Questions related to screen brightness.

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3
votes
4answers
1k views

Laptop brightness does not change

I have just installed Ubuntu 13.10 and am trying to adjust my laptop screen brightness. My laptop Dell studio 1558 has a key to change the screen brightness; however, when I reduced brightness to zero ...
1
vote
0answers
579 views

Ubuntu 15.10(wily) Brightness control not working

The brightness buttons and the brightness control in system settings in Ubuntu 15.10 have suddenly stopped working. They were working fine at first(after I upgraded from 15.04). I have no Xorg.conf ...
1
vote
1answer
82 views

Custom command - one less than current brightness level

I tried using xbacklight, but it wasnt working so I made some custom global commands to control the brightness. For example: "Bright" : sudo bash -c "echo 20 > ...
0
votes
1answer
95 views

Raise and lower screen brightness (both from menu and from keyboard)

I'm working on an Acer Aspire E15 with Ubuntu Studio 14.04 installed in dual-boot with Windows 8.1, and from Ubuntu I'm not able to modify the screen brightness, for two reasons. The first is that I ...
6
votes
2answers
2k views

2 folders in Sys/Class/Backlight?

ISSUE: Backlight brightness does not change. More Detail: Brightness will not change, using both 'System Settings->Screen', or Fn keys (Brightness bar shows and moves, but screen brightness does not ...
1
vote
0answers
94 views

Hotkeys and slider for brightness don't work

I have an Intel processor with no graphics and Nvidia GTX980M with Nvidia driver. I just installed Ubuntu Gnome 15.10 and everything works fine except for the brightness controls. Changing both from ...
0
votes
0answers
35 views

Change default brightness level in Ubuntu 14. 04 LTS / Brightness is reset to Maximum on every Restart on Ubuntu 14.04 LTS [duplicate]

Recently I was going through the link below (Brightness is reset to Maximum on every Restart) and was trying to change the default brightness level on my system as its very annoying as the default ...
1
vote
1answer
108 views

Brightness control is not working

The brightness control in the settings does not work. I have an Intel® HD Graphics 4000 (on a i5-3570K Processor) and run Ubuntu 14.04.03. I followed the instruction given in ...
108
votes
20answers
103k views

Brightness is reset to Maximum on every Restart

The brightness of my laptop is reset to Max on every restart. I tried the solution provided at this website but had no luck. ...
0
votes
1answer
97 views

Ubuntu 14.04 fn keys starts to work after resume from sleep

I have a problem with Ubuntu 14.04. After fresh installation none of the fn keys didn't work except for fn+f3 combination - which is sleep. After resume from sleep all fn keys (brightness, power, ...
0
votes
1answer
109 views

15.10 Dell Vostro 3700 display brightness fn+key change problem

I have 15.10 default install, no any changes to /etc/default/grub. Now when I press Fn + arrowUp/Down I can see display brightness change notification. Moreover, /sys/class/backlight/acpi_video0/* ...
0
votes
2answers
716 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
1answer
66 views

Ubuntu screen brightness issue only at startup

Ubuntu 14.04 / Windows 10 dual boot The laptop can´t remember brightness before, but after manually set the brightness in the rc.local file, it can now remember the brightness level after boot into ...
0
votes
0answers
86 views

Strange problem with backlight (it worked and now no more?)

EDIT : It's started working again?! i went out on friday night and i left pc ON. This morning it was working. looking in syslog i saw this : Dec 10 22:41:00 LittleHP kernel: [ 262.553256] video ...
0
votes
0answers
18 views

How can I change my brightness on my two monitors via keyboard shortcut/key

I am using Ubuntu 14.04 LTS with two monitors and an apple keyboard with brightness keys. I have done some research and have come up empty handed. I an wondering if there is any way to connect my ...
0
votes
0answers
43 views

Cron job to set screen brightness not working in ubuntu 14.04

In the terminal, I ran: crontab -e Then I added the following cronjob in the file 26 21 * * * /usr/bin/xbacklight -set 80 This was supposed to set the brightness to 80% at 9:26 PM. But its not ...
0
votes
1answer
43 views

How do I set brightness to a lower level in lubuntu 12 (HP laptop)?

I tried everything I found online, but none of the methods I found worked. The buttons don't work, and there's no such thing as "Brightness" in Monitor Settings. I tried xbacklight -set but it didn't ...
0
votes
0answers
76 views

Changes in system screen brightness aren't reflected on actual screen. [Ubuntu 15.10][Laptop]

I've had this issue since 14.04.3 but I never bothered to fix it since I didn't use Ubuntu much. Pressing the brightness up/down function keys brings up the popup displaying the brightness level, ...
2
votes
1answer
162 views

Incompatibilities between ASUS G771JW and Ubuntu 14.04 LTS

I've just bought an ASUS ROG G771JW laptop. I installed Ubuntu Desktop 14.04 LTS here. I tried installing the driver for the NVIDIA GTX 960M inside it, but after restarting I've got a 640 x 480 ...
1
vote
0answers
33 views

Screen dim after booting, need to suspend and resume to fix it

I'm on Ubuntu 15.10 and the screen is very dim on startup (even the manifacturer's splashscreen), and I need to suspend and resume it in orther to fix the issue. This has happened on 15.04 and 14.10 ...
3
votes
3answers
883 views

Maximum brightness is not maximum brightness

On my dual boot laptop I noticed that maximum brightness in Ubuntu and Windows 8 is totally different. In Windows 8 the screen is much much brighter at maximum level than it is at Ubuntu maximum ...
0
votes
0answers
22 views

Cannot change screen brightness and f.lux does not work either

There is a problem which I find very annoying. Of course I tried to solve it by googling first but nothing I tried worked so far. I recently moved to Xubuntu and I used to change my brightness ...
0
votes
2answers
3k views

13.10 brightness flickering MSI Wind U100

Vanilla install of Ubuntu 13.10 on my MSI Wind U100. Intel graphics card I think. Auto brightness flickers up and down, brightness hud display top-right also flickers. Interrupts input so need to ...
0
votes
0answers
42 views

Can not get my brightness to change

Happened on Ubuntu before, I could not fix it. Now same issue with Xubuntu. What I've tried: I tried all those sloutions below. Not a single on of them worked. Apps like F.LUX does not work either ...
1
vote
1answer
205 views

Brightness Control : Asus X453MA : Xubuntu 14.04

I cannot adjust the screen brightness using the Fn keys. I have scoured the net to find a solution and so far this is what I have : I've tried creating/editing ...
9
votes
3answers
6k views

Ubuntu 14.04 Brightness issue with nvidia Quadro

I recently upgraded from Ubuntu 13.10 to 14.04. Everything is fine, except the brightness of my laptop screen. When I change the brightness the screen simply does not respond. I figured this was a ...
0
votes
1answer
471 views

How to stop screen from dimming when power cable is unplugged?

On HP Pavilion with Ubu 14.04 LTS, screen automatically dims when power cable is unplugged. I sometimes want to have maximum brightness, even when power cable is unplugged, for personal reasons. How ...
3
votes
0answers
238 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 ...
1
vote
0answers
38 views

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 ...
0
votes
1answer
41 views

How to switch the screen illumination off and continue typing? [duplicate]

I can switch the screen illumination manually off by pressing Fn+F6 on my laptop keyboard. This is the same as automatically switching it off on idle as it can be set in the power management. The ...
0
votes
1answer
510 views

FGLRX drivers boots without backlight

Fglrx Not working after install (I know) HW : Asus K72j with AMD HD5470 laptop So, after installing the ATI drivers fglrx on my ASUS K72J laptop via CL my screen booted black. So at first I thought ...
1
vote
0answers
85 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 ...
0
votes
0answers
32 views

I no longer have access to the system menu

I was trying to change my brightness and issued a command sudo setpci -s 00:02.0 F4.B=80 Later I installed xbacklight using the following command sudo apt-get install xbacklight Then changing my ...
0
votes
0answers
16 views

Prevent OS from setting 0 brightness

I'm using ubuntu 14.04 and on pressing "brightness minus" key, the brightness of the screen does decrease but, if I keel holding/pressing the button,the brightness decreases all the way to zero and ...
0
votes
1answer
94 views

Ubuntu brightness max_level

Notebook is Lenovo IdeaPad Z500. Ubuntu 14.04 LTS with latest updates. When I first time clicked on F12 (which change brightness up by default) light become lower, but not 0 (I see the text, but it's ...
0
votes
1answer
117 views

is there a command to turn on keyboard lights?

I just updated the BIOS of my friend's Dell Latitude E6420 (from A08 to A22) and found out that the keyboard has a back light! There is a FN+Key which toggles thought the scales of brightness, maybe ...
4
votes
6answers
12k views

Brightness control doesn't seem to work on a Toshiba Satellite M115 laptop

I have Ubuntu 12.04 LTS on a Toshiba Satellite M115 laptop. The brightness control doesn't seem to work with the "brightness and lock" setting or fn+f6 and fn+f7 (which usually works in Windows). How ...
0
votes
1answer
171 views

Can't Adjust Brightness In ASUS X401U

i have a problem with my Ubuntu 14.04. I installed it on my ASUS X401U and i can't adjust the screen brightness trough the Fn. key or system setting. i have tried some way like edit the grub file. but ...
0
votes
0answers
21 views

No brigtness control on Toshiba Satellite running ubuntu 14.04 LTS [duplicate]

running ubuntu 14.04 lts on a toshiba satellite I have no control of bightness. How can I fix this?
0
votes
2answers
915 views

I can not increase or decrease the brightness of my screen on UBUNTU 15.10 [duplicate]

just wondering if anybody knows what's the problem. I use the brightness bar control with my keyboard or in options, the computer shows me the brightness bar increasing or decreasing but the screen is ...
0
votes
0answers
191 views

Brightness control not working FN keys ubuntu 14.04/15.10

I have a toshiba laptop C855D-124 with an AMD/ATI, and since i installed the graphic card drivers that i can't adjust the brightness.... the FN key works with the other options, just not the ...
1
vote
2answers
2k views

Disable brightness and keyboard back-light at start-up?

I'm new with Linux and I have an issue that I have being researching and have not been able to find a solution so far. I was wondering if any help can be given. I have an Asus Q500A with Win-8 and ...
5
votes
5answers
7k views

Can't adjust brightness on my MSI VR420 laptop

Using every method possible I'm unable to change my laptop brightness.. It's stuck on super max brightness.. Using the slider in the "screens" window int he control panel doesnt do anything, and using ...
1
vote
1answer
2k views

Asus eeePC - Screen Brightness Issue

I have ASUS 1015CX Netbook on which I have installed Ubuntu 12.04LTS. All seem to work fine however there is an issue with brightness settings; changing the brightness (both through settings and with ...
0
votes
0answers
42 views

Problem with backlight

I always have problems with brightness control in my computer,(I have intel graphics HD 400) Until yesterday, I was running ubuntu 15.04 without problem at all. I just have to modify grub with these ...
1
vote
0answers
43 views

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 ...
0
votes
0answers
36 views

Windows & GRUB Screen not displaying

I have a Windows-Ubuntu dual boot that worked fine till a few days ago. I upgraded to Windows 10 last month & the dual boot worked fine after that. Suddenly, the GRUB screen & Windows OS (when ...
16
votes
4answers
23k views

How do you change brightness, color and sharpness from command line?

I am controlling my PC with SSH and scripting. How can i change the brightness, color and sharpness from command line? Try 1: failed $ sudo redshift -t 5000:5000 -g .5 Cannot list GNOME panel ...
0
votes
0answers
14 views

Macbook brightness using WRONG folder

I am running ubuntu 14.04 with macbook pro mid 2012 Brightness is not working using the function keys. I'm pretty new at Linux, but I know why it is not working, just not how to fix it. #Under ...
2
votes
1answer
37 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 ...