Ubuntu: Ubuntu 10.04 Cant Adjust brightness on my lenovo Thinkpad?



Question:

I cant seem to be able to adjust the brightness on my think-pad laptop running Ubuntu 10.04. In the power management applet it shows that the power is set to 100%, but even if i try to lower it the actual screen brightness dosent change.

Any ideas of how I can get around this?

I tried changing the brightness from the terminal but its already set to Max brightness (however the actual screen brightness is no that bright at all).

Thanks


Solution:1

oh,I've met this problem before.All you need to do is:

sudo gedit /etc/X11/xorg.conf  

find segment like this:

Section "Device"  Identifier    "Default Device"  Driver    "nvidia"  Option    "NoLogo"    "True"  EndSection   

change it like this

Section "Device"  Identifier    "Default Device"  Driver    "nvidia"  Option    "NoLogo"    "True"  Option "RegistryDwords" "EnableBrightnessControl=1"  EndSection   

JUST ADD THIS LINE: Option "RegistryDwords" "EnableBrightnessControl=1" !

Then restart,It will work.


Solution:2

I was able to get my brightness keys working on my Lenovo W530 on Ubuntu 12.04 (posting here to help people looking for answer in future)...

These days X automatically configures itself, so you can't just edit the xorg.conf file, you, instead need to add a section to a file in /usr/share/X11/xorg.conf.d/ and X will include that section in the configuration that it automatically generates.

So to get the screen brightness keys working with your Nvidia graphics card, create a file in the xorg.conf.d directory, e.g:

sudo gedit /usr/share/X11/xorg.conf.d/10-nvidia-brightness.conf  

Paste the following into the file:

Section "Device"      Identifier     "Device0"      Driver         "nvidia"      VendorName     "NVIDIA Corporation"      BoardName      "Quadro K1000M"      Option         "RegistryDwords" "EnableBrightnessControl=1"  EndSection  

Log out and log back in, or reboot, and your brightness keys should now work!

(I blogged this here)


Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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