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 8047D18C008 for ; Wed, 26 Aug 2026 03:55:38 +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=1787716538; cv=none; b=biYCiJkkcPElkMpZoYkiUlG9XT/sobaGWGkb4HoBimKwge13ri+olhdTANz3t3AeEEj10ZaBXBMexgFCd+hMxzn3LxxMH2SkNGXWaRRxxjdxTAjXvjjEQ1JfMdY2U+AimOdAo59Nvap8afz+4L4lEdMm19zH647ygC6HJJK/2w4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787716538; c=relaxed/simple; bh=JyY6JGr+jPbcAP9NCmiZu8QgkqL+g/U8FWK9cX4+dgQ=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=uVYgWbsl2fBbItM9fHPqUyNj8J4Fs09nenHne0pXu5q8m1HhoYUVu2tlAdgL8MHlfGgxtCtT4tHJ2p5c1CtcLvKHh2dAaftUQMZmGE/QITiSZdlrjvRyIvJCR7e//rqvVLxow6iq0GwLaPEpWCrR/ce41BNupcbfaJoWg9GTQq0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=c7ddYzib; 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="c7ddYzib" Received: by smtp.kernel.org (Postfix) with ESMTPS id 049ACC2BCF6 for ; Wed, 26 Aug 2026 03:55:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1787716538; bh=JyY6JGr+jPbcAP9NCmiZu8QgkqL+g/U8FWK9cX4+dgQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=c7ddYzibAkm8ixV1QoGvv+jnez0E5evRudq+pCKWZPkgjDYewcn7w5KdEigIMnUiB Urw7Rz02+pr3u6O7mWB8v4Xij9tvUF2OHrQZjAJw+B/NyEFUb/CjoKU8rs+AzxrwZZ cWInRiZoWEkQAOGXJiB0TYmIWQGsj+UoFSe59OX8QyFhkThHaYKBJ/kIO1NG6ISjY2 FCU2yrj7BGoJStHR8SP6049OUxEkCVBhA8x2w7XVcf65DwI4BNGQs+xwScz/W69c6L 7cChVZH3ZcpR81adMESF6jq/rHSqn0E3SlWOG8bJlH2vE/g4M09n7Odi5zrIPLQNn7 mjTy/LQ9/DMtw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id D5B4AC41613; Wed, 26 Aug 2026 03:55:37 +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: Wed, 26 Aug 2026 03:55:37 +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: 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 --- Comment #3 from Wei Huang (huangwei@kylinos.cn) --- Hi Alstergee, Thanks for the detailed DMI info - and for the note about the AMD sibling (83RU). I've kept the quirk to 83F5 for now, since the failure is only confirmed on your model; 83RU can be added once someone confirms it there. A patch has been submitted to the linux-usb mailing list: usb: typec: ucsi: do not register UCSI on Lenovo Legion Pro 7 16IAX10H =20=20=20 https://lore.kernel.org/linux-usb/20260826034658.2170407-1-huangwei@kylinos= .cn/ It adds a DMI quirk that makes ucsi_acpi skip binding on this model, which is functionally the same as the blacklist workaround you already verified - the module can stay loaded, but it will not touch the EC's UCSI mailbox. If you have a chance to test it (build a kernel with the patch applied, make sure ucsi_acpi is no longer blacklisted, and reboot), the confirmation I'd need is: - a dmesg line like: ucsi_acpi USBC000:00: UCSI implementation in firmware is broken, ignoring - normal PD charging restored (voltage_now non-zero, chargers hold). If that works, it would help to have a formal Tested-by tag from you, which lets the subsystem maintainer pick the fix up directly. Just reply with: Tested-by: Alex Bartz Thanks again for the quick and thorough help! --=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.=