From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7708A20012C for ; Tue, 6 Aug 2024 14:41:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722955267; cv=none; b=jnGbURyqCYqBd0hLsytkKPYoBDz+f73Sk+SH36Hi1RQLFvdhtbIFyEs5W7quBkfYIqYQ8MY3ruJgIBGk3CtL9b3prRM+RL7xf/bCvdPMfDoBT2yqzob9VIrPnVey+eGdbxAWzpjNL8Qtx0qHsyt5dOE3DH/dFOCH7PpJb90t2D4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722955267; c=relaxed/simple; bh=vi6gKGVEJT8tBLg6amBxzIK45RQuUSxhYHHpxbaRd2w=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=c+rMxQV17irgsqZ5ytKUk4lbeGNoXve7v4NV5vSufuGfP/SI3I46TPkeY3bzcXiFDstvRepW+w3o9/D4d7Q7rDlBSGKgcwiPPiKyL508Vlj4xJcXNXxYZIuw6hvt208tH727NfRcpVQg7hOD3xQYEsM3Rst56rh+jhYYLXFM3cs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=J/tiBK7T; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="J/tiBK7T" Received: by smtp.kernel.org (Postfix) with ESMTPS id 1A516C4AF0D for ; Tue, 6 Aug 2024 14:41:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722955267; bh=vi6gKGVEJT8tBLg6amBxzIK45RQuUSxhYHHpxbaRd2w=; h=From:To:Subject:Date:In-Reply-To:References:From; b=J/tiBK7T/mXpPFg+sLVr1nl0E15kf7fcPbT66tahpxwfA75kKJScOaHit4C0nrLVs TlqNRWfWhaWg1rW+GPChYMBENvAdffm0IImhg/w+Q8rJfCSRManpH2mSNuo1DaSw7v M1QvG4WtaVwYZFlkbhpqPoRn55ZBPb+HKDN8iBlb/XosfX/2rTWh2ULAPqjeiu/aej wQBeL8QeS/8YuBkfW+7GHZU3NzelqfWrpXToKbQRx8Korb1RqrBoKDR7xR6nYkXDGq iSQpyQXxMnruO6C7AYQ6NE6Taa0tYJjax1KkRraFMQGXMkDd/24rVTcTLm6a0gfzRE 9Q4LrVThYhftg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 0497AC53B73; Tue, 6 Aug 2024 14:41:06 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 219111] Xone:23C mixer not recognized as a 2in/2out device Date: Tue, 06 Aug 2024 14:41:06 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: stern@rowland.harvard.edu X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D219111 --- Comment #28 from Alan Stern (stern@rowland.harvard.edu) --- As I understand it, each audio channel gets transported over its own USB endpoint. (This is true for both mono channels and stereo channels.) So t= wo stereo-in channels require two endpoints, and two stereo-out channels would require an additional two endpoints. Similarly, four in channels would req= uire four endpoints. Maybe my understanding is wrong; I'll have to read through the USB Audio Cl= ass specification to make sure. The usbmon trace and the Wireshark log you attached both mention only two endpoints. Can you get a Wireshark trace showing what happens when you transmit or rec= eive data over two in channels and two out channels (so using four endpoints) al= l at the same time? Also, can you attach a copy of the "lsusb -v" output for the device when it= is attached with old_scheme_first set to Y? --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=