Questions related to screen brightness.

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8
votes
1answer
777 views

Display problem when adjusting brightness in ubuntu 12.04

Recently I installed Ubuntu 12.04 on my Dell 1554 laptop. I was adjusting my screen brightness when this happened : this has become a recurring problem which is really annoying. I also want to ...
7
votes
1answer
200 views

“monitor brightness down” key resets brightness before lowering it

My monitor brightness down key resets my brightness before lowering it, effectively leaving me at near max brightness. I do not experience any problems with the brightness up key. I'm using a Dell ...
5
votes
1answer
226 views

Can't change brightness after disconnecting second monitor

When I boot up with 2 monitors, or when I connect the second monitor to my laptop, I can change brightness of the laptop screen in the usual sense. After disconnecting the second monitor, when I ...
5
votes
1answer
948 views

How to increase the screen brightness control sensitivity?

In Ubuntu 13.04, when I use the keyboard hotkeys to control my screen brightness, I only get 5 steps to go from the darkest to the brightest level, for a total of 6 levels. However, I noticed a ...
5
votes
1answer
225 views

Brightness resets to zero on an HP dm4 Pavilion

Everytime I reboot my HP dm4 Pavillion the brightness is zero on my screen. BTW I use a Ubuntu 12.04..
4
votes
1answer
433 views

Unable to change screen brightness with hotkeys on Ubuntu 14.10

Just upgraded to Ubuntu 14.10, and now my brightness keys aren't working. Is there a fix for this? I suspect that Linux kernel 3.16 is the culprit...
4
votes
1answer
519 views

Ubuntu 14.04 locks screen without dimming during fullscreen video playing?

I upgraded from 13.10 to 14.04 yesterday, and it appears that something has changed concerning how screen dimming works during fullscreen video playback. This problem does not occur during video ...
4
votes
1answer
2k views

Specific function keys not working

My Toshiba C800 laptop (12.04 LTS desktop) has special function keys as follows: fn + : F2 -> BRIGHTNESS DOWN F3 -> BRIGHTNESS UP F4 -> DISPLAY SELECT F5 -> TOUCH PAD on/off F6 -> PREVIOUS ...
4
votes
1answer
785 views

Remap function keys to commands?

I'm running Ubuntu 12.04 on a Samsung Series 9 (900X3A-A03), and changing the brightness through the function keys or the brightness control UI causes flickering and general instability, so I have a ...
3
votes
1answer
449 views

Ubuntu 15.04 brightness doesn't work

brightness on my Lenovo-IdeaPad-P400-touch graphic Intel® Ivybridge Mobile os type 64-bit Ubuntu 15.04 doesn't increase or decrease after updating from 14.04 please help!!!
3
votes
1answer
102 views

Brightness is reset to Maximum on every Restart in Ubuntu 13.10

I have upgraded from 13.04 to 13.10. After every reboot the brightness is set to maximum. Is there any solution?
3
votes
1answer
1k views

I can't modify the screen brightness on Xubuntu 13.10

I got this problem with brightness on my fresh xubuntu 13.10 install.. It ain't inc/decrease the screen brightness when pressing Fn+F5/F6 !! I've tried some solutions like setting these values in ...
2
votes
1answer
912 views

Display brightness problem on ThinkPad X1 Carbon 2015 (3rd Gen)

I now obtained brandnew ThinkPad X1 Carbon 2015 (3rd Gen) (20BS). Almost of setup has been done, but one problem remaining. Display brightness. << What I had done >> Reference pages are Lenovo ...
2
votes
1answer
73 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 ...
2
votes
1answer
95 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 ...
2
votes
1answer
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 ...
2
votes
1answer
1k 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 ...
2
votes
1answer
312 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 ...
2
votes
1answer
604 views

Toshiba Satellite L645D screen brightness does not work onUbuntu 12.04

I've installed Ubuntu 12.04 on my Toshiba Satellite L645D and the screen brightness does not work, any suggestions??? please help!!
2
votes
1answer
2k views

How do I get brightness controls working properly on an Eee PC 1001P?

Is there a solution to the low screen brightness issue with the Eee PC 1001P and release 12.04? When I use the brightness control, the screen goes through three adjustment cycles of dark to semi ...
2
votes
1answer
756 views

Screen brightness in Ubuntu not working

Hardware: HP DVD6t, AMD Radeon 6700 OS: Natty 32-bit. I have researched a lot on this and basically most of the solutions that are on the internet / stackexchange revolves around the brightness ...
1
vote
1answer
3k views

Message {1.079026} ACPI PCC probe failed; starting version 219

I am running Ubuntu 15.04 (Vivid Vervet) with 3.19.5-031905-generic #201504211114 kernel and GNOME Shell 3.14.4 on a Samsung NP370R4E laptop. When I boot up, I see [1.079026] ACPI PCC probe failed ...
1
vote
1answer
189 views

Brightness control (Fn+ …) not working on Ubuntu 14.04 Asus Q502LA

I installed the Ubuntu 14.04 on Asus Q502LA laptop. Most of the things work fine, but brightness control does not work. First, everytime on reboot, the brightness resets to 100% brightness. Second, ...
1
vote
1answer
252 views

Lubuntu Display brightness

Just installed Lubuntu 14.10 on my machine. I cannot change the display brightness. I have a slider in my power settings but it does nothing. Cannot post screenshot of the slider because of no rep ...
1
vote
1answer
275 views

Some Fn Keys not working after BIOS upgrade (ASUS X401U)

Before upgrading BIOS from version 204, all Fn Keys were working properly. After successful upgrade via EasyFlash to version 313 of my ASUS X401U some Fn keys are not working anymore which are: Fn + ...
1
vote
1answer
570 views

Why is Ubuntu 14.04 running slow on my Asus Zenbook UX302 LG? + brightness issue

It's a fresh install alongside Windows 8.1. I have already tried to modify the grub file by adding acpi=off but it doesn't speed up things. The machine has an i7-4500U processor, 8 GB of RAM and ...
1
vote
1answer
431 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 ...
1
vote
1answer
525 views

fglrx: dim screen until brightness key pressed

I reported this at https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1360218 three weeks ago but it is still unassigned and no one has commented on it but myself. It is a Lenovo G50-45 ...
1
vote
1answer
153 views

Can't adjust screen brightness ((

Can't adjust screen brightness from anywhere. Nor by specific buttons on the laptop keyboard, nor by setting in "brightness and lock" I've tried to configure the grub file like it mentioned in a lot ...
1
vote
1answer
561 views

Any way to enable dynamic/automatic brightness adjustment?

My Lenovo ThinkPad X201 Tablet has a very bright screen (400 nits!), which is good for when objects on the screen are dark (say a night scene in a movie), but it is of course very blinding when ...
1
vote
1answer
552 views

Ubuntu 14.04LTS hangs when i change brightness of my display on Dell N5010 laptop

I have dell n5010 my system hang when I try to change brightness of the display and this happen only when my system on battery please help how to solve this problem
1
vote
1answer
86 views

Change the default screen brighthness

Hi im using Xubuntu 14.04 with linux 3.13.0-24 every time my screen goes dark ( activating the screen saver or so ) my current screen brightness is set to some default value how can I change ...
1
vote
1answer
69 views

Can't connect to WiFi and adjust brightness after crash

Disclaimer: I'm pretty new to Ubuntu; Lenovo G505s; Ubuntu 13.10 I was doing an update via the Software Updater when suddenly my laptop just hangs. I had to force shutdown (holding the power button). ...
1
vote
1answer
159 views

How to retain LCD brightness after reboot

I frequently test different linux Distros and recently found a 'feature' that I would like to know how to turn on in Ubuntu. In my testing of Fedora 20 I noticed that it retained the LCD brightness ...
1
vote
1answer
678 views

How do I adjust screen brightness / backight on a Toshiba Satellite C50D?

I know this is a known bug, it been asked and answered thousands of times before. I've spent the past couple of months searching for a solution and all have failed. My Fn keys won't adjust brightness ...
1
vote
1answer
212 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 ...
1
vote
1answer
291 views

How to enable notifications while changing brightness and/or volume?

I'm using Ubuntu Gnome 13.10 (Gnome Shell 3.8). When I change the volume or brightness via hotkeys or my volume +/- buttons on my keyboard I do not get the notification in the middle of the screen. ...
1
vote
1answer
132 views

Setting which brightness determines screen brightness

I'm having an issue running Kubuntu 13.04 with brightness, something that seems common. In particular, brightness can be found in these 2 directories: /sys/class/backlight/acpi_video0/brightness ...
1
vote
1answer
296 views

Screen Dimmer in Ubuntu than in Windows - Haswell NEC Lavie

I just bought a new laptop, on which I immediately installed Ubuntu 13.10. Pretty much everything worked out of the box, except the screen brightness. The maximum brightness in Ubuntu is much lower ...
1
vote
1answer
998 views

Unable to change display brightness with Function keys or Brightness and Lock application in Ubuntu 13.10

I am having problem with Ubuntu 13.10 brightness control. My brightness shortcut keys (Fn + F5/F6) worked in 12.10 and 13.04 but they have stopped working in 13.10. I am using Sony Vaio SVE15113ENB ...
1
vote
1answer
225 views

Full brightness and keyboard backligh at boot

I own an Asus N56VZ, and each time I start Ubuntu (13.10 and prior versions) my screen brightness and keyboard backlights reset their values to the max. Ubuntu doesn't save my settings on reboot. I ...
1
vote
1answer
852 views

Brightness function keys not working in 12.04.3 LTS?

I'm running Ubuntu 12.04.3 LTS (info from cat /etc/issue/) on an Asus X401A Kernel is: 3.8.0-31-generic I've tried changing the /etc/default/grub file with the following: ...
0
votes
0answers
93 views

Control brightness on Satellite Pro C845

I have a Toshiba Satellite Pro C845 con Intel Core i5 and I can use the function keys to mute sound or increase and decrease, but the brightnes keys does not work, to decrease is fn + f2 and to ...
0
votes
0answers
129 views

Screen Resolution for 14.04 + display lists only 1024x768

I am using Ubuntu 14.04 on dell 1749 laptop, do not know what happened and I am not able to control brightness, and I can not in choose other resolutions than 1024x768. Processor: i3 RAM: 6GB OS ...
0
votes
0answers
59 views

Set Brightness to 0 when lid closes

is there a way of setting the brightness level to 0 or blanking the screen when I close my lid (without suspending the system). I just prefer it that way, since I listen to audiobooks while driving ...
0
votes
0answers
156 views

Ubuntu 14.04 LTS Screen Brightness ASUS G750JS

I got a new ASUS G750JS at the beginning of the summer and set it up for a Windows 8.1 / Ubuntu 14.04 LTS dual boot. Minus discovering that the Windows 8 boot manager is completely broken, I had ...
0
votes
0answers
77 views

Ubuntu 14.04 max brightness isn't the max brightness

I am experiencing an issue with the brightness on my laptop (Sony Vaio vpcf21z1e). This issue has been occurring since Ubuntu 12.04. Essentially when my laptop boots into Ubuntu the brightness is set ...
0
votes
0answers
182 views

Sony Vaio SVE15113ENB brightness Fn key slider issue -Ubuntu 14.04 LTS

I am using a Sony Vaio SVE15113EN laptop. Recently I installed Ubuntu 14.04 and found out that I am unable to adjust my display brightness slider. The brightness is so high that I am unable to use the ...
0
votes
0answers
33 views

Brightness keys registering, but no effect

I have (very) recently installed Ubuntu, and am having some issues with the brightness. I'm using an HP ProBook - the brightness keys are being registered no problem, and when I go into Brightness ...
0
votes
0answers
969 views

Brightness control not working Aspire 4352-2852 Ubuntu 14.04 LTS

I'm a newbie in Ubuntu and so far it has worked really good, but there is one small problem, I can't control the brightness. The brightness control shows on the screen but it doesn't change anything, ...