From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Renninger Subject: Re: [PATCH 1/3] X86 drivers: Introduce msi-wmi driver Date: Mon, 26 Oct 2009 22:56:28 +0100 Message-ID: <200910262256.28855.trenn@suse.de> References: <1256575458-19269-1-git-send-email-trenn@suse.de> <1256575458-19269-2-git-send-email-trenn@suse.de> <20091026170421.GA3515@srcf.ucam.org> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from cantor.suse.de ([195.135.220.2]:45931 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754468AbZJZTyv (ORCPT ); Mon, 26 Oct 2009 15:54:51 -0400 In-Reply-To: <20091026170421.GA3515@srcf.ucam.org> Content-Disposition: inline Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Matthew Garrett Cc: lenb@kernel.org, linux-acpi@vger.kernel.org On Monday 26 October 2009 06:04:21 pm Matthew Garrett wrote: > Only one question - does hitting the brightness keys automatically > change the backlight on non-ACPI backlight hardware driven by this? Hmm, not sure what you mean with non-ACPI driven. I can only talk about this specific model which only provides WMI (thus also ACPI driven) backlight functionality. No generic ACPI backlight functions as it seems only WindowsXP and not Vista is supported. The OS has to react on WMI notifications and the brightness change only happens when writing to IO via ACPI WSAA (WMI set block) function. So I expect the answer to your question is no. Thomas BTW: Does someone know already whether Windows 7 also requires generic ACPI backlight functions? Does someone have a good pointer to some published Windows 7 ACPI documentation/requirements?