From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753944Ab2CMNfI (ORCPT ); Tue, 13 Mar 2012 09:35:08 -0400 Received: from cavan.codon.org.uk ([93.93.128.6]:57511 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753329Ab2CMNfF (ORCPT ); Tue, 13 Mar 2012 09:35:05 -0400 Date: Tue, 13 Mar 2012 13:34:59 +0000 From: Matthew Garrett To: Pradeep Subrahmanion Cc: rpurdie@rpsys.net, FlorianSchandinat@gmx.de, akpm@linux-foundation.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Added backlight driver for Acer Aspire 4736 Message-ID: <20120313133458.GA11574@srcf.ucam.org> References: <1331608337.2267.67.camel@debian.Gayathri> <20120312175130.GA18002@srcf.ucam.org> <1331640592.3485.50.camel@debian.Gayathri> <20120313124738.GB10822@srcf.ucam.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 13, 2012 at 06:56:16PM +0530, Pradeep Subrahmanion wrote: > I tried giving acpi_backlight = vendor . In that case hot key for > brightness control is working. But i think , it is not calculating the > correct value for brightness because increasing brightness after maximum > level gives blank screen . Which backlight device appears then? > By ' ACPI interface' , I mean 'acpi_video0' inside the > /sys/class/backlight. I havn't tried the /sys/class/backlight interface > directly . I will try that also. So writing values into /sys/class/backlight/acpi_video0/brightness does nothing? -- Matthew Garrett | mjg59@srcf.ucam.org