lines neede exactly from the linpus linux 1.9..

when i prevously added these lines to my linux and updated grub my laptops brightness controller works perfectly without any problem..
but when i formatted my disk i lost the file...
i need these command lines..

i have the following but not works perfectly..
GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight
GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=legacy”

GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash acpi_osi=Linux”
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash nomodeset acpi_backlight=vendor”

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

the command line from the grub file of the linpus linux 1.9 works very perfectly...and all the brightness sliders works...on my acer aspire one 756
intel graphics