View Full Version : [ubuntu] lxde monitor brightness keyboard control "not" working

December 4th, 2012, 08:06 PM
Hi everyone,

I have a samsung netbook (N150) with an Intel(R) Atom(TM) CPU N450 @ 1.66GHz (32 bit), 1 GB RAM and an Intel GMA graphic processor as graphic card. I have ubuntu 12.04 LTS with lxde running.

After installing power management, with all the features like battery icon in system tray, I could use the keyboard buttons to adjust monitor brightness.

After last kernel update (3.2.0-34-generic), when I use the brightness buttons I still see the on screen display indicator with a bar that moves if I try to increase or to reduce the brightness but, actually, nothing happens to the real brightness of the monitor.

I don't know if it has to do with the new kernel or with other updates.

Thanks for your help!

January 17th, 2013, 09:50 PM
Despite I updated constantly the system, the problem is still here.

Any suggestion?


black veils
January 18th, 2013, 09:06 PM
i would try adjusting as you said the on screen display shows, then restart to see if it has taken affect.. its the only way my screen brightness can be altered.

if that doesnt work, use previous kernel. when booting the computer, hold the Shift key down to show grub menu and choose kernel version.

February 13th, 2013, 08:31 PM
OK, thanks. So I hope that this will be fixed in the next kernels.