Currently I am using Linux 3.8.0-27-generic kernel on my Samsung laptop. I replaced grub configuration file with the following text to make backlight control work:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
I do not know if doing this causes a regression. If not, why is this not being included in the never version of kernels? There are not millions of computer manufacturers and at least this could be hardcoded, right?