Hello, i have an ASUS k56CM. every thing is ok i have nvidia with optimus so i use bumblebee with intel/nvidia.
the problem is sometimes after booting i have a good lighting and other times i have a very bad lighint (dark). i don't have any idea why this happen !
does any one have any idea ? i
PS: sorry for my english
Could you provide dmesg and other logs for times when it was good and for times when it was bad?
In any case, setting LCD brightness via laptop-mode-tools or a manually written bash script should solve the issue.
You could try adding "acpi_backlight=vendor" to your boot loader's kernel line.