Questions tagged [backlight]

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

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HP Elitebook 745 G5, AMD Ryzen 3, Xubuntu, no brightness control

I have trouble with my HP EliteBook laptop with AMD graphic card. I am using Xubuntu 18.04. Control of brightness is not working, I dont have option for adjustment of brightness in Settings of Power ...
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Display backlight won't turn on after suspended state (Hp omen 15)

When ever my laptop is coming out of a suspended state the back light will not turn on and I have to reboot the entire machine to fix it. I've tried many things including installing a fresh version of ...
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No brightness control and /sys/class/backlight empty in Ubuntu 18.04

No brightness control available in Ubuntu. I tried various kernel boot paramters and none worked. I tried adding /usr/share/X11/xorg.conf.d/20-intel file with intel_backlight - did not work. I have no ...
Confguy2016's user avatar
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Brightness changes are shown by the indicator but have no effect on the display (Lubuntu, Intel card)

I have tried many of the proposed solutions that I could find on the web, but any of them worked for me. I detail here my problem and some of the things that I tried: Relevant details: TOSHIBA NB200 ...
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Keyboard backlight not working - Sony SVT15115CXS (18.04.1 LTS)

I have tried many things to get the keyboard backlight working on my laptop, to no avail. lsmod shows the sony-laptop module. When I get modinfo for sony-laptop, I see parameters kbd_backlight & ...
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How to make keyboard backlight controls work in ASUS FX503VM?

Hello Ubuntu community. I've recently purchased the ASUS FX503VM laptop and I've managed to solve most of the "problems" so far in Ubuntu 18.04. The one that is bugging me for a week now is the ...
Subtilis's user avatar
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Ubuntu 18.04 slows down when adjusting backlight using keyboard hot keys

I have a Dell inspiron 14, and when I use the keyboard hotkeys Fn + F12 or Fn + F11 to adjust the screen brightness, the system slows down and the brightness is adjusted slowly. Sometimes it keeps ...
Almir M. da Cunha's user avatar
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Turn Keyboard backlight on ASUS Predator

Hi I've just made the switch to Ubuntu on an Asus Predator. And loving it so far. However, I'm a command line n00b and I've been trying to get my keyboard backlight to turn on with no success. Could ...
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Switching backlight brightness to zero by pressing fn-key

I have Ubuntu 16.04LTS running on my Dell XPS 15 9550. Until yesterday the fn-key for setting the brightness was able to set the brightness level to 0 (shutting backlight off completely) which I ...
Ben Hogan's user avatar
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acpi and function keys

Good day to all, No matter what I try, I just can't seem to get all of my function keys working. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" With the aforementioned setting, all function keys except ...
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Adjust backlight level according to environment

In the Ubuntu world,is there a tool that can adjust backlight level according to environmental light levels with the help of a front camera?
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Laptop brightness resets on opening lid?

So I just installed Ubuntu 16.04 on my laptop(fresh install) and am having an issue I did not have in Ubuntu 15.10. So I have set the When the lid is closed to Do Nothing as I don't want my laptop to ...
mayank budhwani's user avatar
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Brightness Problem Ubuntu 15.10 (Dell inspiron 5737) [duplicate]

i need help how to fix my laptop Dell Inspiron 5737 brightness being stuck at max, when i press keys on my laptop scale shows that it "works" but brightness remain the same at max and it is ...
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Display still reset to minimum after restarting in ubuntu 14.04

I already follow these instructions provided in Ubuntu StackExchange and display is still reset to minimum after restarting. 1- cat /sys/class/backlight/acpi_videoX/brightness gksu gedit /etc/init/...
KryptoMac's user avatar
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Brightness Ubuntu vs. Kubuntu and Xubuntu

On Kubuntu and Xubuntu the brightness of my monitor goes down to zero (i.e. the backlight got switched off). On Ubuntu this does not happen, the minimux brightness is still with backlight on and ...
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Brightness slider is too fine (14.04)

I'm running ubuntu 14.04 on a Dell laptop (XPS 13 Developer Edition). The brightness slider stopped working (the slider would fill up and empty as usual but the brightness wouldn't change). This fix ...
Chris L. Barnes's user avatar
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*ERROR* Cannot find a backlight controller

So I just updated my kernel version on Ubuntu 15.04 64bit to Kernel 4.1.6 latest mainline. Now every boot of my laptop, I got this error. starting version 219 _ ...screen blink... starting version ...
RoldanLT's user avatar
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2 answers
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sudo is denied access to change keyboard backlight?

Opening vim as sudo -i or sudo - still doesn't let me write to the file. Trying to change the keyboard backlight settings on my laptop gives me this output; even with sudo I can't change anything in ...
Fetts Vett's user avatar
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3 answers
2k views

Ubuntu 14.04LTS hangs when i change brightness of my display on Dell N5010 laptop

I have dell n5010 my system hang when I try to change brightness of the display and this happen only when my system on battery please help how to solve this problem
Mehul Katara's user avatar
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Backlight button not working ( Dell inspiron 14z) - 14.04

The main point is that everything was working on 12.04 but now I can only change brightness using the applet. Here's what I have done so far: Following the info provided on Ubuntu Wiki Backlight I ...
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Screen brightness stuck on max setting, FN+down only brings it down one level

EDIT: Updating to Ubuntu 13.10 solved this issue for me out of the box. I'm trying to get some control over the brightness of my Samsung QX411 (Integrated Intel graphics) on Ubuntu 3.04 (though I ...
Adam's user avatar
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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 > /sys/class/backlight/acpi_video0/...
Andrew's user avatar
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Modifying brightness control shortcut key bindings

I have a Toshiba Satellite R830 laptop with Ubuntu 13.04.1 64 bit. The Fn + F6 and Fn + F7 buttons adjust brightness until I put my laptop on sleep. On wakeup they don't work any longer. On Ubuntu ...
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I can't dim my laptop's light

I can't modify my laptop brightness. Is it a BIOS problem? It works in win 7, but doesn't work in Ubuntu. It's an Acer Aspire 5750-6842 laptop with Intel HD graphics 3000 video chipset.
Emanuel's user avatar
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How to make backlight work on Acer 5732z?

I want to run 12.04 on my Acer Aspire 5732z. I know from research that these computers have issues with the backlight on Ubuntu. So I tried a couple of solutions: The sudo lightdm restart method. I ...
Dude Random21's user avatar
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2 answers
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Editing pommed.conf doesn't seem to have an effect

I am on a Macbook Pro 5,5 running 12.04 LTS, pommed v1.39, and Gnome Shell 3.4. On Macs you should install the pommed package to make full use of the media keys on mac keyboards: brightness for ...
Trey's user avatar
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How to tell gnome which file to use to change backlight brightness? [closed]

I have a Dell Inspiron M5010 and I am unable to change my backlight brightness with the F-Keys and it also does not work with gnome brightness widget. I am able to change backlight brightness ...
cebe's user avatar
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1 answer
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Antec Fusion Black LCD won't turn off on system shutdown

I've been struggling a while with getting the iMON LCD/IR-receiver on my Antec Fusion Black case to shutdown together with the system (XBMC Live 10 - ubuntu based). But it won't. When it's turned off ...
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Brightness Hotkeys Only Slightly Work

I just installed Precise on my Samsung Laptop (QX412-S01au, using Ubuntu 2D). The brightness hotkeys sort of work: Adjusting the brightness using the slider in the control panel works just fine ...
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1 answer
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samsung backlight

I have a Samsung Series 7 Chronos (700Z5C-S02UB) and a couple of kernel updates ago (I'm currently on 3.5.0-25-generic ), I lost the keyboard backlight support. Any idea on how to turn it back on? ...
GClaramunt's user avatar
1 vote
1 answer
2k 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 ...
EnTHuSiAsTx94's user avatar
1 vote
1 answer
9k views

Keyboard light hotkey (Fn + F3 and F4) rarely work on an Asus G60J

Im using Ubuntu 12.04, and my laptop is an Asus G60J. Specifications: Ubuntu 12.04 64bit Intel i7 720qm Nvidia gtx 260m 4gb RAM The laptop always start with the keyboard backlit On. The hotkeys ...
NewK's user avatar
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1 answer
645 views

Dell Latitude E6400 keyboard backlight does not work with Ubuntu 18.04

After the fresh installation of Ubuntu 18.04 at Dell Latitude E6400 laptop its keyboard backlight worked. Nevertheless, after some updates (I do not know when) the keyboard backlight has stopped ...
Elep331's user avatar
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2 answers
634 views

Ubuntu 18.04 brightness/backlight command

In Ubuntu 18.04 with GNOME, what is the command that is used to change the display brightness (backlight)?
BeastOfCaerbannog's user avatar
1 vote
3 answers
2k views

Built in dell keyboard backlights not working

I have a Dell Inspirion e4310, and it came with windows 7, and the keyboard backlight worked. But I put Ubuntu on it instead, and now the back lights don't work at all. I have tried using the sudo ...
Austen Clay's user avatar
1 vote
1 answer
2k views

Can too low brightness damage my screen?

I can modify /sys/class/backlight/acpi_video0/brightness to set brightness of the screen. Previously I had Windows installed, and the lowest brightness went down to some certain point, however, on ...
OverCoder's user avatar
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2 answers
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Unable to change brightness in settings

NOT A POSSIBLE DUPLICATE: My question is not the same as Can't change brightness in Ubuntu 16.04 LTS because I have tried most of the solutions there and they didn't work. Whenever I try to ...
nom's user avatar
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2 answers
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How to make my Toshiba u940 laptop's keyboard backlit to work?

I am using the latest Xubuntu x64 version as of this posting.. It's installed in dual boot with Windows 10.. the KB Backlight is working when I boot on Windows and from the bios.. The moment It enters ...
im.earl's user avatar
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1 vote
1 answer
640 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 ...
Evan Pak's user avatar
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3 answers
3k views

Acer Aspire Backlight Problem

I have the same problem as found on this link Screen turns black after booting, backlight only works in recovery mode on an Acer Aspire 5736z I've never used any Linux before so if someone could ...
Kyle Maclean's user avatar
1 vote
4 answers
5k views

HP Pavilion g6 laptop backlight turns off at login screen

I've seen posts like these but they all seem to mention the inability to get the brightness back up. I can turn the brightness back up with my keyboard, but it's an annoyance that I'd like to get rid ...
hardisty's user avatar
1 vote
2 answers
5k views

How do I enable the backlit keyboard on an ASUS G53SX or G53SW?

Does anyone know how to enable backlit keyboard on ASUS G53SX? Edit as of Feb 18, 2012: As Qw4z1 mentioned here's a trick to enable the backlit brightness: su (enter root password) echo 0x00050021 &...
Blue Pony Inc.'s user avatar
1 vote
1 answer
1k views

Lost macbook pro LCD backlight brightness controls after installing nvidia driver

I installed Ubuntu 20.04 LTS with the 5.11.0-34-generic kernel on my mid-2009 macbook pro which has nvidia geforce 9400M graphics hardware. Suspend and wake from suspend does not work with the nouveau ...
caparks's user avatar
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1 vote
2 answers
3k views

Enabling keyboard backlight on Sony VAIO on Ubuntu 19.10

After reading dozens of other posts and nothing seems to work, I've located "keyboard backlight" in the /sys/module/sony_laptop/parameters/ module but don't know how to get it to switch on. I've ...
Alan's user avatar
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1 vote
1 answer
934 views

Backlight broken after upgrading to Ubuntu 18.04

Yesterday, I upgraded from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS. Now it seems the backlight is no longer adjustable. There is no change in the screen brightness when using either my Laptop's hotkeys ...
o0BlueBeast0o's user avatar
1 vote
2 answers
5k views

Keyboard backlight on Xiaomi Notebook keeps turning off

Ubuntu 18.04 is installed on my Xiaomi Notebook 13". I am having an issue with the keyboard backlight : after a few seconds without using the keyboard, the backlight of the keyboard turns off until ...
rbarbazz's user avatar
1 vote
2 answers
2k views

Adjusting the display backlight on HP ZBook 17 G4 with Nvidia Graphics

Posting this because I've been googling frantically attempting to save my poor, poor eyes without much success. And I've not found anyone posting specifically about this specific laptop, so new post. ...
ohshazbot's user avatar
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1 vote
1 answer
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Ubuntu in VMware 11 and Cooler Master LED keyboard

I just want to try Ubuntu Linux. Basically Linux for learning purpose. And that's the reason I have installed Ubuntu 14.04 LTS (Trusty Tahr) x86 on my VMware 11. The problem is this: I am using ...
Jeet Chowdhury's user avatar
1 vote
1 answer
151 views

Where is the laptop brightness script located?

Online I found the command: echo 1 > /sys/class/backlight/acpi_video0/brightness to set my screen brightness to the lowest possible value, currently I am grepping my entire disk for that path, ...
nmz787's user avatar
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1 vote
1 answer
737 views

Make a script run at startup

First of all,sorry for my bad English. Im using Xubuntu 12.04 on Acer Aspire One D270.My Screen brightness hotkeys (Fn+L/R) dont work.I installed xbacklight but it always shows "No outputs have ...
tony bui hoang's user avatar

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