From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E59BCA9EB9 for ; Sat, 26 Oct 2019 09:47:21 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0CC0920867 for ; Sat, 26 Oct 2019 09:47:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0CC0920867 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=eik.bme.hu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:39460 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iOIfI-0005v5-2k for qemu-devel@archiver.kernel.org; Sat, 26 Oct 2019 05:47:20 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56675) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iOIe0-0003oQ-6L for qemu-devel@nongnu.org; Sat, 26 Oct 2019 05:46:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iOIdy-000365-ND for qemu-devel@nongnu.org; Sat, 26 Oct 2019 05:45:59 -0400 Received: from zero.eik.bme.hu ([2001:738:2001:2001::2001]:11694) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iOIdy-000333-3P for qemu-devel@nongnu.org; Sat, 26 Oct 2019 05:45:58 -0400 Received: from zero.eik.bme.hu (blah.eik.bme.hu [152.66.115.182]) by localhost (Postfix) with SMTP id 36204747EC7; Sat, 26 Oct 2019 11:45:55 +0200 (CEST) Received: by zero.eik.bme.hu (Postfix, from userid 432) id A04167456CA; Sat, 26 Oct 2019 11:45:54 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zero.eik.bme.hu (Postfix) with ESMTP id 91A7074569A; Sat, 26 Oct 2019 11:45:54 +0200 (CEST) Date: Sat, 26 Oct 2019 11:45:54 +0200 (CEST) From: BALATON Zoltan To: Howard Spoelstra Subject: Re: USB-audio sound issues with qemu-system-ppc in Linux and Windows. In-Reply-To: Message-ID: References: User-Agent: Alpine 2.21.99999 (BSF 352 2019-06-22) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2001:738:2001:2001::2001 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel qemu-devel Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Sat, 26 Oct 2019, BALATON Zoltan wrote: > On Sat, 26 Oct 2019, Howard Spoelstra wrote: >> I'd like to add to the previous report that similar issues are present in >> OSX (Sierra) builds of qemu-system-ppc. > > I think the problem is not specific to host OS so instead of giving debugging > info for all hosts which would just confuse anyone trying to reproduce it, it > may be better to just concentrate on Linux (as that's what most developers > would have) and ignore Windows and OSX hosts for now. > > It's probably also not specific to MacOS guests because I get similar > crackling sound on sam460ex with the ES1370 device with AmigaOS4 and can > reproduce the usb-audio shows up but does not make sound problem on > mac99,via=pmu with MorphOS so maybe either it's something with the sound > backend (like a buffer underflow in case of crackling that may be improved by > tweaking some parameters but I don't know what parameters are available or > how to set them) or maybe a problem with irqs (in case of no sound or > crashing MacOS guest but I don't know how to debug that either). Or I may be > completely wrong with my guesses so any advice from people knowing sound and > USB emulation in QEMU better is very welcome. (Also likely there are more > than one problem here so reporting them at once is also confusing, these may > need to be debugged separately.) > > So to most likely get useful feedback you should find a simple way to > reproduce it with Linux host and guest and describe that in the shortest way > to make it easy for interested developers to reproduce it then also cc your > Gerd who is the audio and USB maintainer. Otherwise it's likely these will correction: cc your message to Gerd > get ignored because nobody can reproduce it who would able to attempt > debugging it. > > Regards, > BALATON Zoltan > >