From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933027Ab2KNRMi (ORCPT ); Wed, 14 Nov 2012 12:12:38 -0500 Received: from lxorguk.ukuu.org.uk ([81.2.110.251]:52717 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422781Ab2KNRMh (ORCPT ); Wed, 14 Nov 2012 12:12:37 -0500 Date: Wed, 14 Nov 2012 17:17:55 +0000 From: Alan Cox To: Forconi Cc: linux-kernel@vger.kernel.org Subject: Re: KMS Framebuffer on Intel N2600 (GMA3600) Message-ID: <20121114171755.27b8423b@pyramind.ukuu.org.uk> In-Reply-To: <624976355.1341772.1352911727159.JavaMail.root@zmail.sgconsulting.it> References: <20121114115255.2dfaefc9@pyramind.ukuu.org.uk> <624976355.1341772.1352911727159.JavaMail.root@zmail.sgconsulting.it> X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.8; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > This backlight problem appears only when I run linux with KMS framebuffer, > when I run linux without KMS framebuffer, the backlight is always on. > > Yes, I have ACPI enabled and ACPI backlight enabled, but running: > echo 100 > /sys/class/backlight/psb-bl/brightness psb-bl/backlight willbe the backlight of the graphics not the ACPI driver. You may need to enable that and also hack the acpi_video code to add it anyway on that device. > But, in the end, this means that the driver si correctly loaded and the > framebuffer is running but the panel backlight is off? > In other words, I can't see anything only because the backlight is off? I think so. > I don't know which could be the maximum value, there are any standard values > for backlight settings? I could try setting some values and see what happens... Unfortunately not - and I have no idea what overdriving it would do to the hardware. Alan