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 4E6E03BADAA for ; Mon, 17 Aug 2026 09:20:50 +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=1786958450; cv=none; b=iuSVCf/B64L9PlKP1wxTyZWzhx0vFqxyUys/XbH5HMmpitVt8mcNyevbNoVbQytRWEHhJdv+OtYXl2EzFtG2M9a39eqz58zGdceAMHICVhgGXTEh3UEUDGm+FBoUieqSkIq1WKienPBAGdpVF4PDzLmxHwccdKA8//YuM42piGw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786958450; c=relaxed/simple; bh=i0Rpx05Yc13ffI+daQyqgvyYBnzXDXedTwZKvdO3Sik=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=EyYT6kIv0030NuMpcEcnZ3miNmwnE+u0RcAqv8sIUp3JFfvVGEpgdBaegkVuFwq8NoUuXCp8mRrVHieljFRGKrosU7XzVxhyFXFw7olcMTepBspdINwgtqX6STWrwecqYJ10YNj6RLMQQVLb0mVwmcuMCf0cxKnnMkrBmmtsHbg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ww9zCMfN; 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="Ww9zCMfN" Received: by smtp.kernel.org (Postfix) with ESMTPS id EC6E7C2BCF4 for ; Mon, 17 Aug 2026 09:20:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1786958450; bh=i0Rpx05Yc13ffI+daQyqgvyYBnzXDXedTwZKvdO3Sik=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Ww9zCMfNCX9BRpGPFZH4bc5TKjdGi5l+tGJm0qnHvOBx4DXBLFJ+imRYT4gnHWmt1 O9s11IbyBiGtwSxuix9M9EI9bSNSNfESgV6HfiEQgcjh00Db6oqZ7bn0o1MGZcig8F WVmojZ0ecIY9PkSK9yq3OZrqCpgsMp+uHytb+hikw9AysZG4cDxbG4X2sxTeJGoa56 P4VIT0Hkp+zb6La7wMzRGU5wSCO1L0BZULsCUJQb25X9mSOc22Cj4zCI9pjcEOdW9T NYTMp4XknNhzUrPLZSqkyLP3iyEx/os2z4IaOHpsFbT7aPSzGK+mUhq0Y1yqN3zknj eB7ixZ75femuw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id DB86DC41612; Mon, 17 Aug 2026 09:20:49 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 221142] ucsi_acpi actively breaks USB-C PD charging on Lenovo Legion Pro 7 (Arrow Lake) Date: Mon, 17 Aug 2026 09:20:49 +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: trivial X-Bugzilla-Severity: normal X-Bugzilla-Who: huangwei@kylinos.cn 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: cc 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=3D221142 Wei Huang (huangwei@kylinos.cn) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |huangwei@kylinos.cn --- Comment #1 from Wei Huang (huangwei@kylinos.cn) --- Hi Alstergee, Thanks for the detailed report, and for verifying that blacklisting ucsi_acpi restores normal PD negotiation on this machine. The cleanest way forward is a DMI quirk for this model in drivers/usb/typec/ucsi/ucsi_acpi.c - there is already a quirk mechanism there, used for a similar EC firmware problem on LG gram laptops. To write the quirk, I need the exact DMI identification strings of the machine, which are not part of the report. Could you please attach the output of: sudo dmidecode -t system Alternatively, the contents of these files: /sys/class/dmi/id/sys_vendor /sys/class/dmi/id/product_name /sys/class/dmi/id/product_version /sys/class/dmi/id/product_family /sys/class/dmi/id/product_sku /sys/class/dmi/id/board_name /sys/class/dmi/id/board_version With that information I can prepare a patch and submit it upstream. Thanks! --=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.=