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Questions tagged [backlight]

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

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How do I load keyboard backlight at boot?

I would like to turn on my keyboard backlight at boot so I don't have to manually with terminal at each boot. The code that works for me in terminal is "sudo xset led 3". Without quotes. I tried ...
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Brightness control problem Ubuntu 18.04

Recently yesterday at Friday, I got to try my laptop to run Linux and it worked. The brightness was controllable until I tried to reboot it. After rebooting, somehow during the start up I tried ...
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Turn off backlight at BlankTime in sunxi

I have an embedded system with armv71 and Ubuntu 16.04. It has only a touchscreen (so no mouse or keyboard attached) and runs Chromium in kiosk mode, without a desktop (only X and openbox). As the ...
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Keyboard back-light was working but then stopped working hp spectre x360

I have debian 9 installed on my hp spectre x360, and the keyboard backlight used to turn on and off when I hit the 'f5' key, but now the light is unresponsive and remains off no matter what I try. I'm ...
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HP Backlight keys not working in 18.04

I installed 18.04 on a HP laptop, and at first the backlight keys were working fine, then I installed the Cinnamon Desktop environment and thereby also the lightdm display manager. Since I didn't ...
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18.04 Lenovo ideapad backlight

I've spent many hours trying to find a solution but nothing seems to work. I've successfully installed Ubuntu 18.04 on Lenovo G505S laptop in UEFI mode with just nomodeset flag added to grub. ...
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155 views

Lubuntu brightness/backlight issue

I freshly installed Lubuntu 18.10 with LXQT environment and here's my issue : I want to dim the backlight of my laptop with the keyboard shortcut (XF86) but when i press it, it changes the brightness(...
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Ubuntu 18.10 and MacBook Pro (12,1) issues

After an upgrade to 18.10 (from 18.04) I have the following issues: The laptop will not wakeup by opening the lid. (power button only) The keyboard backlight buttons are not controlling the backlight....
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Keyboard backlight levels cannot be set anymore on Ubuntu 18.10

I'd like to report this issue as a bug, but I need to identify the system package for this. Could anyone help me out? I'm using Ubuntu 18.10 and I can no longer set my laptop keyboard backlight ...
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40 views

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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41 views

Cannot set the screen brightness via PCI

I was trying to use xbacklight to set my monitor brightness under the i3-wm. But nothing was happening after typing: xbacklight -dec 10 To investigate I tried to set the brightness via the PCI bus ...
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144 views

How do I install Iris on Ubuntu 18.04?

I downloaded the 64-bit zip file but I've been unable to find the solution. The Iris website That happens when I try the "extract here" option. Regards
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I can't turn off asus keyborad backlight. No `/sys/class/leds/asus::kbd_backlight` dir

blurhy@blurhy-FX503VD:/sys/class/leds$ ls asus-wireless::airplane input15::kana input4::capslock phy0-led input15::capslock input15::numlock input4::numlock input15::compose ...
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2answers
102 views

Security risk with scripts that write to /sys/class

I was looking for a way to make my laptop's special keys work with i3-wm. I ran into this post and used the script there to create my own. This is what I came up with for the screen brightness (on my ...
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25 views

No backlight/brightness control

This issue is really starting to get to me. I try some things, they dont work, I forget about it, come back to it, yada yada. I get the iMac is dated but the NIC goes into monitor mode and the ...
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dbus spam relating to intel_backlight.device

Sometimes the following happens. Fans start constantly running and polkitd is 25% CPU. dbus-monitor --system shows the following sort of thing repeating very rapidly: signal time=1537057403.524844 ...
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Need help turning off the backlighting of My Sony Vaio laptop

I have tried almost everything - this AU question is the last option. I have set-up Ubuntu through a subsystem on Windows 10 to perform this. I just need the right guidance for success. I tried an ...
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1answer
237 views

Cannot change keyboard backlight with dbus-send

I have kde desktop environment, and Fn + F3 / F4 buttons cannot change keyboard brightness. I also assign other keys to increase or decrease keyboard brightness in global shortcuts menu, but its not ...
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287 views

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 ...
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1answer
300 views

Little help with logitech g910

New Linux Ubuntu user here. After looking after some drivers for this keyboard, I found this on github. https://github.com/MatMoul/g810-led I have managed to install this, and the rainbow effect ...
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1answer
553 views

Tongfang GK5CN6Z Ubuntu Touchpad and keyboard backlight

I just bought a Tongfang GK5CN6Z and I'm using Ubuntu 18.04 with kernel 4.15.0-33, but the touchpad and the keyboard backlight isn't working. And I can't find anything about it on the net. Can ...
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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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Alienware M14xR1 Keyboard backlight colour change

I got an Alienware M14xR1 recently but unable to change backlight colour and by default it is permanently blue, is there any method or script which help in change in color.
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1answer
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Backlight issue ASUS T300 Chi after booting

Introduction I am having trouble with my screen backlight after booting, so when I first enter the login screen. I am running Ubuntu 18.04 bionic. It is a fresh install, fully updated. Probably you ...
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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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Screen brightness reset to Max after every restart [duplicate]

Every time my PC Ubuntu 18.04 LTS turn off and then turn it back on the brightness is always set back at the maximum. I like to use lowest brightness for my pc. I've tried using xbacklight set ...
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93 views

ASUS FX553VD keyboard backlight is not controllable (FN+Down, FN+Up keys)

Notebook: Asus FX553VD (Intel Core i5-7300HQ nvidia gtx 1050) I was investigating how to get this controllable, but did no luck with that. I find that there is maybe a fix, if you patch one file ...
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2answers
3k views

Screen brightness in Ubuntu 18.04

So at first even the brightness key (via Fn button) used to work in Ubuntu 18.04. After an update, i can't even change it from the setting. And with the keys, it just show the icon of the screen ...
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480 views

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 ...
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1answer
1k views

No brightness control 18.04 LTS: /sys/class/backlight is empty

I know this issue had been addressed in the past (like this, this, this, this, this, this and more), but none were actually given a definite answer. To begin, I'm using a NVDIA GTX1080 Max-Q graphic ...
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190 views

Ubuntu 18.04 Backlight

Running dual boot ubuntu 18.04 and Mac Os on 5.4 mac book pro. Problem is that the backlight for the LCD never shuts off. Never had a problem with 17.10.
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Backlight on Vaio SVE

I've recently installed Ubuntu 16.04 on my Vaio SVE. Almost everything works fine, but the keyboard backlight insists on stay off. I tried many solutions from different forums and nothing works, like: ...
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1answer
386 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 ...
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1answer
543 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 ...
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2answers
467 views

Lowering screen max brightness with Ubuntu 18.04

I'm trying to set a limit for maximum screen brightness on my Thinkpad X250 running Ubuntu 18.04. A bit of context : I changed the original screen with a new one (before installing Ubuntu), the ...
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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 ...
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93 views

How to alter backlight driver in lubuntu

My question is - if I have a command (tee ...brightness<<<#) and/or driver (nouveau & nv_backlight) that is able to alter my laptop's brightness setting, is there a straightforward way to ...
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Xubuntu 18.04: make Fn brightness keys work with /sys/class/backlight/nv_backlight/

I have an old laptop, oldtimer linux fellow, and updated it to xubuntu 18.04. After some sleep/resume problems with the proprietary nvidia-340 driver, I decided to try the nouveau. Sleep/resume ok. ...
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1answer
25 views

Command not giving any output

ls /sys/class/backlight/ is not giving any output on my terminal. I have Ubuntu 17.10 dual booted alongside Windows 10 on my Alienware r3 15. I need to solve this issue to try to fix my main issue ...
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1answer
713 views

How do I turn off backlight of keyboard?

I've tried xset led 3, xset led off, xbacklight -set 00, sudo find /sys/devices/platform/ -name leds returns nothing, so I couldn't try that. sudo find /sys/devices -name leds returns /sys/devices/...
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505 views

Sony Vaio Backlight

Already posted in Community, but got locked and moved, and got lost, sorry. Here's the issue: I'm using Ubuntu in a Sony Vaio SVF15A17CLB, which has a backlit keyboard, but it's not turned on by the ...
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10answers
10k views

Display brightness cannot be adjusted 18.04

I have recently installed Ubuntu mate 18.04 on my XPS 15 9560. I cannot adjust the display brightness through any means. I have tried the following: Set the acpi_backlight=vendor in boot parameters ...
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1answer
453 views

Unable to change the screen brightness

I have an Alienware r3 15 laptop in which I've recently installed Ubuntu 17.10(dual boot with Windows 10). So far everything's fine except that I am unable to find any setting(if any) to change the ...
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0answers
60 views

How can I use my brightness control keys?

I'm recently trying ubuntu mini.iso with openbox wm and really enjoying it. But I can't control my brightness with special keys on my laptop. Before this I've tried Xubuntu and these keys were working ...
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2answers
376 views

Cannot adjust Brightness 16.04

Complete newbie here. I have installed Ubuntu and love it, but the screen brighness is far too low. I cannot use the computer in the daytime. I have insalled Ubuntu single boot in an intel iMac with ...
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365 views

Brightness not working on ubuntu 17.10, broken upgrade from 17.04?

There are multiple similar questions present, but none addressed my concern. I recently upgraded from 17.04 to 17.10. Full story: I start the system: Dell logo -> a dark maroon screen -> Display is ...
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111 views

Black screen after suspend (iMac 11.2, Ubuntu 16.04)

On my iMac (mid-2010, specs) I have Ubuntu 16.04 with a recent kernel update (4.15.10) but am still not able to recover from suspend. I have been able to figure out how to wake up the computer with ...
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2answers
543 views

Lenovo Legion Y720 keyboard backlights not working

Is there someone successfully managed to make working Lenovo Legion Y720 keyboard backlights. Tried some of the instructions that are out there so far nothing. Also upgraded the kernel to 4.15.9-...
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0answers
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Display brightness inversed on Toshiba Satellite L555

I installed Ubuntu Mate 17.10 on my Toshiba L555 and the control of the brightness now works inversed, very annoying when enabling the dim function in the power manager as the display goes brighter ...
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3answers
3k views

The brightness of laptop screen cannot be adjusted with either the buttons or the slider. Edit

I have Ubuntu 17.10 installed on a MSI GT72VR laptop with a single nVidia GT1060 graphics card, grub2 as a bootand Unity as a desktop. I can't change the brightness in any way. Bright always is 100%. ...