Arch Linux

WakiMiko

Member

Registered: 2008-09-19

Posts: 10

Changing brightness in X

None of the DEs I have tried are able to change my backlight brightness. The sliders in KDE etc. simply do nothing.

I can change my backlight in framebuffer mode by echo'ing the new value into /proc/acpi/video/NVID/LCD/brightness. However this only works in framebuffer mode, doing the same while X11 is running has no effect.  The only way I've been able to change the brightness with X running is with nvclock -S <new value>

Any way to get this working with the DE's own power managers?

My laptop is a Samsung R560 laptop with a 9600GT.

Last edited by WakiMiko (2009-10-10 16:13:02)

takedown

Member

From: Argentina

Registered: 2008-08-31

Posts: 219

Re: Changing brightness in X

xbacklight -dec 10%
xbacklight -inc 10%

WakiMiko

Member

Registered: 2008-09-19

Posts: 10

Re: Changing brightness in X

xbacklight -dec 10%
xbacklight -inc 10%

that gives me: No outputs have backlight property

uwinkelvos

Member

Registered: 2009-06-07

Posts: 129

Re: Changing brightness in X

http://aur.archlinux.org/packages.php?ID=25467

this module works on my 9300M GS. Don't forget to read and follow the post install instructions, though!

s0L

Member

Registered: 2009-10-06

Posts: 3

Re: Changing brightness in X

bind Fn-keys for change brightness with nvclock

applets are not needed.

Vamp898

Member

From: 東京

Registered: 2009-01-03

Posts: 903

Website

Re: Changing brightness in X

/sys/class/backlight/acpi_video0
echo "1" > brightness and see what happens xD

WakiMiko

Member

Registered: 2008-09-19

Posts: 10

Re: Changing brightness in X

http://aur.archlinux.org/packages.php?ID=25467

this module works on my 9300M GS. Don't forget to read and follow the post install instructions, though!

This worked! Thanks a lot!

WakiMiko

Member

Registered: 2008-09-19

Posts: 10

Re: Changing brightness in X

Damnit, now I have another problem:

When I move the brightness slider in KDE to the lowest level, the backlight turns off. However, it never turns on again when I increase the brightness again