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 5B1471E9B3A for ; Mon, 5 Jan 2026 15:28:12 +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=1767626894; cv=none; b=fbxhWynS/+BPBiJj8L7UwVhUvARVmkYgG9NRCTG90QOefa8skO7rrL/86DzS5C/d8Sg7SRw9EuDKU8eL5HaKi8QIFKoRHEFr6pvaYEel88PE1guwChHcDdhpbjZkWpKXoIwwofEGitRNV/xy5toZe2HNwpIt1eAQ8thb74agdP0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767626894; c=relaxed/simple; bh=Z+Zp2s/nFyWZS+dPJv3sqGP51zfVg8+SbOe71aC6YQs=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=mNqV60mgCN0tqWiypHfO+Z9NGvMXoT/ZgkgcKqtu0ar/WIwLE9x9KTrj6NCQobTk6e84Wi8iJn9/T+szQGrGZJ+eiiwiX3qoNzvcbeaOsfdUjQdTQSPSsTGte8dEO37fgsvQBK7IKEHHNoIjlWQk75GW6HF1ksW/wMoxXv8Elrg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LvUz8swf; 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="LvUz8swf" Received: by smtp.kernel.org (Postfix) with ESMTPS id CC4CCC19421 for ; Mon, 5 Jan 2026 15:28:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767626892; bh=Z+Zp2s/nFyWZS+dPJv3sqGP51zfVg8+SbOe71aC6YQs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=LvUz8swfhsQ2dTkIyRn0ukHdLQQMF5TeNwTBarorfAFo93D0Fr0vgTug9EHWum9Ls /Ute62c61fl1nIRN9xOteQV6HyRDESeuXcm0MKeWM2Z5rgEa334XSrCgffIutk4IZN 5YAqjSgrdw+KVIGjuRDaC/luJnTiFZkeIPQhZwuCB4eT6yqYqhT7wSaSwDmPMWzfiA Ni54b4U6fsOioHtvM5xu6zieZ4OhTeb6TquYP2OWbc+am4ZG1CFW5uoM5ao1xWTbim 7j/HrWC5pmF7wF3Xd18WssF4NbluVldoS1i2394UPqqoc0J1dlk5eC0iyeJPNBnCae qlUf6u1vwnQCg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id C0276C3279F; Mon, 5 Jan 2026 15:28:12 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 220904] [BUG] ucsi_acpi: USB 3.0 SuperSpeed not negotiated on USB-C hot-plug Date: Mon, 05 Jan 2026 15:28:12 +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: mathias.nyman@linux.intel.com 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=3D220904 --- Comment #9 from Mathias Nyman (mathias.nyman@linux.intel.com) --- The log entries about 'root hub lost power or was reset' means xHC controller failed to resume properly, and will be reset and re-initiali= zed. There are no other log entries after this from that xHC, so it's possible there is something failing during re-initialization. could you enable xhci and usb core dynamic debug and send a new dmesg of a failing case: echo 'module xhci_hcd =3Dp' >/sys/kernel/debug/dynamic_debug/control echo 'module usbcore =3Dp' >/sys/kernel/debug/dynamic_debug/control --=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.=