Questions related to screen brightness.

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3
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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 ...
3
votes
0answers
490 views

Ubuntu 15.04 - Dual monitor problems

I installed Ubuntu 15.04 and I have problem with my 2 monitors. I was googling so long time and didn't find any working solution for this. 1) I need to set my left monitor primary before login screen,...
3
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0answers
170 views

How to link brightness button to correct brightness script

I recently upgrade my Ubuntu from 12.04 to 14.04. My laptop has always had incomtibility issues between the brightness button and the actual brightness set up. In 12.04 I had fixed the problem by ...
3
votes
0answers
601 views

Screen brightness issue Toshiba Portégé after 15.04 upgrade

I have a Toshiba Portégé Z30-A-13P. I can no longer adjust my screen brightness after upgrading Ubuntu to version 15.04 (Kernel 3.19). The screen brightness (as well as the touch-pad) didn't work ...
3
votes
0answers
325 views

How do I stop the lock screen from dimming to black?

I've spent a ton of time searching for this on Google, and I still can't seem to find it. Please read fully before answering, because the majority of the answers I'm finding are about preventing ...
3
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0answers
2k views

Can't change screen brightness running Ubuntu 14.04LTS on Samsung NP510R5E

FIXED! After DBANing my hard drive I installed Ubuntu 14.04LTS and quickly realised I've been unable to change screen brightness. This isn't too much of an issue when AC power is plugged in as the ...
3
votes
0answers
2k views

How to disable automatic brightness adjustment in Ubuntu 14.04?

I am running Ubuntu 14.04 LTS on a Dell 3542 laptop. My problem is that screen brightness changes depending on content. I think this is called automatic (or dynamic) brightness adjustment, as I stated ...
3
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0answers
572 views

Ubuntu 14.04 + Bumblebee, Unable to control Brightness and have Bumblebee working at the same time

I'm current running Ubuntu 14.04 with a GTX 780m gpu on my laptop and using nvidia-331 drivers with bumblebee. I was unable to control the brightness of my screen, but then I decided to follow some ...
3
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0answers
457 views

Fn key combination *suddenly* stopped working for brightness only

I've looked at most of the questions relating to enabling hardware brightness control under Ubuntu with the Acer Aspire S3 laptop; initially these fixes worked, under the initially installed kernel 3....
3
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0answers
387 views

Laptop brightness keys have a delayed effect or none

My laptop is a Gateway NV52L03H, Amd Radeon HD 7520G using the AMD FGLRX drivers. Most of my laptop's Fn (function) keys are working properly and as they should. The only one misbehaving are the ...
3
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0answers
672 views

Is it possible to change a laptop's screen-dimming capabilities?

My laptop is able to dim it's screen automatically until it is turned off by Ubuntu to save power, currently my dim screen button doesn't let me turn off my screen completely, my questions are: Is ...
2
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0answers
242 views

I can't lower the backlight/brightness

Why I can't control the brightness/backlight level? At the first: Notebook Positivo BGH - C500 Series. Processor: AMD C60 series (dual core 800 mhz-1ghz) GPU: Radeon HD 6290 (worked with fglrx/...
2
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0answers
50 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 ...
2
votes
0answers
92 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-...
2
votes
0answers
101 views

Can't change brightness using DDControl with Catalyst driver

I have a Samsung SyncMaster SA100. This monitor doesn't come with buttons to change the brightness, only a power button. The guys at Samsung say that you should change the brightness using a ...
2
votes
0answers
27 views

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 ...
2
votes
0answers
578 views

Xubuntu 15.04 black screen after screen lock

I am using Xubuntu 15.04 with Xfce 4.12 in a Dell Inspiron 14 laptop, model 3442. Whenever I lock my screen, then put my password and unlock it, the screen brightness gets very low, it's almost as if ...
2
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0answers
196 views

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 ...
2
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0answers
328 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 ...
2
votes
0answers
342 views

gcm-calibrate without hardware sensor

My monitor won't allow me to set the contrast when using DVI. And ubuntu/gnome won't allow me to set it via software without some fancy color calibration sensor. on system settings > color the "...
2
votes
0answers
269 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 ...
2
votes
0answers
690 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 and I can't ...
2
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0answers
1k 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 ...
2
votes
0answers
620 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=...
2
votes
0answers
67 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 ...
2
votes
0answers
1k 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 ...
2
votes
0answers
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/...
2
votes
0answers
222 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 ...
2
votes
0answers
460 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 ...
2
votes
0answers
479 views

How to adjust brightness in games with Radeon driver?

I recently installed Lubuntu 12.10 on an older laptop, an HP Pavilion zv6000. It runs GREAT with one exception. I am unable to adjust the brightness in any games. I realize I am stuck using the open ...
2
votes
0answers
206 views

Bright/Dim Controls Wont Work In 12.04

I have a gateway nv54, and the controls wont work to brighten or dim the screen. The only way it does is if you change it to the setting you want, then restart the computer. Any suggestions/drivers ...
1
vote
0answers
35 views

thinkpad_acpi disabling brightness events

After installing routine updates, my keyboard brightness controls, wireless on/off, and other controls have stopped working. Interestingly, the 'lock' key still works. I have looked at a few other ...
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0answers
57 views

Adjusting brightness to my laptop

I try through System Settings to change the brightness of my screen, but nothing happens. I also tried to follow this answer how to adjust screen brightness in ubuntu 14.04?. But I think that the ...
1
vote
0answers
102 views

Fn+F5/6 Brightness shortcut not working - Asus laptop - Ubuntu 14.04

I have been bothered for a while with this bug of the Fonction key, it works for sound (Fn+F12/11/10) or turn on/off the screen (Fn+F7), but not to adjust the brightness (Fn+F6/5)... After some times ...
1
vote
0answers
81 views

Brightness Fn key slow to change N3700 ( I've tried everything! )

I have an Acer R3-131T with the new Broadwell Intel Pentium N3700. My brightness works if it is adjusted in the system settings but when I use the combo "fn+brightness key (in this laptop are the ...
1
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0answers
25 views

External monitor and colour adjustment on ThinkPad T440p

I'm new to Linux, and have sorted out inital issues with two exceptions. One is that my ThinkPad doesn't detect my Benq external monitor, either via VGA or miniDSP-to-HDMI. System settings > Displays >...
1
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0answers
60 views

xbacklight and xdotool do not work on desktop Ubuntu 14.04

I have Ubuntu 14.04.3 LTS on a desktop. I tried the following and none of them worked: $ xbacklight -dec 10 $ xdotool key "alt+r" XF86MonBrightnessDown $ echo 400 | sudo tee /sys/class/backlight/...
1
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0answers
75 views

Brightness at minimum after opening closed lid Macbook Air 7,2 (13'', Early 2015)

I hope someone could help me to solve my problem. Today I installed Ubuntu GNOME 15.10 on my Macbook Air 7,2 (yes I know macbooks aren't the best choice but it was a present) and know I'm having the ...
1
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0answers
23 views

My brightness key is lagging severely and sometimes doesn't work at all on 14.04 LTS (HP Stream 11)

This is what happens when I try to lower the brightness - https://www.youtube.com/watch?v=z5HEVHx7roQ. When I start up my laptop, it dims the brightness and I can't see some of the screen with the ...
1
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0answers
12 views

Is there a way to tie the brightness levels of each monitor together?

I have two monitors, one external, one part of my laptop. In order to set the brightness on my external monitor I have to use this answer. But I really just want to be able to hit the button on my ...
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0answers
22 views

How to set brightness to my Last set level?

I have read a lot of Q&A to set brightness to a fixed level on startup. But that is not what I want. I want that script (/etc/rc.local ) to update itself dynamically. i.e, On every startup ...
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0answers
613 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 ...
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0answers
100 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 ...
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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 ...
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0answers
39 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 ...
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vote
0answers
44 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 ...
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vote
0answers
28 views

Why don't remember brightness (U14.04, Samsung Ativ book 9 lite)

Why Ubuntu doesn't remember the screen brightness ? Whenever I turn it on, it always returns to the max, even if I set on settings. Thanks in advance
1
vote
0answers
43 views

Event handler even more low-level than acpid?

Ubuntu 14.04 Netboot didn't support my laptop's display brightness controls out of the box. So first thing I did was fire up evtest to check if the correct keycodes (KEY_BRIGHTNESSUP and ...
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0answers
59 views

Editing system settings not working

So this happened after I tried to plug an external monitor into a 10,1 Macbook Pro running Ubuntu 14.04 64-bit. I first started playing with nvidia-settings without success and then I tried to ...
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0answers
73 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 ...