View Full Version : [SOLVED] screen brightness level

November 18th, 2012, 01:32 PM
everytime i swtich on my laptop, its brightness is at lowest level...i change it as i m attaching clip to show in system settings,, but every other time after restart, i find brightness at lowest level... why my changes are not perstistent???how to do it???

November 18th, 2012, 02:59 PM
What is the make and model of your laptop?

What video card and driver do you have? Open a terminal window, type in the following command, and post back the results:

sudo lspci -vnn | grep -A10 VGA

Perhaps this thread might help: http://ubuntuforums.org/showthread.php?t=1972303&highlight=screen+Brightness+ste+0%25.

November 18th, 2012, 05:55 PM
In a terminal:

gksudo gedit /etc/rc.local

Put this line before the "exit 0" line:

echo 10 > /sys/class/backlight/acpi_video0/brightness

Save, reboot and see. Note that 10 means full brightness.

November 19th, 2012, 01:06 PM
gksudo gedit /etc/rc.localput this line before the "exit 0" line:

echo 10 > /sys/class/backlight/acpi_video0/brightness .

it worked...thanks dear

February 1st, 2013, 05:51 PM
I'd just like to point out that people trying to fix this should check the path provided because on some other forum/topic they said intel_backlight, but on my system it says acpi_video0. Just a heads up for people less skilled, who are looking for quick fix. And it works, yes. Sorted out mine at least :)