can t adjust brightness on lenovo laptop

You can substitute 100 with any value up to 127. # echo 100 > /sys/class/backlight/nvidia_backligh/brightness In order to manually change the brightness you have to write in the brightness file: $ sudo su Now the directory /sys/class/backlight/nvidia_backlight/ should be present. To activate the nvidiabl module you should issue the command: $ sudo modprobe nvidiabl First of all install git and dkms: $ sudo apt-get install git dkmsĭownload the code on your machine and compile the package: $ git clone

It is possible to enable the backlight by installing the nvidiabl module. The values of /sys/class/backlight/acpi_video0/brightness can be changed as well but the brightness remains the same. Setting brightness from the terminal and using xbacklight. Option 'RegistryDwords' 'EnableBrightnessControl=1'Īdding the options acpi_osi=linux acpi_backlight=vendor to the grub boot options If I press the relevant media keys, the indicator in ubuntu works correctly but the brightness is not changed.Įditing nf in this way: Section 'Device' The problem is that I can't adjust brightness at all.

I've installed Ubuntu 12.10 on a Lenovo Y500 laptop (2012), video card is Nvidia 650M (no integrated graphics), I'm using driver 310.19.

Can t adjust brightness on lenovo laptop