Fix your laptops brightness function keys operating properly in Hardy
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Before doing any changes you need to take backup of existing files
Now you need to download the following files in /etc/acpi/ directory
Download video_brightnessup.sh from here
Download video_brightnessdown.sh from here
After replacing these scripts
No reboot or logout required, simply press your function combination on your laptop to change brightness. Try to press FN + Up/Down Arrow.
Credit goes to AaronMT
Actually, I don’t have any problems with my function keys on my DeLL Inspiron 1420.
All keys were functional from the moment I’ve installed Hardy.
hello, i have a SONY vaio VGN-FZ21E and to adjust the brightness i use the keys Fn + F5 (less brightness) and Fn + F6 (more brightness) but in Ubuntu Hardy Heron i can’t adjust the brightness and this fix do not result in my laptop, can you help?
My Fujitsu Lifebook has problem with brightness function keys and this fix also does not fix the problem. The function keys work correctly in Windows.
Hello João! Tell me please. The Web-camera works for you?
I just wrote a tool in C to do this same task. DOH!
@Greg
Is it possible to share with us or you can submit as article to ubuntugeek
Thanks
For those of you who had tried this tip but didn’t work, let me share my experience (on HP Compaq Presario V3000).
First, type this command:
>> cat /proc/acpi/video/VGA/LCD/brightness
which will show on the screen something like this:
levels: 100 60 20 28 36 44 52 60 68 76 84 93 100
current: 100
Then change the brightness values in video_brightnessup.sh and video_brightnessdown.sh to match the values shown after the word ‘levels’ above.
Also, don’t forget to set the file permissions of video_brightnessup.sh and video_brightnessdown.sh so that they become executable.
Hope this works for you too!
All,
I have the same problem on my Fujitsu Amilo 2515 laptop. It looks to me as though the video_brightnessup & down scripts are not being called at all.
Anyway, as a quick workaround use the following script from a terminal window:
—————-
#!/bin/sh
if [ $# = 0 ]
then
bval=75
else
bval=$1
fi
echo ${bval} > /proc/acpi/video/GFX0/DD02/brightness
————
On my machine, valid values for brightness are: 13, 25, 38, 50, 63, 75, 88 , 100
If you invoke the script without a value, the brightness will be set to 75% which I find adequate for most environments.
The script needs to be edited depending on the notebook being used. Not all monitors accept the same values for brightness. Mine are:
95 43 20 24 28 32 37 43 50 59 69 81 95
Also, most people will probably not know that they have to make the scripts executable with:
sudo chmod a+x /etc/acpi/video_bright*
Otherwise it will definitely not work.
hello everybody,
i have these function-keys problem, too. what i tried out is the follwing:
– edited the video_brightnessdown.sh and video_brightnessup.sh files
– filled with the values from /proc/acpi/video/NVID/LCD/brightness
– set the attributes to execute
then i tested the settings, and it stilld doesn’t work.
i found out that, when i am pressing the function-keys it affects the brighness-file (checked the current-value)
but the display is at maximum brightness and the current-values says: it is at 10! evertime i push the change-buttons the current-value changes, unfortunately not the real brightness of the display.
using the function-keys in a textconsole (STRG+ALT+F1) works.
is there any solution to this? or did i forgot anything?
please go here http://ubuntuforums.org/showthread.php?t=673946
it solved mine.
Hey, I just wanted to thank you for saving my eyes, as I could feel them breaking as I scoured the internet for a fix with an incredibly dim screen. Thanks for the fix (for others wondering if this will work for them, it helped Hardy Heron make the brightness buttons on my HP Pavilion dv6000 work again)
What’s the advantage of this script over using xbacklight?
Hey Peoples,
This fix did not work for me. I am using a Pavilion dv3000 and thought I would give it a good.
Running it from command line results in the following:
grep: /proc/acpi/video/VGA/LCD/brightness: No such file or directory
video_brightnessup.sh: 35: cannot create /proc/acpi/video/VGA/LCD/brightness: Directory nonexistent
Anyone got a working solution for this in Karmic Koala, 9.10?
Hi, I have an Acer aspire 4810T and the brightness can not be changed under Karmic Koala. The function keys are working and the numbers under /proc/acpi/video/OVGA/DD02/brightness are changing accordingly.
But the only thing I see is a bright display.
Update to my earlier comment on Ubuntu 9.10. Using the beta, the brightness controls were DOA, but when I installed all the updates after the final release, the brightness widget suddenly started working on my Vaio Z530N.
I have a Acer Aspire 4736G laptop with Ubuntu 9.10 (Karmic Koala) installed on it. And I have the same problem as cees above. The FN+ combination shows that the brightness is decreased/increased but the screen remains in same brightness. I can change the brightness using the same combination in my Windows. Please suggest a fix for this problem. Is this a problem with not installing Acer drivers or is it a problem with Ubuntu?
Have you tried the brightness applet on the panel too? (You may have to manually add it.) If that doesn’t work, it probably is a driver problem.
how can i change the settigns of the brightness of my laptop for if plug it in the it darkens, while if i’m only using battery it is real bright..
thanks
hai..im using acer aspire 4736 laptop.
im also having the same problem as you guys.
My diplay brightness is not functioning.
My solution is:
—————
1. Install COmpiz (Advanced Desktop Effect Settings (ccsm) from Add/Remove..
2. After finished, go to System > Preferences > CompizConfig Settings Manager.
3. At Accessibility Column, tick the Opacity, Brightness And Saturation and click at the word.
4. There are Opacity| Brightness | Saturation tab. Choose the brightness tab.
5. You will see keyboard(increase),mouse(increase),keyboard(decrease),mouse(decrease) icon at the left. At the right of it, you will see Disable button.
-Brightness Increase-
6. Click at the disable button of keyboard(increase) and tick the enable box.
7. Now, put your own combination. Lets say we want to make it as CTRL + right button. There are a choice:
Shift Super
Ctrl Alt
8. Click at the Grab key combination.
9. ccsm windows will pop up. Press ctrl + right button on your keyboard and press ok..
10. Now you have done for the Brightness increase button.
-Brightness Decrease-
11. Click at the disable button of keyboard(decrease) and tick the enable box.
12. Now, put your own combination. Lets say we want to make it as CTRL + left button. There are a choice:
Shift Super
Ctrl Alt
13. Click at the Grab key combination.
14. ccsm windows will pop up. Press ctrl + left button on your keyboard and press ok..
15. Now you have done for the Brightness decrease button.
-Try it OUT-
Now, go to the desktop and press CTRL + left button on your keyboard repeatedly and CTRL + right repeatedly.
It is working??
Note: this brightness working at all active windows.
try open up mozilla and press the CTRL + left button. Mozilla will get dimmer.
Try open up terminal and do the same things. The terminal will get dimmer to.
press CTRL + right to get it brighter.
Happy playing!!!
thanks man. me too own 4736. i installed MINT .. workin great
hi
I have dell new inspiron R 14 with Ubuntu 10.04 installed. I am not able to control brightness. some one please help.
these solutions here I tried none worked
Thanks
Are you using the brightness applet on the Gnome panel?
I am not aware of Brightness Applet. How do I enable/use this ?
I am able to control brightness from grub menu.!!
Thanks a lot.
Iff you are using Gnome, right-click on the panel you want to add it to, select “Add to Panel”, then drag the Brightness Applet to where you want it on the panel.
I have added the same to panel. But it is saying “Cannot get Laptop Panel Brightness”!
any clue ?
Thanks a lot.
I have tried with new kernel installation. The Display of brightness control is coming when I am pressing keyboard button and the applet is also showing up down controls. But the brightness is constant.
Thanks for any update.
How increase/decrease the brightness in Sony Vaio laptops with Ubuntu 10.10 using Bash.
http://paste.ubuntu.com/518967/
SONY VAIO VGN-NW250T
to adjust brightness on acer aspire, press fn + left arrow key with the sun logo on it, to reduce brightness and the right arrow key to increase brightness.