Questions tagged [brightness]

Questions related to screen brightness.

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Reduce brightness on external monitor in Wayland in 17.10

I used to be able to control the brightness of my external monitor using xrandr. How do I do this with Wayland? The brightness control in the upper-right corner does not do this. /sys/class/backlight/...
bshanks's user avatar
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166 views

trouble with sudoers file, NOPASSW not working

I am trying to run a script that changes the backlight, but requires root priviliges using a keyboard shortcut. Since I dont want to type in my password everytime I change the brightness, I want to ...
sevbesau's user avatar
2 votes
1 answer
116 views

(Unity desktop) My applications became darker for unknown reason

My display freezed and I had to forcefully restart my laptop. I restarted with „systemctl kexec” through SSH. Since then, my applications are rendered darker than usual for no apparent reason. Not ...
MegaBrutal's user avatar
2 votes
0 answers
204 views

FN buttons on Ubuntu 17.04

I have installed Ubuntu 17.04 on Acer v3-571G and I want to bring back my FN function buttons functionality like Volume Up and Volume Down, also Brightness controlling functions. I have tried so more ...
Sahib Huseynov's user avatar
2 votes
0 answers
631 views

Screen Brightness Ubuntu with nvidia driver

So far, I've tried this solution to my problem: Brightness not working after installing NVIDIA driver Actually, I don't want to create a global x.org file, I want to create: /usr/share/X11/xorg....
davidbaumann's user avatar
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823 views

Brightness control not working on 2009 MacBook

After I installed the proprietary Nvidia drivers on my mid 2009 MacBook Pro running Ubuntu Gnome 16.04 the brightness control doesn't work. It works when I am using the open source driver, but I need ...
collintheonly1's user avatar
2 votes
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167 views

Ubuntu Server 17.04 console dimming

I'm installing ubuntu server 17.04 on an old pentium 4 machine connected to a basic hp flat screen monitor, nothing fancy. If I installed a basic server with only basic utilities enabled I get ...
tanno oba's user avatar
2 votes
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90 views

invert window preserving hue

I love the invert window color feature in compiz, however I would love to be able to invert just the brightness, preserving the original hue. What I'd like even more would be a global feature across ...
Sam Johnson's user avatar
2 votes
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185 views

Automatically and progressively dim and warm screen

I would like to automatically dim the screen from 100% to 20% and get the color temperature from 5000 K to 2000 K. It should be progressive from 8pm to 11pm and it should turn off at 5am. Here are ...
Alejandria's user avatar
2 votes
1 answer
2k views

Monitors wont go to sleep and screen won't lock in 16.04

My ubuntu 16.04 with gnome desktop won't go to sleep or lock the screen. In the power options menu I have set 'blank screen' to 5 minutes, and 'dim screen when inactive' to on. Also, I noticed that ...
Odin Mugabe's user avatar
2 votes
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1k views

Brightness control doesnt work ASUS Ubuntu 16.04

I installed Ubuntu 16.04 recently, and had a problem with the Fn+F5 and Fn+F6 keys on my Asus K401UQ not changing the screen brightness. I tried the methods that were posted on different forums, about ...
Gman007's user avatar
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Weird behaviour in ubuntu 14.04

Something weird has happennd to my machine since yesterday. I recall, I had not shutdown it before that and it got switched off as battery ran out. Now, following things are occurring Taking long ...
mtk's user avatar
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370 views

Asus laptop backlight keys not working

I have an asus F554L laptop and the fn + f5, f6 brightness control keys are not working. I can control the brightness through settings. I have tried adding pcie_aspm=force acpi_osi= to ...
Àlex Torregrosa's user avatar
2 votes
1 answer
1k views

My eyes get tired when I use Ubuntu, but not when I use Windows?

This is a weird question, but it's one of the few reasons I haven't entirely switched to Linux yet. I have a ZenBook UX305 with Ubuntu Gnome and Windows 10 dual boot. For some reason, when I use ...
boyski33's user avatar
2 votes
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2k views

How to control the RGB components for gamma+brightness+contrast from command line?

I saw this on nVidia application. We can control, for each component of RGB, these 3 values: gamma, brightness and contrast (below showing only for Red component): So, I want to know if we can access ...
Aquarius Power's user avatar
2 votes
1 answer
1k views

screen brightness keys stopped working -- ubuntu 14.04 LTS -- HP notebook

I installed Ubuntu 14.04 LTS last week on my HP Pavillion DV6700 notebook. It was working perfectly until last night when I turned on the notebook and noticed the screen brightness was set to the ...
Luís Muniz's user avatar
2 votes
0 answers
207 views

Dim screen with transparent black image

The LCD backlighting of my notebook's screen uses PWM to dim the display, and because of this, I experience eye-strain whenever I lower the brightness. Maximum brightness however seems too much in ...
jdoe's user avatar
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Unable to change brightness on lock sccreen

When at the lock screen, I am unable to adjust the brightness. This is particularly annoying if the screen is completely off (to save battery) and then locks automatically. You then have a black ...
Jon's user avatar
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224 views

How to change screen brightness from commandline on Asus X453?

I'm using the Fluxbox window manager on Ubuntu 12.04. I recently got my desktop into a strange situation, and I'm not sure how! The situation was this: If I close the laptop screen lid and then re-...
joeytwiddle's user avatar
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Screen Brightness not increassing after using "xrandr --output eDP1 1.0

Earlier I was not able to decrease screen brightness from keyboard (It was at its maximum), then I tried: xrandr --output eDP1 --brightness 0.5 Now screen is sufficiently dim now, but now at times ...
user2850027's user avatar
2 votes
1 answer
56 views

Ubuntu 14.04 brightness preference option

The lighting preference option seems to allow increased lighting adjustment but after re-setting the screen darkens! When I check the setting it has returned to the previous position. Is there a ...
frail trev's user avatar
2 votes
0 answers
285 views

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 ...
dadexix86's user avatar
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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
2 votes
1 answer
486 views

Brightness control not available in ubuntu 14.04 acer veriton desktop

I have just installed ubuntu 14.04 on acer veriton desktop and can not reduce the screen brightness. Below is a screen shot of the 'brightness and lock' settings. Unfortunately it does not show any ...
user90041's user avatar
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Error request power-well from i915 ( Lenovo L440 - Ubuntu 14.04)

I'm using Ubuntu LTS 14.04 on my Lenovo L440 and until yesterday I hadn't experienced any problems, when I started my laptop and received the error message: [ 3.331621] hda-intel Error request ...
Neonoia's user avatar
  • 21
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682 views

Getting Ubuntu to work on Thinkpad E145

tl;dr at the bottom I just bought a brand new Lenovo Thinkpad E145, without any pre-installed OS. I wanted to get an Ubuntu distribution so i can run gnuplot and similar stuff, just things for ...
Ultragaul's user avatar
2 votes
0 answers
308 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 ...
Sergio Fernandes's user avatar
2 votes
1 answer
366 views

How to add brightness key to dconf

I recently downloaded Ubuntu 14.04 and did a clean installation. I noticed that Ubuntu 14.04 does not store screen brightness settings. how can I add a value to dconf to store brightness settings? I ...
Xenonamous's user avatar
2 votes
0 answers
2k views

how do I turn off webcam brightness auto-adjust?

My Logitech web camera adjusts brightness automatically and I don't like it. I wonder how I could turn this feature off from ubuntu. I downloaded v4l2ucp that seems to be a program to do just that, ...
Jani Kovacs's user avatar
2 votes
0 answers
2k views

Max Brightness in ubuntu lower when compared to windows

I've installed Ubuntu 14.04 on my (new) ThinkPad Edge330. Everything worked quite well so far. I've noticed that the screen wasn't that bright and was a bit disappointed of the ThinkPad, but then I ...
sklingel's user avatar
2 votes
0 answers
827 views

Brightness fn key adjustment problems

My brightness function key controls work after setting grub boot parameter to "acpi_osi=" but using them I cannot adjust the brightness higher than around 70% (there is empty bar left over ...
npCoder's user avatar
  • 31
2 votes
0 answers
2k views

Ubuntu 14.04 Intel Brightness After Resume

I recently installed Ubuntu 14.04 on my Dell Inspiron laptop. Seeing that my hotkeys didn't work, I followed the instructions here and everything was going smooth. Except for when I close the lid to ...
SarTheFirst's user avatar
2 votes
0 answers
865 views

Cannot lower brightness in Ubuntu 14.04 with amd drivers

So I cannot adjust my brightness at all. It is always at the max and I have tried updating the grub with acpi_osi=linux & acpi_backlight=vendor & acpi_osi= & acpi_osi=Linux acpi_backlight=...
user2835532's user avatar
2 votes
0 answers
82 views

Black screen after screen off on 13.10

I swtiched "Turn screen off when inactive for" to 3 minutes and Lock screen after screen goes off to on. The problem is that after the screen is off, when I try to come back I can`t do anything, the ...
Andu's user avatar
  • 43
2 votes
0 answers
180 views

How can one increase the timeout before the display dims when on the battery?

If I do not touch my computer (a Toshiba Satellite) for 15 seconds when running off the battery, the screen dims to the lowest brightness. I have already disabled "Dim screen to save power." I do not ...
user248721's user avatar
2 votes
1 answer
99 views

Adjusting default brightness upon boot

When I boot to ubuntu 12.04, the back light on my display turns off and I have to press the increase brightness button 4 times to get it to the desired brightness. Is there a terminal command I can ...
smokngunslinger's user avatar
2 votes
1 answer
950 views

Brightness slider gone, and the brightness is constantly jittering

I've just installed a clean version of 13.10 on my MSI U123. Before I've used 12.4 without a hitch. As soon as I entered the brightness and lock settings window the brightness starts to flicker and ...
Mephy's user avatar
  • 21
2 votes
0 answers
2k views

reduce laptop screen brigtness below minimum

This is not duplicate of https://superuser.com/questions/560445/dim-screen-past-the-minimum-on-ubuntu . I have already tried the solution mentioned in the above article. my laptop configuration is ...
user2540327's user avatar
2 votes
1 answer
104 views

Xubuntu 13.10: Only four levels of brightness?

Why do I have only four levels of brightness on my Dell Inspiron laptop, selectable by Fn+ArrowDown/Up? In Linux Mint Mate, I have 7 or 8, and so I have under Windows, on the same machine? This is ...
ubuplex's user avatar
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2 votes
1 answer
1k views

Auto-change in brightness after reboot Ubuntu 13.10

I have noticed that after I set the brightness (High to Low) in Ubuntu 13.10 and then after when I do my work. After rebooting up the PC, the brightness again turns to High. I'm literally tired of ...
Hitesh Maheshwari's user avatar
2 votes
0 answers
2k views

Can't control screen brightness on saucy on Acer Aspire 5755 and Acer Aspire V3-571G

I can't control the screen brightness in Ubuntu 13.10. I tried the way that worked for me on 12.04, 12.10 and 13.04: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" but it doesn't work on 13.10. My ...
HOS's user avatar
  • 192
2 votes
0 answers
214 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 ...
user177480's user avatar
2 votes
0 answers
1k views

Can't disable backlit keyboard on Sony Viao, Ubuntu 13.04, 64bit

I need to turn off the backlit keyboard on my Sony Viao, with 64 bit Ubuntu 13.04. I'm prone to migraines, and the lights really bother my eyes. I've tried several posted solutions, none work. (...
Debbie V's user avatar
  • 121
2 votes
0 answers
4k views

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
  • 21
2 votes
1 answer
2k views

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 ...
To Do's user avatar
  • 15.5k
2 votes
0 answers
262 views

Amd catalyst drivers increases screen contrast if laptop is on battery power

How to prevent catalyst drivers from increasing contrast if I switch from power supply to battery power? One oddity about this is that increase in contrast isn't shown in the drivers settings, e.g. if ...
user148977's user avatar
2 votes
0 answers
506 views

ATI HD 6320 ASUS Brightness doesn't change

When i press Function + [F5 or F6] to increase or decrease the brightness, the adjustment display on top right pops out and the slider moves but the screen brightness remains the same. i've done ...
AFwcxx's user avatar
  • 101
2 votes
2 answers
3k views

Unable to change Screen Brightness on Toshiba Laptop Ubuntu 12.04

I have a Toshiba Satellite C655D-S5209 with Ubuntu 12.04. I am unable to change the screen brightness. Fn+F6 and Fn+F7 move the brightness indicator, but actual brightness does not change. I have ...
Dave's user avatar
  • 21
2 votes
1 answer
1k views

How can I enable brightness control on my iMac 11,3?

I have Apple iMac 11,3 (27" LED, purchased in 2011) with a Radeon HD 5750 graphics card. When I installed Ubuntu 12.04 LTS, everything works fine except brightness control. I want to mention that I ...
carkaci's user avatar
  • 201
2 votes
3 answers
775 views

Video brightness unreadable on a Dell Inspiron 9400

I have a Dell Inspiron 9400 with an NVidia GeForce Go 7900 GS video card. After upgrading from 12.04 to 12.10, my video brightness decreased to the point where I can hardly read the screen. I have ...
Bruce's user avatar
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