From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754119AbbINHqT (ORCPT ); Mon, 14 Sep 2015 03:46:19 -0400 Received: from mga02.intel.com ([134.134.136.20]:20303 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751425AbbINHqS (ORCPT ); Mon, 14 Sep 2015 03:46:18 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,526,1437462000"; d="scan'208";a="768502053" Message-ID: <55F67C43.9010402@intel.com> Date: Mon, 14 Sep 2015 10:50:27 +0300 From: Mathias Nyman User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.8.0 MIME-Version: 1.0 To: Andrew Gillis , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Bug in Linux USB stack References: In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12.09.2015 00:56, Andrew Gillis wrote: > I get an error when trying to play music through USB DACs under Linux. This > only happens with a few high end DACs and only when using a NEC uPD72020x > chipset USB 3.0 port. > > The people at RedHat think it may be the NEC uPD72020x chipset is reporting > it's capabilities incorrectly. > > I'm not sure why some only some DACs are effected. it may depend on their > chipsets. > > There is a detailed description of the bug with traces here > > https://bugzilla.redhat.com/show_bug.cgi?id=1240798 > > Any idea what I can do to fix this? > Can you re-send the logs. Both dmesg with xhci debugging enabled and lsusb -v. Clicking the links to the logs in redhat bugzilla justs says "The paste you are looking for does not exist" The command completion code 0x11 (17 dec) is a parameter error, indicating that xhci thinks that some value we used in the input context is wrong. -Mathias