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Questions related to screen brightness.

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3
votes
0answers
398 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 ...
1
vote
0answers
32 views

Ubuntu 12.04.3 LTS retaining screen brightness

Is it possible that Ubuntu retains screen brightness settings used in the previous session after the computer is turned off. If so how can I achieve this effect?
0
votes
1answer
50 views

Ubuntu 12.04 in a 2 months old Toshiba Satellite

I installed Ubuntu 12.04 in a 2 months old Toshiba Satellite C75 AMD A6-5200 APU with Radeon(TM) HD Graphics × 4 and 4gigs of ram. It doesn't detect my laptop internal wireless card only my external ...
0
votes
2answers
5k views

How should I control the brightness on my Ubuntu 14.04 system? [duplicate]

Brightness control button is changing brightness value in file /sys/class/backlight/acpi_video0/brightness, but screen brightness is not changing.
1
vote
1answer
1k views

Toshiba Satellite P850 FN-Keys not working

I could solve several other issues with my laptop thanks to this forum. The only thing I can't figure out is the non working FN-Keys for the brightness. Volume control is fine. Two things I found out ...
0
votes
0answers
137 views

How do I un-dim my computer screen after I close the lid in xubuntu?

I have recently installed xubuntu on top of normal ubuntu on my computer. A problem that is really bugging me is that whenever I close the lid on my computer, it will go to sleep, as usual, but when I ...
0
votes
0answers
47 views

Brightness doesn't change in sony vaio

I am using sony vaio with ubuntu 12.10 in dual boot with windows 7 and AMD RADEON graphic card. Brightness settings are not working in ubuntu and it is releasing lots of heat. Please help me how to ...
3
votes
1answer
3k views

Ubuntu 14.04 - brightness problem in HP hybrid laptop

In a HP sleekbook 15 laptop I managed to install NVidia driver and also quick switch graphics is working. When NVidia card is active I can adjust the brightness using keyboard but when intel card is ...
3
votes
6answers
20k views

Make xconf configuration permanent

I edited the xconf file, and added this line to device section: Enable brightness control=1 Now I am able to adjust brightness, but after every restart the brightness setting change back to 100%. ...
0
votes
0answers
265 views

AMD screen-brightness adjustment issue with Trusty Tahr

I upgraded to 14.04 just today and since I'm now using kernel v3.13 and according to This link, I should now be having better support for AMD grapahics. Is it possible to fix the screen-brightness ...
2
votes
0answers
941 views

Settings for display brightness not saved in Ubuntu 14.04 [closed]

I have bought HP ENVY 15t laptop and installed Ubuntu 13.10 on it. The first annoying thing I faced with was restoring brightness settings to 100% after reboot. So I had to adjust it every time I ...
0
votes
0answers
59 views

fglrx brightness and black screen

In a HP 2000 Notebook PC and ubuntu 13.10, when I change the radeon driver for the fglrx, glxgears show more fps, but any brightness change make a black screen for one second. With the radeon driver ...
0
votes
0answers
32 views

Different problems with my 13.10 system

Hello guys, I'm a real newbie in using ubuntu, but I really, really like it. I'm facing 2 different and annoying problems tough, so I hope you guys can help me out with this. First Problem: I have ...
1
vote
0answers
64 views

How can I adjust the brightness on an HP Envy dv7?

I have an HP ENVY dv7. When I was running Windows 8, I could tweak the brightness to my heart's content. Now, I'm limited to only the first five clicks on the brightness bar. After that, same max ...
1
vote
0answers
60 views

How to decrease step of XF86KbdBrightnessDown and XF86KbdBrightnessUp handlers on Ubuntu

My hardware supports full 256 steps of screen brightness. Unfortunately Ubuntu's default brightness driver uses wrong steps: I need to increase granularity of steps in the dark end of the spectrum, ...
1
vote
0answers
32 views

Can't change brightness when installing

I'm kind of newbie in ubuntu. After several hours of research and trail, I finally managed to boot into Ubuntu installation screen via USB. However, my screen brightness is really really dim, I can ...
1
vote
1answer
50 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). ...
0
votes
0answers
37 views

Grub changed brightness but after pressing brightness button return dark

My laptop is Lenovo K49. It's dark so every time I need to change brightness manually. Later I found a solution by changing the brightness as below: sudo gedit "/etc/default/grub" And change the ...
0
votes
1answer
178 views

Why I cannot use the Fn + (up) to control the brightness?

I have a Lenovo zhaoyang K27 with Intel® HD Graphics 3000. Since I installed Ubuntu for the first time, about two years ago, I haven't been able to change the brightness by Fn+^. I found a solution in ...
7
votes
1answer
488 views

Stop Screen Dimming After 60 Seconds (MacBook running 12.04)

I'm running Ubuntu 12.04 on a MacBook air - everything works fine, apart from the fact that the screen dims after 60 seconds of activity. Is there any way to stop this? My computer is on mains ...
0
votes
0answers
51 views

Brightness resets when lid is closed and opened.

So my brightness with the slider in settings wasn't working before I edited in /etc/default/grub this GRUB_CMDLINE_LINUX="" to this GRUB_CMDLINE_LINUX="quiet splash acpi_osi=Linux ...
0
votes
2answers
126 views

How to adjust brightness vaio nr21s ubuntu 13.10?

I installed Ubuntu 13.10 on my Vaio nr21s but cannot adjust brightness levels. The fn keys work, but they don't change a thing, brightness remains at max level. Thought I should choose a repository ...
0
votes
0answers
171 views

Unable to control brightness, ASUS F551MA/Intel HD

I am unable to control my screen brightness on my new ASUS F551MA with only ubuntu 12.04 installed. It has Intel HD graphics. I can't control my brightness nor with FN+F5/F6 nor with ...
0
votes
0answers
113 views

Changing Brightness Xubuntu [13.10]

I cannot change the screen brightness on Xubuntu 13.10. I am running a Toshiba Satellite Laptop, using the proprietary fglrx AMD drivers, and have tried the acpi_vender etc. kernel parameters (do not ...
1
vote
1answer
120 views

Ubuntu boots up with full brightness [duplicate]

I have installed Ubuntu 13.10 in my samsung laptop,everytime i boot up the system it starts with full screen brightness which is quite annoying in the night. Is there a way to fix this problem so ...
0
votes
1answer
46 views

Brightness problem in Ubuntu 12.04 Precise Pangolin

I own a ACER ASPIRE5734Z that has a Pentium(R) Dual-Core CPU T4500 @ 2.30GHz × 2. I tried this solution,but did not work out: Open terminal ( Ctrl+Alt+T ) and type: sudo gedit /etc/default/grub ...
0
votes
0answers
37 views

is there any option to set brightness permanently in ubuntu desktop GUI ?

I have changed the brightness level permanently using terminal. temporarily we can change the brightness in GUI. but for permanently setting it, Is there any option in GUI mode? if not why such a ...
0
votes
0answers
127 views

Brightness Issues on HP Pavilion 15-n042se Notebook PC

I have installed Ubuntu 12.04 LTS, I found that I can't control the display brightness with the hotkeys (F2 and F3) or even from GUI (Brightness and lock screen), I don't have any control on the ...
0
votes
0answers
310 views

Can't adjust screen brightness on lenova y410p

Can't adjust screen brightness on lenova y410p. I'm running unbutu 13.10. I tried different answers on here but nothing seems to work. I changed GRUB_CMDLINE_LINUX in /etc/default/grub to include ...
1
vote
0answers
85 views

fn + Up and fn + Down both increase brightness, notification not showing when doing so(Lenovo z570)

When I installed Ubuntu on my Lenovo z570, with Ubuntu 13.10 I couldn't manage to get the brightness to change. I read some of the solution to similar problems people had and I played around with ...
0
votes
1answer
85 views

Dell laptop screen brightness is not working after upgrade from 12.04 to 13.10

I tried with GRUB_CMLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" and sudo update-grub but did not worked.Please help me out
0
votes
1answer
263 views

Brightness function keys problem

I have an HP 650 notebook, and I just finished installing ubuntu 13.10 . The problem is that brightness function keys don't work ( f2 and f3 ). I tried changing GRUB_CMDLINE_LINUX_DEFAULT and updating ...
0
votes
0answers
178 views

Adjust screen brightness in Ubuntu 12.04 LTS (Packard Bell Easynote R4622 laptop)

I have a Packard Bell R4622 laptop running Ubuntu 12.04 LTS 32 bit. I turned the brightness down with the function keys because the screen was too bright, but now it is too dark and I cannot turn it ...
2
votes
2answers
189 views

Unable to change brightness using keys after recent 13.10 update

I have been using Ubuntu 13.10 for months now without too many hassles. But a couple of days back, my system offered to install this major update and of the many things that have gone wrong, the most ...
0
votes
0answers
173 views

My Laptop Not Charging And Brightness Keys Not Working After Installing Ubuntu 12.04.3 LTS

I have Lenovo(G-505s) Laptop with per-installed windows 8. Recently I'm installed Ubuntu 12.04 through CD. But after installing my laptop battery not charging and my brightness keys not working in ...
1
vote
2answers
211 views

Why is my Laptop Brightness reset to minimum after every restart?

I have an Acer Aspire 6930G with an Nvidia 9600MGS and Ubuntu 12.04 LTS. Every time I turn off my computer and then turn it back on the brightness is always set back at the lowest possible level. I ...
0
votes
0answers
332 views

Xubuntu Brightness not working

I am trying to gain the ability to change the brightness on my Toshiba Satellite laptop running Xubuntu. I have xbacklight, and am running xfce4-power-manager with the --no-daemon flag. It's not ...
1
vote
0answers
13 views

Screen brightness reset to minimum after every reboot on HP Pavilon DV4. HELP [duplicate]

Ubuntu 13.10 doesn't save my brightness settings between sessions. Everytime I boot up, the brightness is always at zero, and I always have to set it back to my preferred setting (at maximum). How can ...
2
votes
0answers
56 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 ...
0
votes
0answers
105 views

Ubuntu 13.10 on Dell Inspirion N5010: Problems with Bluetooth and brightness

I install Ubuntu 13.10 64bit on my Dell N5010 laptop and I have also installed proprietary drivers for my ATI Radeon HD5650 and wireless card. I have noticed that Ubuntu didn't recognized my ...
0
votes
0answers
51 views

Blackscreen like DOS after press F5

This is the first time I use Ubuntu. (Actually, I've used Ubuntu 10.10 before, but now I'm going back to Ubuntu because my Windows encounters bugs and isn't stable) My trouble here with my Dell 14R ...
1
vote
1answer
133 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 ...
0
votes
1answer
143 views

Brightness in ubuntu 12.04

Well this is a common problem as i have seen through my google searches but i didn't manage to find any satisfactory solution so far. I got my laptop recently which came with windows 8 pre-installed.I ...
0
votes
2answers
474 views

No brightness control in Ubuntu 12.04, Lenovo V570 [duplicate]

I have been struggling now for an inordinate amount of time trying to get the brightness adjustment working in Ubuntu. I am running Ubuntu 12.04 on a Lenovo V570 Laptop. I have tried all of the ...
0
votes
0answers
20 views

Trying to install and keeps going to white screen

I downloaded Ubuntu on my computer so that I could burn it to a DVD-r disc, and now I am trying to put it on my daughter's laptop (her computer crashed). The Ubuntu purple screen showed up, then a ...
0
votes
0answers
15 views

Why am I not able to lower my screen brightness? [duplicate]

I modified the brightness in the brightness settings and locked it but the brightness in the screen did not change. I have ubuntu 13.10, but with previous versions you could not change, my computer ...
0
votes
1answer
231 views

Dell Inspiron 14r Display Problem- Tried Everything

I know there are a million posts about this, but I have been on this forum for hours and haven't found a solution to my problem. Like many people, my brightness keys don't work and I am looking for a ...
2
votes
1answer
132 views

Brightness stuck at full after suspend HP Pavilion G6 12.04

I have an ongoing problem with my linux install where brightness seems to get stuck at full after my laptop suspends. Before suspend, the hotkeys work fine. After suspend the hotkeys still bring up ...
0
votes
0answers
136 views

Various troubles with Ubuntu 12.04 LTS (Toshiba Satellite)

I installed Ubuntu 12.04 LTS on my Toshiba Satellite C660D-1FV a few days ago. Although the OS is updated, I'm experiencing some problems like: When 2 or more applications are simultaneously ...
0
votes
0answers
99 views

Screen Brightness on Acer AspireV: bar appears, brightness doesn't change

Using 12.04 on an Acer Aspire V5-561-9410. When I use the function keys to modify screen brightness (or use any solutions I've found here to this problem like the one found here or here), I see the ...