Ubuntu :: 10.10 - Cannot Control Brightness By Up And Down Keys

May 25, 2011

I am using Samsung N150 and ubuntu 10.10 is installed in it. There is problem with brightness control i.e., I cannot control my brightness by up & down keys. I made settings such as:

I Add the repository to the sources list and enable it
sudo add-apt-repository ppa:voria/ppa
Perform complete system update
sudo apt-get update && sudo apt-get upgrade
it may take long time depending the internet connection
than I installed packages "samsung-backlight" and "easy-slow-down-manager"
sudo apt-get install samsung-backlight easy-slow-down-manager

Also I made changes in brightness setting in during the boot i.e set to user control instead of automatic. But after doing all these stuff still my laptop brightness not control by fn + up/down keys.

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I Install Ubuntu 9.10 and I can't control Brightness, show brightness popup (Fn+F5F6) but screen brightness don't work, I install NVIDIA Driver Linux-x86_64 version 190.53, modiffed xorg.conf.

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Feb 9, 2010

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2) I tried some recommended power management packages (gnome-power-manager) but it doesn't seem to be accessible or functional right now. I don't have any way to control it or get to it that is obvious to me. Is an icon or anything supposed to appear on the task bar when you install or what? Getting some sort of power management on here is important because it gets really lousy battery life otherwise.

3) Being a Macbook, there's no right-click button. Multitouch would be really nice (two-finger scrolling!) but I'd be OK with ANY way to right-click with the touchpad. I have a wireless USB keyboard/mouse combo that works at home at least . . . right out of the box too!

4) I've seen some packages called the Mactel PPA, but they are made for Ubuntu. Since Debian and Ubuntu are so similar, is there any way to make those work on Lenny? I think that if I got those to work, I could fix some of the problems above. Or do I have to install Ubuntu?

5) I just noticed that the sound doesn't seem to work yet either.

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Jul 6, 2010

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Jul 25, 2011

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root@xavierc-lt-xub:~# ls /proc/acpi/
ac_adapter battery button event wakeup
root@xavierc-lt-xub:~#

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Jul 26, 2011

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I've tried writing brightness-up and brightness down scripts along with a bash script but even those don't work. I tried Gnome Power Manager but that didn't solve any issues. The wireless and sound functions work.

Are there any solutions available for this particular laptop model?

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Nov 24, 2015

When I first install debian I couldn't change the screen brightness at all not manually nor with function keys, but I tried some of the solutions I found on the internet and now I can change the brightness manually (from the power management or the battery icon) but when I use the function keys it takes them like 2 to 3 minutes to respond and cause the system to hang (even mouse curser not responding) and then I'm forced to manually reboot the system, here is some information :

Code: Select all$ ls /sys/class/backlight/
acpi_video0  intel_backlight
 
Code: Select all$cat /etc/default/grub
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

[Code] .....

And I've tried this:

Code: Select allsudo -i kwrite /usr/share/X11/xorg.conf.d/20-intel.conf

And I add the following in this file

Code: Select allSection "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"  "intel_backlight"
        BusID       "PCI:0:2:0"
EndSection

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May 3, 2010

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Quote:

SOLVED (for my laptop at least - Acer Aspire 5740)

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Code:
xmodmap -pke
Please find the attachment keymap.txt.

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I have an issue with Debian 7.8 (wheezy) on my laptop. I've had to reinstall Debian on my laptop and since then I've had issues getting brightness controls to work properly.

It's a Core i3 370M processor with Ironlake graphics, I've had this issue before with Ubuntu and I sought [URL] ..... I've tried the steps that worked for Ubuntu (thinking they'd be the same as they're both Debian based) and it hasn't worked.

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Code:

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I have searched online with no success. The brightness control is working fine on my laptop. Problem is that the bars don't get rendered on screen. Instead I get like a static white line on screen everytime I press the brightness control. On boot however, I can see the correct bars. It is once I start my xsession, the bars do not show up. Here are my specs:

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It is my understanding that with the DDC/CI, monitors can have their brightness controlled just like laptop screens do, but better software controlled.

This is something I have done before with nvidia graphics, the open drive had the control and the proprietary only needed a small config setting. This was done however in a dekstop iMac, the screen also LED and HDMI.

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Jun 10, 2011

I've just installed the Nvidia drivers on my Debian, however, after i do it, the laptop brightness control doesn't work anymore... When i press the keys, i see the brightness bar, however, the brightness stays at maximum. I've used the following commands to install the drivers.

apt-get update
apt-get install nvidia-kernel-source
m-a a-i nvidia-kernel-source
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[code].....

The Laptop is a Sony Vaio VGN-FE21B with a Nvidia Geforce 7400

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