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=-3.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 3C53FC433E0 for ; Mon, 18 Jan 2021 07:44:25 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (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 6CFCE22242 for ; Mon, 18 Jan 2021 07:44:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6CFCE22242 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id C9DB61791; Mon, 18 Jan 2021 08:43:29 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz C9DB61791 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1610955859; bh=GW0kuuu+RrrkFGXv9U6F+5i6Qut2g+Gf7DCuY1QVscE=; h=Date:From:To:Subject:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=LamYnSlK4/4dnP4XClSr8YJnls8uD5UHEJIG/p9iPwnS8pLXqrlAUoSw5tHu9WeVt 4cMBP3w7jKTupL8z+CsMIYHX8Tq3z1PBOYbgA/yAZQteh9Aw7bBE9ArdHoNp+3toYf nrAsNPxveZof92Q2LjZNu5NJ0EA9EGfI2eWqg388= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 3ED4FF80166; Mon, 18 Jan 2021 08:43:29 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 9FEDEF8016E; Mon, 18 Jan 2021 08:43:26 +0100 (CET) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 3CAA6F800C0 for ; Mon, 18 Jan 2021 08:43:17 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 3CAA6F800C0 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 281FBAC4F; Mon, 18 Jan 2021 07:43:17 +0000 (UTC) Date: Mon, 18 Jan 2021 08:43:17 +0100 Message-ID: From: Takashi Iwai To: Mike Oliphant Subject: Re: Support for NUX MG-300 USB interface In-Reply-To: References: 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/25.3 (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 Cc: alsa-devel@alsa-project.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On Sun, 17 Jan 2021 19:56:01 +0100, Mike Oliphant wrote: > > I recently got a NUX MG-300 USB guitar fx interface with high hopes that it > would work in Linux. It is supposed to be class-compliant, and works in iOS > and macOS without a driver. > > Unfortunately, while it is recognized as a USB audio device by Linux, it is > not working. > > The core issue seems to be that "stream0" reports no playback rates. dmesg > also shows errors, including "__uac_clock_find_source(): selector reported > illegal value". > > Any help identifying the issue would be much appreciated. I have some > experience troubleshooting the USB audio kernel code and am happy to try > doing so if I can get a nudge in the right direction. > > Output from "stream0", dmesg, and lsusb follows. Did you try the latest 5.11-rc kernel? There have been lots of changes in USB-audio and this might work better there. If it still doesn't work with 5.11-rc, please try to enable the debug option, e.g. boot with snd_usb_audio.dyndbg=+p boot option, plug the device, and get the kernel logs (at plugging and during the audio operations). thanks, Takashi