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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 86A90C43458 for ; Sun, 28 Jun 2026 22:01:20 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [45.14.194.44]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 1B4D9601EF; Mon, 29 Jun 2026 00:01:08 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 1B4D9601EF DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1782684078; bh=G9xsGgrtIkp+Fg+VIan6tyx+WkvxAf2eS4LhZEp/m7o=; h=From:To:In-Reply-To:References:Subject:Date:List-Id:List-Archive: List-Help:List-Owner:List-Post:List-Subscribe:List-Unsubscribe: From; b=q7SXxsfSAlNZWwx/n65RWpiKfCnnhwvfJych0BPKtAAbnEPBUi99Mut62PrRbMpQw KanTHhFI+sRDP3qVaFpV5yLLYqMXLgDVBKDH3Mf9csjtk6VW3IiJS4h8VJ1Z1iL852 JtNvCOj0JRi0jo4P20J/GgP6Ez1sJWbBpSNHWfhA= Received: by alsa1.perex.cz (Postfix, from userid 50401) id 56AA3F80600; Mon, 29 Jun 2026 00:00:40 +0200 (CEST) Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id A3E47F805FF; Mon, 29 Jun 2026 00:00:40 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id CB8ADF805D6; Mon, 29 Jun 2026 00:00:31 +0200 (CEST) Authentication-Results: alsa1.perex.cz; arc=none smtp.remote-ip=45.14.194.44 ARC-Seal: i=1; d=alsa-project.org; s=arc; a=rsa-sha256; cv=none; t=1782684030; b=FTtUR+twC7Gm7OOgoAdfcO1fA3kMPM9QJ1fDzPjVWQmMGl2Zmhbbo7cci0O4yHaN4Bhm wkklSMd4Qk2o0/Uw4uqLEWYtLGUkn80YjVGgxN60TrhuB7SnmCCIF0bjUDuWMJKeijmLJ a8P63baFFb34TSmEg44q/CAEN5v/PdJPlwx2c1KXpiWuiQahJxGfLEROKihHpfCkWWbjj mS6FL1fyghGRFhQXH8Yl/2Acyr1gIafynokGRWEKoBV6R959+9Q86nxb/2LrSrvA5lRFH nVA+BUcHPwWgxa4aO9oTrGCi0XKeSr1uuKgplSLF5KhdYE7DR/UOWrGKFmyTS6Iz7VA== ARC-Message-Signature: i=1; d=alsa-project.org; s=arc; a=rsa-sha256; c=relaxed/simple; t=1782684030; h=MIME-Version:From:To:Message-Id:Subject; bh=G9xsGgrtIkp+Fg+VIan6tyx+WkvxAf2eS4LhZEp/m7o=; b=K8tKyfcVvZj6DdXv/MA/PJZ3BWkq2H6K8dtLcpmSBZnO7tPIYxXfG87bsB198salKSa8 8vNrSMydIYpe5YNJ8FEh/y1sAWDQGncy+0MA5muYTN7yhTPLKBnzrKFnNpNgmXSSumrb/ ejUgDKnhShPJDIZJaGEaPk5YbFJpTab+pvZbdlI+PnSqBIA69fMuPVQW5oK4QCx3TAPPD sMj7E/ECVIen/I03+I6TraAxU04Zczp/yLOOSItfH/ym0W6xLNzaCo/XPu5Olfk6VCoWd F6AGw0ntZvJYYbS4+Rm9cC0LE90xVoXJFJuDP2rYRJbuqKeVIJqbj5Jus5EgEOWg3vg== ARC-Authentication-Results: i=1; alsa1.perex.cz; arc=none smtp.remote-ip=45.14.194.44 Received: from webhooks-bot.alsa-project.org (vmi2259423.contaboserver.net [45.14.194.44]) by alsa1.perex.cz (Postfix) with ESMTP id 967B9F80212 for ; Mon, 29 Jun 2026 00:00:29 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 967B9F80212 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit From: GitHub issues - opened To: alsa-devel@alsa-project.org Message-Id: <18bd5dadf0facb00-webhooks-bot@alsa-project.org> In-Reply-To: <18bd5dadf0d1b400-webhooks-bot@alsa-project.org> References: <18bd5dadf0d1b400-webhooks-bot@alsa-project.org> Subject: Steinberg UR44C (0499:1730) incorrectly matched to UR44 UCM profile (PlaybackChannels mismatch) Date: Mon, 29 Jun 2026 00:00:31 +0200 (CEST) Message-ID-Hash: S3MCPU37Z2ELQXJANHCUYIXSSD7RKNWJ X-Message-ID-Hash: S3MCPU37Z2ELQXJANHCUYIXSSD7RKNWJ X-MailFrom: github@alsa-project.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: alsa-project/alsa-ucm-conf issue #799 was opened from abentley: Note: Google AGY wrote this, but I have manually verified all claims. The Steinberg UR44C (USB ID 0499:1730 ) is currently matched to the Steinberg/UR44 UCM profile in ucm2/USB-Audio/USB-Audio.conf via the following rule: If.steinberg-ur44 { Condition { Type RegexMatch String "${CardComponents}" Regex "USB0499:17((00)|(30)|(04))" } True.Define.ProfileName "Steinberg/UR44" } However, the UR44 UCM profile defines PlaybackChannels=4 (since the original UR44 only has 4 output channels). The UR44C hardware actually exposes 6 playback channels (as confirmed by /proc/asound/cardX/stream0 ): Playback: Interface 1 Altset 1 Format: S32_LE Channels: 6 This mismatch causes WirePlumber/PipeWire to fail to load the UCM profile with the following validation error: spa.alsa: Error in ALSA UCM profile for _ucm0003.hw:UR44C,0 (HiFi: Line2: sink): PlaybackChannels=4 < avail 6 spa.alsa: Errors in ALSA UCM profile for card Steinberg UR44C Suggested Fix: Exclude the UR44C product ID ( 1730 ) from the steinberg-ur44 regex condition so it falls back to standard ALSA Card Profiles (ACP) instead of attempting to load the incompatible UR44 UCM profile. Issue URL : https://github.com/alsa-project/alsa-ucm-conf/issues/799 Repository URL: https://github.com/alsa-project/alsa-ucm-conf