A backlight is a form of illumination used in liquid crystal displays (LCDs).

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15 views

Time to dim the screen in Ubuntu 14.04

Ok so it seems that the key in org.gnome.settings-daemon.plugins.power idle-dim-time is gone in the new Ubuntu version. Since the old method Increase screen idle dim timeout doesn't work anymore are ...
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16 views

Suspend not working due to backlight issue

I am using the Radeon HD 6320 video card with the radeon xorg driver. I have tried using the flgrx dirver but it isn't as snappy as the xorg and also has brightness issues. The xorg driver has ...
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0answers
17 views

Turn on ThinkLight?

I have an old Lenovo ThinkPad R61. It is fully loaded and it has the the ThinkLight option. For me to be able to turn it on and do other things like adjust the brightness, I have to use the blue ...
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0answers
55 views

Touchpad/Backlight keys on Asus Transformer T300LA

I have Asus Transformer book T300. Almost all my hardware working perfectly on Ubuntu 13.10/14.04 Beta but my touchpad defined as Mouse and gestures not working :( I need this option. Touchpad ...
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1answer
72 views

How to find backlight is managed by which card?

Is there any command in ubuntu/linux which can help me in finding out that which card(intel or ATI card) is managing my backlight? When I looked at sys/class/backlight then I am able to find three ...
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0answers
60 views

Can't adjust screen brightness on lenova y410p

Can't adjust screen brightness on lenova y410p. I'm running unbutu 13.10. I tried different answers on here but nothing seems to work. I changed GRUB_CMDLINE_LINUX in /etc/default/grub to include ...
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1answer
64 views

How to fix backlight for Dell inspiron on ubuntu 12.0.4 LTS?

I work on a Dell Inspiron laptop. The backlight is not working on Ubuntu. Is there any known issues like this with Ubuntu on Dell machines? I've tried some solutions such as changing grub like the ...
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0answers
34 views

Ubuntu 12.04 boots to blank screen without backlight after upgrade on ASUS A72J [duplicate]

I had a working version of Ubuntu 12.04 in dual boot with Windows 7 on my ASUS A72J. However, after installing the last ~350 upgrades (I had not used Ubuntu in a long time) using the normal updating ...
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1answer
64 views

Keyboard backlight

I have a Samsung Series 7 NP700Z5AH with keyboard backlight. After Ubuntu install it doesnt work, is it possible to fix? There was a "Fucntion" shortcut for the sharpness of the light FN+F9/F10.
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1answer
154 views

Toshiba Satellite P755-S5269 keyboard backlight doesn't work

I'm new to Ubuntu and I have a problem with the keyboard backlight on my laptop. I was looking for solutions on the web but unfortunately I could not find anything specific. My laptop model is ...
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0answers
139 views

Samsung NP900X3G issues on Ubuntu 12.04 ( keyboard backlight, multitouch…)

I recently got the newest member of the Samsung Ativ Book 9 Family NP900X3G and I'm having the same issues that have been reported for the previous models but none of the fixes worked for me. ...
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0answers
34 views

Key Repeat functionality doesn't work on certain keys (Ubuntu 12.04)

I'm running Ubuntu 12.04 on a Macbook Pro and key repeat (when I hold down a key) is not working for any of the brightness buttons (keyboard backlight and screen brightness). Is there any way to ...
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0answers
105 views

How do I adjust screen brightness / backight on a Toshiba Satellite C50D?

I know this is a known bug, it been asked and answered thousands of times before. I've spent the past couple of months searching for a solution and all have failed. My Fn keys won't adjust brightness ...
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1answer
83 views

no display backlight after boot on my notebook

i insttalled ubuntu 13.10 on my COMPAQ PRESARIO CQ-41 209TU notebook.but whenever it comes on login screen, display backlight turns to 0.why?please help me.
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1answer
99 views

How can control my brightness of the display on hp nseries laptop

I just bought a new laptop and i have installed windows 8 and ubuntu 12.04 on it. And while using ubuntu i am not able to control my brightness with the dedicated keys or the softwares such as ...
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0answers
73 views

Which program handles the screen backlight in 13.10?

What is the name of the program that handles the screen backlight in laptops in 13.10? Where are the settings for that program? I need to switch the brightness file that it uses. I have 3 brightness ...
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1answer
39 views

Blender causes my screen backlights to flicker

I am using a desktop with a Radeon HD 5xxx CGU. Every time I work with Blender (no matter the version), my screen flickers at what seems to be random times (meaning I don't feel I am doing anything ...
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2answers
179 views

Toshiba T110 brightness control “FN” doesn't work (Ubuntu 12.04 LTS 32 bit)

I recently installed Ubuntu 12.04 32 bit in my Toshiba T110 laptop, and the brightness control doesn't work. I have tried gedit /etc/default/grub, and have modified the "quite splash" to many ...
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0answers
13 views

Black screen on boot (no backlight) [duplicate]

So after grub .screen my computer screen turns black. i can fix it by increasing brightness with F3-key but is there any way to make it boot with full backlight? My kernel parameters are: quiet ...
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0answers
313 views

Backlight Controls Acer Aspire v5-572G

I know there are already a lot of similar questions regarding issues with no back light control with Acer models. I'm not having that issue anymore I followed the necessary changes needed in ...
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0answers
32 views

Screen flashes back and forth between black and lit screen, not at boot, totally random

Currently using HP/Compaq 6220 laptop with 12.04 lts installed. Sometimes after the system warms up and is running, it will randomly flash the screen to black, back to the screen, back to black, and ...
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0answers
321 views

Turning off keyboard backlight not working in my sony vaio e series

I'm new to Ubuntu. I tried with many solutions i found in askUbuntu to turn off backlight in terminal, but it is asking password.Now the problem arises, even though i am entering the password the ...
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1answer
111 views

How can I force the backlight to never turn off?

I'm using Ubuntu 13.10 with GNOME 3.10 on a Packard Bell EasyNote-TK37 (Intel GM45 Express graphics), and I've had significant problems with my backlight. Initially, upon booting the backlight would ...
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0answers
119 views

Keyboard backlight problem on asus ux32vd

I have running Ubuntu 12.04 with kernel 3.8 I have tried many suggestions, although, the backlight is still not working. If I try to use the most simple solution: echo | sudo tee ...
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2answers
2k views

Enable the keyboard backlights on supported Lenovo (e.g. Carbon X1) with command

Some Lenovo laptops have keyboard backlights, and they can be turned on using Fn + Space. There are three states: off, normal and bright. When I start Ubuntu, these laptops always default back to a ...
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1answer
1k 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 ...
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2answers
665 views

Keyboard backlight function keys for Samsung Series 9 np900x3d and Ubuntu 13.10

I purchased a new Samsung New Series 9 NP900X3D and installed Ubuntu 13.10 tonight. The keyboard illumination function keys do not work. I've read on https://help.ubuntu.com/community/SamsungSeries9 ...
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0answers
393 views

Can't turn off backlight/display - 13.10 / iMac

I can find no way to completely turn off the display on a late 2013 iMac running 13.10 (Saucy). In the power management settings, I configured the display to "turn off" after one minute to see what ...
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1answer
660 views

Start asus laptop UX32VD with keyboard backlight off

I'd like a way to set the default keyboard backlight state to "off". I'm running Ubuntu 13.04 on an Asus Zenbook UX32VD. All the function keys work, but currently I have to turn off the keyboard ...
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0answers
1k views

Keyboard backlight won't work on my Samsung series 9

I got a Samsung Series 9 NP900X3E laptop, running Ubuntu 12.04 When I press Fn + F10, the keyboard backlight won't turn on. In the upper right corner, I can see that it recognizes it (with the ...
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2answers
2k views

13.10 Can't Adjust Dell Laptop Backlight

I have a Dell Studio 1558. When I originally installed 13.04 on it, I had to modify my /etc/default/grub with the following: GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor dell_laptop.backlight=0 ...
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0answers
49 views

Backlight turns on by itself ASUS laptop

Every time I let my computer sit open while I do other things that require my attention I turn my backlight all the way down. For absolutely no reason Ubuntu likes to turn my backlight all the way up ...
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0answers
482 views

No laptop backlight when using AMD driver recommended by Steam

When I install the fglrx-experimental-13 driver that Steam recommends for my laptop (ATI Mobility Radeon HD 5000 Series) I have no backlight when I log in, but an external monitor works. I've tried a ...
3
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2answers
2k views

Screen backlight problem Ubuntu 13.04 Lenovo G700

I have installed Ubuntu 13.04 on Lenovo G700 Laptop. Screen backlight is going off after boot. I have tried to fix it with setting GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" in ...
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0answers
249 views

Brightness minimum level turns backlight off

I have an Acer Aspire S3-391 ultrabook. It's Sandy Bridge i3-2377M CPU with appropriate integrated graphics. 320GB hard drive with 20GB cache SSD. I have Windows installed on the hard drive and Ubuntu ...
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0answers
305 views

FN brightness keys only has 3 steps on laptop with nVidia Optimus

First, I'm a noob at linux. I've tried about everything to fix this but nothing seems to work. My FN keys for the backlight only has 3 steps - either its maximum, medium or minumum. ls ...
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0answers
184 views

How to enable backlit keyboard on a Dell Latitude M4500?

Basically the question in in the title: how can I enable the backlight keyboard on a Dell Latitude M4500?
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0answers
86 views

Turning Backlight on on external Monitor

I have a lenovo laptop running xubuntu smoothly. I plugged in a dvi monitor with a hdmi to dvi wire. The display works perfectly for two seconds then the backlight turns off. I cant find a way to ...
0
votes
1answer
1k views

How can I enable keyboard backlight on sony vaio pro with ubuntu 13.10

How can I enable keyboard backlight on Sony Vaio pro with Ubuntu 13.10? I have already tried setting the bit in /sys/devices/platform/sony-laptop/kbd_backlight with echo 1 | sudo tee ...
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vote
0answers
72 views

VLC does not prevent backlight from turning off on battery

On Kubuntu 12.04 i have noticed that VLC does not prevent my backlight from dimming when watching a movie in fullscreen on battery. I have the following enabled in the advanced preferences: Inhibit ...
0
votes
1answer
190 views

Backlight controls stop working once X starts

I'm using a Lenovo Thinkpad X120e with Ubuntu 12.04 LTS 64-bit and a Gnome 3.4 (gnome-shell) desktop environment. I have installed the latest proprietary AMD drivers (From their website) for the AMD ...
0
votes
1answer
429 views

Disable keyboard backlight on Sony Vaio S series (2012) (Ubuntu 13.04)

Basically I'd like to disable the keyboard backlight which at the moment is always on, on my Sony Vaio S15 (2012 series). I've read a few responses in the past which want me to look for the ...
0
votes
1answer
478 views

How to hotkey the brightness settings

I want to hotkey certain often used brightness settings under ctrl+ F7 through F10. I can already change it with the therminal. To be able to do this I ran the following command chmod 666 ...
0
votes
1answer
599 views

How to turn off keyboard backlight of and Alienware M14X laptop

OK, I have an Alienware M14X and the keyboard backlight is always on and i can't turn it off... Google didn't help me much. I want to turn it off because it's disturbing sometimes p.s. i uninstalled ...
0
votes
1answer
739 views

Backlight adjustment not working in Lenovo IdeaPad Y580

I installed Ubuntu 13.04 on my Y580, and I added the acpi_backlight=vendor option to the bootloader. The OS boots without the black screen now, but I can't adjust the brightness with Fn+Up/Down keys. ...
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votes
1answer
105 views

writing a script, making it executable then assigning it keys

I have a Samsung np700z5a and have managed to get most features working but would love to get the keyboard backlight keys working. I have tried several methods including through the terminal. I have ...
0
votes
0answers
413 views

Unable to adjust backlight on Asus UL30vt neither with fn keys nor with xbacklight -set

I recently installed ubuntu 13.04 (kernel 3.8.0.y) on an older Asus UL30vt laptop. This is a switchable graphics (optimus) laptop with a intel onboard graphics card and an Nvidia Geforce G210M. I am ...
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1answer
297 views

How can I avoid maximum brightness settings upon every boot?

Whenever I boot Ubuntu the display and keyboard brightness are reset to maximum. Since I almost never need such high brightness settings, every boot includes an aftermath of excessive key pressing. ...
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votes
0answers
89 views

display-backlight doesnt lights up when i start my hp g62

Hey there :) when I start my hp G62 the display brightness is off and I have to take a lamp or a flashlight to see something on the screen and then I manually turn on the brightness of the display. ...
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0answers
162 views

How do I turn off the display (DPMS) without X?

I've been trying to switch off the built-in screen of a device I've got, but I can't seem to completely control it without X running. If I run a GUI (I've tried Kubuntu 12.10) and issue the command ...