A backlight is a form of illumination used in liquid crystal displays (LCDs).
3
votes
2answers
1k views
How do I deactivate dynamic contrast on a Dell XPS?
I am experiencing annoying automatic backlight brightness changes under ubuntu 12.04 LTS on my Dell XPS ultrabook.
It seems to be connected to the amount of white pixels on the screen (switching ...
0
votes
0answers
279 views
Screen brightness doesn't change (Ubuntu 12.04, HP Elitebook 8560w)
I have a HP Elitebook 8560w and I installed Ubuntu 12.04 on it. I can't adjust the screen brightness even though I can use the slider to lower the screen brightness, it doesn't have any effect. I ...
0
votes
0answers
45 views
Brightness control on Toshiba P855-30D
This seems to be a recurring question, but none of the solutions I found here and there seem to work for me. So here are the facts:
Toshiba Satellite P855-30D
Nvidia 640M
BIOS 1.50
Ubuntu 13.04 64 ...
0
votes
1answer
49 views
How to add kernel parameter to EFI GRUB [closed]
Just installed 13.04 (actually Mint but same difference) and for whatever reason, I ended up installing EFI boot rather than legacy as I had done before.
My laptop requires that the kernel parameter ...
1
vote
0answers
104 views
Backlight Control Bar not working
I upgraded my 12.10 to 13.04 and the brightness control has completely disappeared!
In the settings tab all the options are available except the brightness control bar I have attached the screenshot ...
1
vote
2answers
3k views
no back light on my acer aspire 5734z
I installed Ubuntu (12.04) on my acer aspire 5734z and the back light stopped working. I have tried the fix by editing the grub file posted on here a couple of days ago but that hasn't fixed it. I ...
1
vote
2answers
235 views
brightness settings not ajustable
I gave it a search and found this for version 11.04 on an acer aspire;
sudo gedit /etc/default/grub
Edit two lines to read as follows:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash ...
3
votes
0answers
307 views
How to increase the amount of steps of brightness adjustment-key
The screen of my laptop (Dell Vostro 3460) supports 16 levels of brightness: Not only according to the manufacturer, but also as is clear from two OSs: Both Windows 7 and Ubuntu (dual-booted) support ...
1
vote
4answers
3k 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 ...
3
votes
1answer
3k views
Why does Ubuntu reset brightness settings at the loading screen?
Since I first installed Ubuntu 11.10, I noticed that volume and screen brightness get reset every time Ubuntu starts.
Why is this so? And what ways are there to keep brightness and volume levels ...
0
votes
0answers
51 views
Screen backlight is Disabled After Installing Nvidia GeForce 9600m GT Drivers
since several weeks ago, I am in the quest for try to fix the back-light control on my Sony VGN-AW220j With Nvidia GeForce 9600M GT, but until date no luck after try so many recipes and fixes from ...
0
votes
1answer
141 views
Screen brightness stuck on max setting, FN+down only brings it down one level
I'm trying to get some control over the brightness of my Samsung QX411 (Integrated Intel graphics) on Ubuntu 3.04 (though I have the exact same issue on 12.04 and on Mint)
Using FN+up/down lowers the ...
2
votes
1answer
236 views
switcheroo to discrete turns off backlight on laptop screen
AMD cedar/ Intel ironlake hybrid graphics. Custom kernel 3.8.3. Free radeon xorg drivers.
When I switch from integrated to discrete, I do a killall lightdm and X doesn't automatically respawn like it ...
0
votes
1answer
127 views
The dreaded Brightness issue (Fn keys + Max brightness)
I'm trying to get some control over the brightness of my Samsung QX411 (Integrated Intel and discrete Nvidia, though Ubuntu doesn't see the latter yet, I'll play around with Bumblebee later)
Using ...
1
vote
0answers
178 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 > ...
0
votes
0answers
43 views
Keyboard light and screen brightness at 100% after startup
Well the problem is that after every restart the default screen and keyboard light is at 100% and it is quite annoying. Is there a workaround for this?
Thank You! :)
6
votes
2answers
1k views
Reverse-Engineer Driver for Multi-colored Backlit Keyboard on Clevo Laptops
Here's my situation:
I recently purchased a Sager NP9170 (same as the Clevo P170EM) and it has a multi-colored, backlit keyboard. Under Windows 7, you can launch an app that allows you to change the ...
0
votes
0answers
56 views
How does the screen backlight work?
Everything about the backlight settings and controls work for me except:
Backlight resets to max. on every reboot/boot.
The backlight minimum goes on to complete black screen, instead of the minimum ...
1
vote
0answers
1k views
Brightness not working Acer Aspire One 756-2623 [duplicate]
Brightness not working Acer Aspire One 756-2623 with Ubuntu 12.04. Also the mousepad right-click isn't working ether. I'm completely new to Ubuntu and Linux in general.
How do I fix it?
2
votes
1answer
131 views
Keyboard backlight command by percentage
I want to make a keyboard shortcut to increase and the decrease the keyboard backlight brightness.
The command I have for full brightness is:
echo -n 100 > ...
1
vote
0answers
129 views
Backlight control keys with nvidia driver work sometimes
I've got a Vaio S11 laptop with Nvidia 310M graphics running Ubuntu 13.04 with nvidia graphics driver (nvidia-310).
Backlight control started working since I created a .conf file in ...
2
votes
1answer
553 views
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 ...
0
votes
1answer
438 views
How to fix Acer Aspire 4736z back light brightness control in Ubuntu 13.04?
A simple way to fix Acer Aspire 4736z back light brightness control problem using hot keys (Fn + Brightness +-)
0
votes
2answers
409 views
Sony Vaio-Brightness Settings not Changing
I've searched this problem but I cant find a straight answer, If I go into etc/class/backlight there's nothing there. Could someone help?
I have the Nvidia Driver installed, and Fn keys aren't ...
0
votes
1answer
82 views
How to get the oBacklight solution to brightness problem working?
I can set the backlight using xrandr (although the mouse pointer stays sharply bright) but If I suspend the laptop, after waking it up it is on max brightness again.
I have a Dell 17 L702x and I have ...
0
votes
1answer
215 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 ...
1
vote
1answer
92 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 ...
3
votes
3answers
12k views
Keyboard backlight not working on an Asus N56V
See question 166263
The FN keys are not working
Using answer in 166261 question I installed the asus-wmi-dkms_0.2_all.deb.gz package
Now, using xev I see that the keys emit keycodes (for backlight ...
9
votes
2answers
4k views
How to make keyboard backlight Fn buttons work in Samsung Series 9?
I've just installed Ubuntu 12.10 on my Samsung 900X4C. However, I can't get the keyboard backlights to work.
I added the keymaps as per community docs - Samsung Series 9 (section Function Keys). But ...
2
votes
3answers
2k views
Decrease Backlight Below Minimum
I have this laptop that doesn't handle the backlight very well.
In /etc/default/grub, I have added a acpi_backlight=vendor function to get it to work at all. Which is cool, and the backlight now ...
1
vote
2answers
6k views
How do I enable Backlit Keyboard on Asus N56VM
I recently bought an Asus N56VM which is suppose to ship with a backlit keyboard. However on startup and when dark there is no backlit keyboard. When pressing the Fn+F3/F4 buttons, the animation for ...
0
votes
1answer
58 views
Backlight flickers after lid close and switch to battery
Ubuntu 12.10 32bit with Fallback DE. I need to set to Classic for Citrix Receiver to work properly. When screens are maximized with Unity, the mouse is offset.
I can close and re-open the lid if on ...
0
votes
0answers
35 views
Asus K42JZ brightness/backlight returns to max whenever I restart
I have tried almost all the solution available in this forum but I got no luck. Every time I restart my Asus K42JZ, the brightness/backlight returns to MAX. Is there a specific way to solve this ...
2
votes
1answer
1k views
How can I permanently apply this workaround to get the backlight working on an eMachines E525?
There is a display bug that I've been trying to find information on for a while now involving the "eMachines E525 Notebook computer" and it's "backlight", when using Ubuntu, Xubuntu, Lubuntu, and ...
2
votes
3answers
4k views
I cannot change the screen brightness
here's my problem:
Ever since I installed Ubuntu 12.10 on my computer I haven't been able to change the screen brightness, it was always set to the maximum. I did take a look at this post:
Decrease ...
0
votes
2answers
530 views
Dimming the backlight is irreversible on a Samsung Q210 notebook, what do I do?
I'm new to the community, although I have been using Ubuntu since 2010. I have a Samsung Q210 notebook;
Specs:
Intel® Core™2 Duo CPU P8400 @ 2.26GHz × 2
4 Gigs RAM
Nvidia 9200m GS (although system ...
1
vote
1answer
362 views
How to use xbacklight with brightness keys in a VAIO
I have a Sony VAIO VPCCW15FL, with Ubuntu 12.04 installed.
Sadly, the brightness keys do not work out of the box, although the brightness meter reacts to the brightness up/down keypresses.
...
3
votes
3answers
229 views
How do I change the backlight brightness on an iMac 12,2?
Problem: I can't adjust the brightness of my iMac and it's killing me. (My eyes! The goggles do nothing!).
Has anyone gotten this to work?
-Booting with rEFIt 0.14
-Product Name: iMac12,2
...
1
vote
1answer
334 views
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?
...
3
votes
1answer
2k views
How do I make Fn+f2/f3 change the brightness on my HP dv7-6135dx?
The problem described below riddled me for quite a while and couldn't find a straight forward answer anywhere online. I have found a solution and I would like to use this post as a documentation ...
1
vote
1answer
207 views
Brightness and actual backlight mismatch after reboot
This is not a duplicate of this or that!
The problem in detail
The brightness hotkeys works well in increasing or decreasing the brightness, but if the brightness is less than 100%, after a reboot ...
0
votes
0answers
202 views
No backlight when installing Ubuntu 12.10
I know there are multiple threads covering this issue, but I did not find anything similar to mine.
I have an Acer Aspire 5741 here and I'm trying to install 12.10. However, my backlight goes off as ...
2
votes
1answer
199 views
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.
0
votes
0answers
238 views
Backlight brightness at Toshiba Satellite L850-DJS Ubuntu 12.10
I have bought laptop Toshiba Satellite L850-DJS. I replaced windows8 with Ubuntu 12.10, and I have problem: screen backlight brightness doesn't changing anyway.
I installed ATI proprietary video ...
1
vote
0answers
269 views
Why can't I adjust the screen brightness?
I have a Toshiba Satellite laptop with an AMD 64-bit/Radeon HD video card, running Ubuntu 12.10. I can't adjust the brightness from the default maximum, neither the Fn keys nor the system settings ...
0
votes
0answers
97 views
No Blacklight with Nvidia 310.14 driver
With the new Nvidia 310.14 experimental driver I have essentially no backlight on my laptop screen. xbacklight and xrandr report the brightness as 100%, but its literally like the backlight is ...
0
votes
0answers
197 views
Mac Keyboard Backlight ubuntu 12.04
Running Ubuntu 12.04, I can't get the keyboard backlight on a Macbook Pro (mid 2012) to turn on. When I press the brightness button, the display shows up on full but the lights do not turn on. It ...
2
votes
3answers
2k views
Backlight Issue - Samsung RV509 Notebook
I installed Ubuntu 12.04 today on my Samsung RV509 Notebook (Nvidia Geforce 315M) and the backlight brightness controls don't work on it.
I did some digging around the web and found the samsung tools ...
3
votes
2answers
766 views
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 ...
1
vote
0answers
154 views
Nvidia control function key with xbacklight
I aways had problems with nvidia brightness control, and since 2009 I use the nvidiabl. But there is a issue that brightness sometimes came back to full backlight.
So, since the nvidia is with new ...
