From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D744C3D6CAA for ; Thu, 9 Jul 2026 07:27:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.75.126.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783582059; cv=none; b=vDdsaSLkGhU6lyV/3p8i5nozRA7xkBTAXN92Zhg/apMsgLUImZyD+xgS18YTiAVuSvLN+4jQYtA0Lk3hsyj2KUTs3vs2X4IxXXJv0uMZ0fd9WNsNwekPmxPhBk0Cyj9Sov+fP4bNdhb9NK57NNjzNDSl2uVvBH5bmEhKKS7DOZw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783582059; c=relaxed/simple; bh=rTya/fpGKrIGgS30F1dSK0WMZhgSGTc1NkAk7i8HJD4=; h=From:To:CC:Subject:Date:Message-ID:Content-Type:MIME-Version; b=SkHG/swRjyoaQr0hSbBjP83LXvd105wwiV1zeLxgOAzCGa3BTDqiSJXwMoZgBmpfNkqkKoq7aRBrWMwwSaF1QU/iWMBgNkVhPvAwYse5oj51BDYbL6mgqOkmDWNw7YR1Y52oWW3nHkxxRpCTCwYqgBnj1s+nCymfnamAlJu4u4M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=realtek.com; spf=pass smtp.mailfrom=realtek.com; dkim=pass (2048-bit key) header.d=realtek.com header.i=@realtek.com header.b=h3H+rSON; arc=none smtp.client-ip=211.75.126.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=realtek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=realtek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=realtek.com header.i=@realtek.com header.b="h3H+rSON" X-SpamFilter-By: ArmorX SpamTrap 5.80 with qID 6697REEN02903496, This message is accepted by code: ctloc85258 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=realtek.com; s=dkim; t=1783582034; bh=f81aJAbRl0PxCU944JQB0HSTwJXSLdfp8ikW5U75v2U=; h=From:To:CC:Subject:Date:Message-ID:Content-Type:MIME-Version; b=h3H+rSONxlewbrlcKS2P58MF5mhYcyYP5Arg3r4wmuWonOgJLGGpHGUHdHpfeMF9u ga0Zuopcyj8Ywwv+MjHJvW3FSxQANvG4OHxDOAYQByBPXdzbc4tbZ4Y/0s7dzZt1Wx +5LdGLzqwz9tKNr5BgTeFJKryAAVV86WOZnx2cFQOyaV3OPBIS1zOWTp1FTwtVwn45 20UsLJuAUOV5rrGceLUZlNMSnfasfJ+M7Vfjs0/NBFu7D/N+5SHmX/BSOYAhvdLYfG lsJjtO/v45u/SI5Pxb9Q1d2KURog92PYIXUlqMsSNIQQYQrV4i1iYhYgk/sFMDTLba 8Kn5GVoX3mqgQ== Received: from mail.realtek.com (rtkexhmbs02.realtek.com.tw[172.21.6.41]) by rtits2.realtek.com.tw (8.15.2/3.29/5.94) with ESMTPS id 6697REEN02903496 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 9 Jul 2026 15:27:14 +0800 Received: from RTKEXHMBS01.realtek.com.tw (172.21.6.40) by RTKEXHMBS02.realtek.com.tw (172.21.6.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Thu, 9 Jul 2026 15:27:14 +0800 Received: from RTKEXHMBS06.realtek.com.tw (10.21.1.56) by RTKEXHMBS01.realtek.com.tw (172.21.6.40) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Thu, 9 Jul 2026 15:27:14 +0800 Received: from RTKEXHMBS06.realtek.com.tw ([::1]) by RTKEXHMBS06.realtek.com.tw ([fe80::e6fd:5a3f:8946:92c4%10]) with mapi id 15.02.2562.017; Thu, 9 Jul 2026 15:27:14 +0800 From: Kailang To: "Takashi Iwai (tiwai@suse.de)" CC: " (alsa-devel@alsa-project.org)" , "linux-sound@vger.kernel.org" Subject: Fixed Headphone noise issue for Dell QCM1255 Thread-Topic: Fixed Headphone noise issue for Dell QCM1255 Thread-Index: Ad0Pc2V5/SNTDyoaQoGucr6gAJ7feA== Date: Thu, 9 Jul 2026 07:27:14 +0000 Message-ID: <34b990cb56914148ba02fa8e9d176479@realtek.com> Accept-Language: zh-TW, en-US Content-Language: zh-TW X-MS-Has-Attach: yes Content-Type: multipart/mixed; boundary="_002_34b990cb56914148ba02fa8e9d176479realtekcom_" Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 --_002_34b990cb56914148ba02fa8e9d176479realtekcom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Takashi, This platform booted with Ubuntu 24.04 with Pipewire audio server. So, it h= as pop noise with headphone. But it's normal with Pulseaudio server. This patch was the workaround. Connect the headphones to DAC 0x2. The popping sound will disappear. This solution was approved by Dell. Thanks. 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