From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxim Levitsky Subject: acpi 'video' driver, and issues with 'brightness_switch_enabled=0' Date: Mon, 27 Apr 2009 20:57:32 +0300 Message-ID: <1240855052.11237.7.camel@maxim-laptop> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel Cc: "linux-acpi@vger.kernel.org" List-Id: linux-acpi@vger.kernel.org I have a notebook which handles brightness keys in hardware, but tells loudly when it does so. Currently, acpi 'video' also sets the brightness, which result in double setting, and on top of that it emits a key that makes gpm set brightness again. And (yes...) on top of that keyboard emits a brightness up/down even, which (you guessed...) sets brightness again. I found out that it is possible to tell gnome-power-manager not to set brightness, but yet in kernel driver still sets it. I found out even earlier that I can use brightness_switch_enabled=0, which supposed to make inkernel driver not touch the brightness. But I found out that this driver won't update the brightness, in /sys interface when I set this param. So what you can suggest here? Regards, Maxim Levitsky