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 87651381EBA for ; Fri, 7 Aug 2026 10:34:43 +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=1786098883; cv=none; b=DFIUIP6zpmYDgTvkWltfb5Z52LClTWAjQrGefbVz82RQHjw/XQVxEnWMfUzy9R/OUEzrcj4mt3dV3Sod1lmw54GmnJf4XV27MOcG9MLfmTB/FOKi1aYzTlqmlpynQcK+I2nCdXP7Q216LPdd6nQlmH1IsgroFRIBHQ5cJbcX3CE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786098883; c=relaxed/simple; bh=4Ad3mCZ4Fo81jBIopv8qDzn8VJQnm/jHx6/ri+5YPVE=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=tFC7ZSQ1mwtJ4OUqo4PwrYGhRfnkKc6eOgsj55amEDd7i8E7pYr3sH+lOfeH2Qj0BC/bwUO8H/nScEtPcuP6lq6cOigyTreza6eqTiJsC64+PeGYetlYm9vCpsxVm5isMMtwCKDkoiRwoPIW1Sn9ZBxA7q3Y/Ei/3wxO+mE5cFs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WcqR5ieo; 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="WcqR5ieo" Received: by smtp.kernel.org (Postfix) with ESMTPS id 36098C2BCF7 for ; Fri, 7 Aug 2026 10:34:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1786098883; bh=4Ad3mCZ4Fo81jBIopv8qDzn8VJQnm/jHx6/ri+5YPVE=; h=From:To:Subject:Date:In-Reply-To:References:From; b=WcqR5ieob/031342JDigIyO7k82avSLee0uI0qVpzzyJtU7wBTSyZnD0Z3iUXOCSJ bu+5oMx2T6THZH4o/HNTgLPsqkr7pNS+qzHZmld15P4ucu8Z4CgqkROGNi9U05+SMx XA1yGoHspTXZK+Kdga/riM7+HNATFUACpx8iHeaeJE+mFnhYil3Qxu/hokx5PB9usw ZGgTGmJFqfM3rHgUqk0DC4is4NVMeAhFKh/a+nBNHS7fWuKm4JLbEY+H03JWPHpcar L8bf0HKF/QEWY55DWioPCIfvr8/lx0uVpPpL6ZjebdtMKI64s2zGxp3OMmUk0PuIHJ 1dSeZffCfd9ZQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 1BB0EC4160E; Fri, 7 Aug 2026 10:34:43 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-bluetooth@vger.kernel.org Subject: [Bug 221832] MT7925 (Foxcon T99H493.03) BT missing in lsusb on Vivobook S16 Date: Fri, 07 Aug 2026 10:34:42 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Platform Specific/Hardware X-Bugzilla-Component: ARM X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: aros@gmx.com X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: linux-arm-kernel@lists.arm.linux.org.uk X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status component assigned_to product 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-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221832 Artem S. Tashkinov (aros@gmx.com) changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |ASSIGNED Component|Bluetooth |ARM Assignee|linux-bluetooth@vger.kernel |linux-arm-kernel@lists.arm. |.org |linux.org.uk Product|Drivers |Platform Specific/Hardware --- Comment #10 from Artem S. Tashkinov (aros@gmx.com) --- Most likely root causes (in order of probability) * USB pins not wired / not enabled for this card on the Vivobook's M.2 slot. Many laptops only fully support the original vendor's card. The fact that t= he previous Qualcomm card's BT worked does not guarantee the USB signals are present or powered for a different vendor's card. * Missing or incorrect device-tree / ACPI description for the MT7925 Bluet= ooth function (power regulators, GPIO resets, USB hub ports, etc.). * Kernel is still trying to talk to the old Qualcomm BT (WCN7850) because = the platform firmware or DT still describes the original card. Reassigning to the platform subsystem because it's unlikely that the bt dri= ver can do anything about this considering it's not even initialized properly. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=