From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerone Young Subject: Re: [PATCH 3/5] thinkpad-acpi: make volume subdriver optional Date: Mon, 28 Dec 2009 15:30:36 -0600 Message-ID: <1262035836.6686.0.camel@laptop> References: <1261875137-27565-1-git-send-email-hmh@hmh.eng.br> <1261875137-27565-4-git-send-email-hmh@hmh.eng.br> <20091227183220.GB3027@khazad-dum.debian.net> <4B37E1AF.6030105@collabora.co.uk> <20091228131744.GC19362@khazad-dum.debian.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20091228131744.GC19362-ZGHd14iZgfaRjzvQDGKj+xxZW9W5cXbT@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ibm-acpi-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Henrique de Moraes Holschuh Cc: Amerigo Wang , linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Takashi Iwai , Ian Molton , ibm-acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Helight Xu , Ingo Molnar , Len Brown List-Id: linux-acpi@vger.kernel.org On Mon, 2009-12-28 at 11:17 -0200, Henrique de Moraes Holschuh wrote: > On Sun, 27 Dec 2009, Ian Molton wrote: > > Not directly related to your patch but I thought I'd mention... > > > > I've noticed issues with my X200 re: routing audio before / after docking. > > ThinkPads used to route line-out to the dock, with a fixed 1.1dB amplifier > (0.1dB increase) in the audio path, and had the volume control for > headphones and speakers done in a different audio path, extracted before the > line-out amplifier. The PeeCee beeper channel was routed to the headphones > and speakers, only. > > If Lenovo tried to reproduce that with the HDA mixer but without the "Laptop > Apudio Controller" the IBM thinkpads had, I wouldn't be surprised if it > causes massive ALSA disruption should the firmware screw with the HDA mixer > registers behind ALSA's back. Try asking the kernel to enable OSI(Linux) in > ACPI... I always forget the kernel command line parameter to do that, but > it is documented in the usual place. "acpi_osi=Linux" is the kernel command line param your looking for. > ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev