14k views

14.04 Asus g56jr Fn + Brightness control

I have recently installed Ubuntu on my new Asus G56Jr laptop. I noticed that despite all the other Fn+fX keys are working, the screen brightness does not. I have already tried editing the grub, as ...
0
votes
0answers
21 views

How can I temporarily disable my screen lock settings during video playback?

I use my laptop to watch movies (crazy, I know), sometimes in a browser (Firefox) and sometimes in Totem. Either way, while I'm watching, the screen dims and eventually locks, per my Brightness and ...
5
votes
3answers
3k views

Can't change brightness in Ubuntu 16.04 LTS

I'm new to linux systems in general (I'm using Ubuntu 16.04 LTS) and I'm having difficulty in changing the brightness of my notebook. When I use the Fn+F8 or Fn+F9 the brightness bar shows up but ...
0
votes
0answers
59 views

How do i disable Automatic Brightness in Ubuntu-Gnome [16.04/15.10]

Before someone points me to this I would like to point out that I want to completely disable the auto-brightness change feature as it doesn't work at all for me and neither am I interested in any auto-...
24
votes
6answers
16k views

Is there a software utility to adjust screen gamma/brightness/contrast?

I use to work at night and it is eye-hurting to watch at lightbulb-bright screens (I've got two - laptop's built-in panel and an external 18-inch CRT) in a dark environment. So I adjust my screens to ...
0
votes
0answers
65 views

Nvidia backlight/login screen/external display issue

I`m combining this three issues becauese they are probably connected with each other. 1. Backlight is not natively supported. In order to set backlight using function key on keyboard I have to add ...
0
votes
0answers
37 views

Lubuntu 16.04 reduces backlight brightness to minimum on high load/temperature

The question is how can I disable this behaviour? It is maybe a kernel related thing but I could not find any option to disable it. If I put the brightness back to maximum, after some time the ...
0
votes
1answer
95 views

App to adjust gamma in ubuntu 16.04

Is there an app that can adjust gamma/brightness/contrast for ubuntu 16.04? xgamma doesn't have any effect. Thank you Edits *-display:0 description: VGA compatible controller ...
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0answers
57 views

Adjusting brightness to my laptop

I try through System Settings to change the brightness of my screen, but nothing happens. I also tried to follow this answer how to adjust screen brightness in ubuntu 14.04?. But I think that the ...
0
votes
0answers
24 views

Guide to using trayer?

I am trying to use trayer through command line and I don't understand how to add items onto the actual tray. I am trying to add brightness indicator next to the wifi symbol so i can easily adjust my ...
2
votes
1answer
4k views

Brightness setting not working on Xubuntu 15.04 ( vivid vervet)

I recently upgraded from xubuntu 14.04 to 14.10 and then to 15.04 on Lenovo z580. I used to control brightness on 14.04 using xbacklight from command line. Now its not working. 15.04 also has a ...
0
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0answers
39 views

gsd-backlight-helper spamming the log after upgrade to 16.04?

Since updating to 16.04 from 14.04, I have the syslog spammed by: SEC: May 22 13:26:43 samsung-romano pkexec[21248]: gdm: Error executing command as another user: Not authorized [USER=root] [TTY=...