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

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921 views

Backlight problems with 12.04 on my Acer Aspire 4736z

How can I fix a bug that wouldn't let me turn the backlight on after it turns off automatically when I close the lid or when powersave settings kick in? I also can't adjust the brightness of the ...
6
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2answers
4k views

How to disable Macbook keyboard backlight

How do I disable the keyboard backlight, by turning it completely off, on a Macbook in 12.04? Whenever I reboot, Ubuntu sets the backlight to 100% brightness, and frustratingly the new function keys ...
6
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1answer
685 views

Can you help me write a script to set a new default brightness for the screen/keyboard after login?

On my Macbook Pro Ubuntu alsways boots with... keyboard brightness at maximum illumination screen brightness at maximum illumination ...both which I need almost never during normal usage. ...
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2answers
5k 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 ...
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1answer
4k 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 ...
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2answers
2k 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 ...
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3answers
3k 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 ...
2
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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 ...
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2answers
2k views

Backlight not on during Ubuntu 11.10 Installation HP Folio 13

I have a HP Folio 13 B2A32UT and I am trying to install Ubuntu 11.10 64bit, But unfortunately after it shows the purple screen, with the little human and the keyboard in the bottom of the screen and ...
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1answer
1k views

Ubuntu Refuses to Change Backlight Brightness

I've attempted to change the Backlight Brightness, by both the keyboard setting and directly in the screen settings. Both show that I've changed the brightness down to minimum neither actually changed ...
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0answers
339 views

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 ...
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1answer
567 views

Cannot start Wubi 11.10 without “nomodeset”

I am a bit of a Linux noob, so help me out a bit. I installed Ubuntu 11.10 in Wubi on my Acer Aspire 5734z laptop ([specs][1]) and when i boot, i have to use nomodeset by pressing e at bootup, or the ...
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1answer
519 views

WIll 12.04 have a keyboard backlight indicator?

I have a laptop which has a keyboard with a backlight. This works fine, brightness indicator, volume indicator, but nothing appears on for keyboard backlight. Will 12.04 eventually have a keyboard ...
1
vote
1answer
887 views

Attempting to change Keyboard Backlight levels changes theme

I'm using an Asus G74SX on Ubuntu 12.04. When I try to change my Keyboard Backlight levels my theme seems to change or crash to a backup. P.S. My Screen Brightness won't change if I use the keys or ...
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5answers
6k 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 ...
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votes
9answers
4k views

How to increase brightness in smaller steps?

Is there a way to adjust lighting step ? I have Lenovo L520, and Fn + Light Up or Down adjusts by 20%, how can I adjust the step to 10% ? it will help me fine tune lighting at my dark room.
3
votes
0answers
476 views

Switch off laptop backlight when locking screen [duplicate]

Possible Duplicate: How can I disable backlight when I lock the screen? I'm using an IBM Thinkpad t61 and wish to have the backlight switched off when locking the screen.I've been told to ...
11
votes
3answers
10k views

Increase screen idle dim timeout

On Ubuntu 11.10, when on battery, the screen dims after 10 seconds of inactivity. This is annoying because it is too short. Is there anyway to increase this timeout? I know I can disable it, but ...
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4answers
4k 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 ...
1
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1answer
636 views

Netbook running ubuntu 11.10 screen backlight never comes back after it dims [closed]

My netbook running 11.10 ubuntu goes to sleep after 10 minutes of inactivity as per settings. After the screens dims, I cannot get the backlight to come back on. I can see the faint text of the ...
0
votes
1answer
312 views

Backlight keyboard commands working on live CD but not on installed ubuntu

so basically when i put the ubuntu installation disc of Ubuntu 11.10 inside and run a Live session everything works fine (i can press Fn + Arrow Up and Fn + Arrow Down to control the screen ...
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3answers
1k views

Screen brightness not changing on a Packard Bell tx86 [closed]

I'm currently running ubuntu 11.10 on my Packard Bell tx86 when I try and use the fn key to change brightness, the icon thing appears in the top corner of the screen and the bar increases/decreases in ...
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2answers
600 views

Backlight driver /sys/class/backlight has two entries?

System: Dell N4110 Ubuntu ver: Oneric My /sys/class/backlight has two entries acpi_video0 and intel_backlight? Is it normal to have two entries here? When I try to change the screen brightness ...
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1answer
3k 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 ...
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3answers
2k views

Keyboard backlight sensor doesn't work on a Sony Vaio VPCS116FG

I have a VAIO laptop (VPCS116FG, S series). Its keyboard has sensors that can detect how bright the surrounding is, so it automatically turns on the backlight in dark places such as airplane cabins. ...
3
votes
1answer
870 views

Altering the backlight dim timeout on a Thinkpad laptop

It seems something else than gnome-power-manager manages the backlight dim timeout on Thinkpads, maybe thinkpad-acpi. How do you alter the timeout from 5 seconds? (which is very annoying)
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2answers
1k views

How do I re-enable the backlight?

Since Oneiric, if I leave my machine (HP Mini 110 netbook) unattended and it goes into power-save mode, the backlight gets disabled. How can I turn it back on? Note that the keyboard backlight ...
22
votes
5answers
27k views

How do I set default display brightness?

Is it possible to set the default display brightness so you don't have to re-adjust it everytime you reboot? My laptop display is killing my eyes at the login screen already because it starts at 100% ...
0
votes
2answers
801 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 ...
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2answers
3k 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 ...
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vote
1answer
950 views

Backlight no longer works on upgrade from Ubuntu 10.10 to 11.04

I think something changed in maybe the Linux core which has broken Ubuntu and practically every other Linux install on my laptop. The problem is that suddenly the back-light doesn't work when I run ...
5
votes
5answers
7k views

Backlight can't be turn on in Acer Aspire 4736

When I booted up my newly installed Ubuntu 11.04, I discovered, to my dismay, that the backlight was off by default. The keyboard shortcut (which is Fn+F6 on my Acer Aspire 4736) for turning on the ...
3
votes
5answers
2k views

Trigger Screensaver/Off monitor

IS it possible to somehow trigger screensaver or make the monitor sleep/off? I want to disable screensaver/monitor sleep as it gets annoying at times, however I still want a way to save power via such ...
3
votes
1answer
762 views

Can't change Backlight brightness in Asus ul20A [closed]

I have Asus ul20A and what I think is the newest netbook version of Ubuntu, and I can't seem to find a way to change my screen's brightness. It's a shame, because it takes hours off my battery life. ...
2
votes
1answer
1k views

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 ...
4
votes
1answer
727 views

Monitor turns off when I unplug from AC power, how do I stop this?

I'm running natty on a 13" macbook pro, and when I unplug the AC power sometimes, the monitor turns off. Sometimes I can unplug the AC adapter and nothing happens, but as soon as it starts happening ...
7
votes
1answer
8k views

How to stop gnome-power-manager from changing the global backlight setting?

After installing Ubuntu on my ThinkPad T510, the GDM screen and GNOME session would always start at 100% brightness. I quickly found out, that this can be controlled via gnome-power-preferences, but ...
2
votes
3answers
1k views

Turning off the backlight on the console [closed]

I'm using an IBM Thinkpad X21 as a 3G router. It's running a server install of lucid. The laptop has the lid up most of the time. There is no X, just a plain console. The colsole blanks itself, but ...