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 D6F95CA9EB9 for ; Sat, 26 Oct 2019 09:40:10 +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 AAB492070B for ; Sat, 26 Oct 2019 09:40:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AAB492070B 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]:39440 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iOIYL-0008AI-Oa for qemu-devel@archiver.kernel.org; Sat, 26 Oct 2019 05:40:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56087) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iOIXG-00069H-Eg for qemu-devel@nongnu.org; Sat, 26 Oct 2019 05:39:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iOIXE-0008PO-Gv for qemu-devel@nongnu.org; Sat, 26 Oct 2019 05:39:01 -0400 Received: from zero.eik.bme.hu ([2001:738:2001:2001::2001]:11289) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iOIXE-0008LX-8r for qemu-devel@nongnu.org; Sat, 26 Oct 2019 05:39:00 -0400 Received: from zero.eik.bme.hu (blah.eik.bme.hu [152.66.115.182]) by localhost (Postfix) with SMTP id 10F3E747EC7; Sat, 26 Oct 2019 11:38:52 +0200 (CEST) Received: by zero.eik.bme.hu (Postfix, from userid 432) id 79BCB7456CA; Sat, 26 Oct 2019 11:38:51 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zero.eik.bme.hu (Postfix) with ESMTP id 70BE174569A; Sat, 26 Oct 2019 11:38:51 +0200 (CEST) Date: Sat, 26 Oct 2019 11:38:51 +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" Hello, 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 get ignored because nobody can reproduce it who would able to attempt debugging it. Regards, BALATON Zoltan