Questions related to screen brightness.

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0
votes
1answer
364 views

Why can't I reduce the screen luminosity on Toshiba L775?

I've installed Ubuntu on my Toshiba Satellite L775 but the biggest problem is that I can't reduce the screen luminosity, It's too too bright and I almost can't use it at night.
1
vote
0answers
115 views

Keyboard shortcut script not working

I finally gave up on getting my Fn+up/down keys to change my screen brightness on my laptop. I took a brightnessup.sh and brightnessdown.sh script and put them in /etc/acpi and then went to keyboard ...
48
votes
11answers
39k views

Desktop doesn't remember brightness settings after a reboot

Every time I reboot my machine the brightness goes back to 100% in Gnome. I wish it would keep the last setting. Is there anyway?
13
votes
12answers
59k views

How to control Brightness

I didn't install anything myself, but only Ubuntu 12.04 LTS on an Acer 4741g. I use Fn+left/right to change the brightness, but failed. How can I control the brightness levels?
22
votes
5answers
31k views

How do I set default display brightness?

Is it possible to set the default display brightness so you don't have to re-adjust it everytime you reboot? My laptop display is killing my eyes at the login screen already because it starts at 100% ...
0
votes
2answers
112 views

Brightness Icon

Before Icon Brightness was appearing Hotkey (FN+Arrow Right) Whenever i wanted to change my brightness the icon appears on right side of Ubuntu. But then it suddenly stopped working, it was changing ...
0
votes
0answers
149 views

How can I get more granular brightness control on Asus X550C laptop

I am quite of a newbie to linux and I like my screen to be as dim as possible most of the time. I have Asus X550C Laptop and I had installed Fedora "heisenbug" on it. The thing was, brightness ...
1
vote
3answers
1k views

How can I stop my Dell Inspiron laptop from dimming the screen when I plug in the AC adapter?

I'm using a Dell Inspiron N5110 laptop with Ubuntu 13 and I find that every time I plug the power in to charge, the screen brightness dims. If I go into the brightness settings window the brightness ...
0
votes
1answer
804 views

brightness control not working in 14.04 (dell inspiron 3537)

brightness control not working when keys are pressed with Fn key. it shows indicator on top right corner increasing & decreasing but nothing happens.
0
votes
1answer
52 views

Ubuntu 12.04 brightness control not working on HP 255

The brightness of my HP 255 is stuck on its brightest level and won't turn down even when I move the cursor back and forward. I tried some of the answers to this on my computer, and now the whole ...
0
votes
2answers
109 views

Changing screen Brightness with a script

As you may know, screen brightness drains battery, that's why it is considered a big problem for laptops (at least for me). I can change the screen brightness but every time ubuntu boots up I will ...
0
votes
1answer
144 views

I am unable to change brightness of my laptop

i am new to ubuntu and using Ubuntu 14.04 and installed nvidia graphics driver in my sony vaio E-series VpCEH25en but I cant change the brightness.
0
votes
2answers
109 views

Something weird is happening with Fn keys

I have an Asus N56JR with NVIDIA GeForce 760M. I am running Ubuntu 14.04 LTS. There are a few things wrong with my Fn keys. For one the brightness (controlled with Fn+F5 and Fn+F6) do not respond at ...
9
votes
2answers
731 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
273 views

Carbon X1 and Ubuntu 14.10 issues - hibernation, key mapping, brightness and volume keys

I got a Thinkpad Carbon X1 (2nd Gen) with Ubuntu 14.10 and I have a few issues/questions: 1. hibernation (Edit - ...
0
votes
1answer
1k views

Automatic screen brightness on Ubuntu 14.10 not working right, manual controls not working at all

My Samsung NP740 has been running Ubuntu fine for 18 months. I did an upgrade to 14.10 and the screen brightness controls stopped working correctly. I did a wipe and fresh install and I still have the ...
3
votes
2answers
2k views

Hot keys brigtness issues with Ubuntu 14.10 in Acer Aspire 5755

I have a Acer Aspire 5755 with Intel video graphic, on Ubuntu 14.04, the combination Fn+←/→(Right/left) arrows can increase/decrease the brightness screen. Works fine on unity and with a ...
2
votes
2answers
4k views

I`ve got some problems with new Acer Aspire S3

I just got a new Acer Aspire S3 Laptop, and I've installed Ubuntu on it. Here is some problems: 1. Bluetooth (AR3012) can't find any devices. rfkill shows that everything is fine, but I still can't ...
2
votes
0answers
165 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 ...
1
vote
1answer
228 views

Some Fn Keys not working after BIOS upgrade (ASUS X401U)

Before upgrading BIOS from version 204, all Fn Keys were working properly. After successful upgrade via EasyFlash to version 313 of my ASUS X401U some Fn keys are not working anymore which are: Fn + ...
0
votes
1answer
209 views

Changing the brightness on the Lenovo T410

I can't change the brightness on my lenovo T410 laptop. I tried changing it from the system settings and using fn+Home, but both didn't work.
0
votes
0answers
111 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
275 views

Brightness keys not working and no obvious interface for adjustment either

New to Ubuntu and so far pretty happy with it but one niggle is the brightness controls do not seem to work. I have looked at fixes on here + google but nothing seems to get it right. Mostly effecting ...
0
votes
2answers
855 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 ...
5
votes
2answers
2k 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
0answers
118 views

How do I change the default brightness on my computer?

Every time I turn on my computer the brightness is automatically set to the highest possible setting. Is there a way I can change this and make the default brightness setting darker?
0
votes
1answer
3k views

Xubuntu 13.10 Screen Brightness Fn Keys

I have a Samsung Series 9 NP900X3C, which has a Intel HD Graphics 4000 chip. When I use the the Fn keys for changing the brightness, it shows me a nice OSD and sets the value in ...
1
vote
2answers
394 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
2answers
653 views

No brightness control in Ubuntu 12.04, Lenovo V570 [duplicate]

I have been struggling now for an inordinate amount of time trying to get the brightness adjustment working in Ubuntu. I am running Ubuntu 12.04 on a Lenovo V570 Laptop. I have tried all of the ...
5
votes
0answers
2k views

Can't control laptop screen brightness after upgrading to 14.10 [closed]

My brightness is stuck at 100% when I have the power cord plugged in, and using the hot keys to change the brightness, or changing the brightness through the system brightness app does nothing until I ...
0
votes
0answers
62 views

lenevo g580 touchpad sometimes stop responding Ubuntu 14.04 64bit

My laptop touchpad won't work and only external mouse is working any way to install drivers or something that can resolve this issue ? Somebody would like to give auto script or something to make it ...
1
vote
1answer
811 views

Brightness and actual backlight mismatch after reboot

This is not a duplicate of this or that! The problem in detail The brightness hotkeys works well in increasing or decreasing the brightness, but if the brightness is less than 100%, after a reboot ...
1
vote
1answer
876 views

Fn keys for brightness not working on Asus X551MAV­-SX366GB

Brightness should be controlled by pressing Fn + F5 and Fn + F6. Nothing happens when I press these keys. My computer is a Asus X551MAV­-SX366GB and I'm using Lubuntu 14.04
0
votes
0answers
58 views

FNKey Brightness - Change Behaviour

When I change my screen brightness using FN keys in Unity or other DEs, the brightness changes instantly. It is very sudden. But when I use xbrightness -dec 10 the change is more soften. Is there any ...
2
votes
2answers
859 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 ...
0
votes
1answer
103 views

Unable to change brightness using after root access

Case-1 Recently I read a question(Brightness is reset to Maximum on every Restart). Then I opened up my terminal and typed out following command- sudo echo 200 > ...
0
votes
0answers
32 views

Intel video setting always max nvidia

Every time I restart my computer brightness goes to max. Does anybody have idea how to brightness be the same as I left it before shutting down.
0
votes
1answer
187 views

Slow Performance…Hard drive Problem?

I had my laptop run out of battery twice in the last two weeks. I went to go start it right after plugging it back in, and it hung on the "Ubuntu" screen with the little dots. I started it in the ...
1
vote
1answer
367 views

Any way to enable dynamic/automatic brightness adjustment?

My Lenovo ThinkPad X201 Tablet has a very bright screen (400 nits!), which is good for when objects on the screen are dark (say a night scene in a movie), but it is of course very blinding when ...
1
vote
2answers
89 views

How to reduce LCD brightness if intel_brightness is unistalled?

tried echo,xrandr and even xbacklight couldn't reduce backlight of my screen. Can anyone suggest any other way?
0
votes
0answers
300 views

acpi_backlight=vendor not working

I installed Ubuntu 14.04.1 and the screen just isn't bright enough. I've read on the forums that adding acpi_backlight=vendor to the grub will make your screen brighter. After updating the grub and ...
1
vote
1answer
269 views

Brightness is reset to maximum after waking up from suspend or lock screen

This question is somewhat related to this question: Brightness is reset to Maximum on every Restart Basically, I modified /etc/rc.local to set the brightness, as detailed in this answer, so on ...
0
votes
2answers
446 views

Asus N56JR laptop, can't change screen Brightness using Function Keys

I have an Asus N56JR laptop with Nvidia GeForce GTX 760M graphics card, running Ubuntu 14.04 LTS. When I check what graphics I use for brightness it says "Intel". I have tried using commands to ...
0
votes
0answers
84 views

Brigthness Display and Power Management

Please help. I'm using Ubuntu Gnome 14.04LTS, I need to tweak my Brightness Display to consume long battery life. I want to have 50% Brightness Display when I'm Unplug and 100% Brightness Display when ...
0
votes
0answers
63 views

Brightness and Power management

I'm using Ubuntu Gnome 14.04LTS. I want to tweak my Brightness setting to consume long battery life.I want to have 100% brightness when Im on Plug and 50% brightness when Unplug However when I go to ...
2
votes
2answers
6k views

How do i make screen dimming work in ubuntu 12.04 (beta 2)

I recently installed Ubuntu 12.04 (beta 2) on my HP mini 110-4117, but I cant control screen brightness. The Fn + F2 , Fn + F3 keys don't work. System Settings > Brightness and Lock doesn't provide ...
4
votes
8answers
42k 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
2answers
127 views

Brightness Problem

Hello there Linux user I am a new user and I don't know how to turn down my brightness of my laptop when I change it with the keys it show on the screen going down but the screen is not dimming I ...
0
votes
0answers
102 views

Acer Aspire 4820t brightness fn-keys skip steps

My acer adjusts brightness 3 steps at a time. I've used solutions from: Why does my Thinkpad brightness control skip steps? I've disabled the video driver from adjusting brightness: sudo sh -c 'echo ...
0
votes
2answers
122 views

How to write a script which automatically presses `Fn + F3` button on my keyboard

I am struggling with screen brightness reset issues . It resets to 100% on every reboot. I have tried searching for solutions but none of them worked[including xbacklight ]. Since I can change ...