patch works for me, but I need to add "acpi_backlight=vendor" to kernel
params
Signed-off-by: NSmelov Andrey <xor29a@bk.ru>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>