cannot adjust laptop brightness

Asked by kiran on 2014-01-02

i am using lenovo g580 ubuntu 13.10
i cannot adjust the brighness of my laptop.
it worked in 12.04
i tried
GRUB_CMDLINE_LINUX_DEFAULT="acpi_osi=Linux"
and
GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor"

i installed xbacklight still it is not working

Question information

Language:
English Edit question
Status:
Solved
For:
Ubuntu xserver-xorg-video-nv Edit question
Assignee:
No assignee Edit question
Solved by:
kiran
Solved:
2014-01-02
Last query:
2014-01-02
Last reply:
kiran (pskirann) said : #1

#problem solved
#Brightness
create the file /usr/share/X11/xorg.conf.d/20-intel.conf with the following content:

#Add the following
Section "Device"
        Identifier "card0"
        Driver "intel"
        Option "Backlight" "intel_backlight"
        BusID "PCI:0:2:0"

EndSection