My backlight works perfectly with "# echo 0~4882 > /sys/class/backlight/intel_backlight/brightness" but when I use hotkeys or change backlight setting in gnome nothing happens because they use /sys/class/backlight/acpi_video0/. How can I make gnome settings to use intel_backlight?
also try this acpi script
but did not work
"sorry my poor english""
Last edited by souenzzo (2013-12-09 00:11:39)
I have same problem tooo .. I am on Sony VPCEG25EN ... Exactly same problem.. Please help !!
Let's confirm some settings:
1. Which kernel boot parameters, if any, have you enabled:
2. What video cards/drivers are you using:
lspci -k | grep -iA2 VGA
3. What backlight interfaces do you have and what are their values:
for i in /sys/class/backlight/*; do echo $i;cat $i/brightness;cat $i/max_brightness;done
If its just an intel video card that you have, the Intel Graphics wiki suggests editing/creating /etc/X11/xorg.conf.d/20-intel.conf with the following content:
Section "Device" Identifier "card0" Driver "intel" Option "Backlight" "intel_backlight" BusID "PCI:0:2:0" EndSection
Thanks a lot man!
And this setup looks fancy! Brightness adjusts smoothly.