From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Whitten Subject: Re: No sound from internal speaker on 2013 Macbook Air 6, 1 Date: Mon, 16 Sep 2013 10:44:27 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ie0-f174.google.com (mail-ie0-f174.google.com [209.85.223.174]) by alsa0.perex.cz (Postfix) with ESMTP id BC50F261A53 for ; Mon, 16 Sep 2013 11:44:28 +0200 (CEST) Received: by mail-ie0-f174.google.com with SMTP id u16so6742664iet.19 for ; Mon, 16 Sep 2013 02:44:27 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org > > > OK, then the normal jack detection doesn't work with this machine, as > > > it seems. You can try the above to all pins for checking if any of > > > other pins reacts to the headphone jack. > > > > No luck I'm afraid - none of the other pins seem to react to the > > headphones. Is there anything else you can think of that I can try > > tomorrow? > > Well, it might be notified via GPIO. Try to read GPIO pins except for > GPIO0. That is, set the all unmasked, the direction to READ. We have found that jack sense comes in on the headphone pin in a windows bootcamp install. However this bit isn't set in linux using either the default chip, bootloader, or windows pin configs. No other GPIO's are enabled in windows. Ben