From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752271AbcCIHpC (ORCPT ); Wed, 9 Mar 2016 02:45:02 -0500 Received: from mx2.suse.de ([195.135.220.15]:35715 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750942AbcCIHoy (ORCPT ); Wed, 9 Mar 2016 02:44:54 -0500 Date: Wed, 09 Mar 2016 08:44:52 +0100 Message-ID: From: Takashi Iwai To: Alexander Andrejevic Cc: linux-kernel@vger.kernel.org Subject: Re: BUG: VIA HD Audio sound card support regressed In-Reply-To: <20160309015452.GA17148@SDF.ORG> References: <20160309015452.GA17148@SDF.ORG> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/24.5 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 09 Mar 2016 02:54:53 +0100, Alexander Andrejevic wrote: > > Hi, > > A regression in the Intel HD Audio driver was introduced by commit > 12daef65fd868cf30be5afe3e6be6689c44c7940 (2011-06-20 14:24:07 GMT). > Namely, a VIA VT1708-based card with the PCI ID 1106:3288 stopped working > entirely, even though no apparent error message is produced in the log by > the driver. > I've debugged this issue and determined that the card needs two additional > initialization verbs to be sent to it: > > {0x26, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT} > {0x26, AC_VERB_SET_EAPD_BTLENABLE, 0x02} > > However, I don't know whether this applies to all VT1708-based cards (it > most likely doesn't), nor how would they be affected by these additional > commands, so I'm not sure how to properly patch this issue myself. > Perhaps the correct way to do it is to add an SND_PCI_QUIRK for this card? Could you open a bug report in bugzilla.kernel.org and attach the alsa-info.sh outputs taken from both the old (good) kernel and the recent broken one? Run the script with --no-upload option and use attachments. Takashi