Bug#651741: gnome-power-manager: display backlight brightness has no effect on Sony Vaio VPCYA1V9E

[littlebat <dashing.meng@gmail.com>]

It seems adding only one kernel parameter "acpi_backlight=vendor" also works on my G360 now. But, both methods of adding kernel parameters will stop work occasionly.

The detail of my case see:

Bug 44809 - [Arrandale backlight] Brightness via RANDR has no effect on Sony VAIO VPCYA1V9E: https://bugs.freedesktop.org/show_bug.cgi?id=44809

2012/6/12 littlebat <dashing.meng@gmail.com>

Added "acpi_backlight=vendor acpi_osi=linux video.brightness_switch_enabled=1"
into grub boot kernel parameters, "Fn + Up/Down" to change brigtness works on
my G360. It's no need to write a Udev rules like my previous method.