From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Henningsson Subject: Re: [PATCH v2] ALSA: hda - Fix Skylake codec timeout Date: Thu, 16 Jul 2015 17:31:33 +0200 Message-ID: <55A7CE55.5010700@canonical.com> References: <1437035964-5658-1-git-send-email-david.henningsson@canonical.com> <96A12704CE18D347B625EE2D4A099D19687270@SHSMSX103.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by alsa0.perex.cz (Postfix) with ESMTP id 8AC07260575 for ; Thu, 16 Jul 2015 17:31:25 +0200 (CEST) In-Reply-To: <96A12704CE18D347B625EE2D4A099D19687270@SHSMSX103.ccr.corp.intel.com> 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: "Yang, Libin" , "tiwai@suse.de" , "hui.wang@canonical.com" , "alsa-devel@alsa-project.org" , "Lin, Mengdong" , "Lu, Han" List-Id: alsa-devel@alsa-project.org On 2015-07-16 17:14, Yang, Libin wrote: >> -----Original Message----- >> From: David Henningsson [mailto:david.henningsson@canonical.com] >> Sent: Thursday, July 16, 2015 4:39 PM >> To: tiwai@suse.de; hui.wang@canonical.com; alsa-devel@alsa- >> project.org; Yang, Libin; Lin, Mengdong >> Cc: David Henningsson >> Subject: [PATCH v2] ALSA: hda - Fix Skylake codec timeout >> >> When the controller is powered up but the HDMI codec is powered >> down >> on Skylake, the power well is turned off. When the codec is then >> powered up again, we need to poke the codec a little extra to make >> sure it wakes up. Otherwise we'll get sad "no response from codec" >> messages and broken audio. > > Thanks for finding this issue. > > Could you please give us you test case? We didn't meet such issue > before. I would like do a full test on it. The test case is: - Install Ubuntu 15.04. - Upgrade to kernel 4.1. - Boot the new kernel. Note: I believe Hui tested with 4.1 and got this error. In my case I have been running a hybrid kernel: Ubuntu 15.04, kernel 3.19.0-23.24 (which has a backported i915 driver), and then the alsa-daily DKMS on top of that. I can email you off-list with details about the machine I tested it on, if you like. -- David Henningsson, Canonical Ltd. https://launchpad.net/~diwic