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 90BEC43E088 for ; Wed, 9 Sep 2026 23:06:56 +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=1788995217; cv=none; b=C5fFHFI2B2UzxP5zlwvrD6GhdkB/SwgmGplcDVyxVY6N7Cx3C8rRPplQ+jpb6+4IpbkBDmQRemN5LCwXyWmVOMywIozbLCX7PAxrBqqk1b7lLe+f+nFaMOMfbp6KgQ1V4yVgF00DXYYliur7YGQH+KpUJzfzBfJ+rRTxJVknNpE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788995217; c=relaxed/simple; bh=79eJRxI5tPmqoEztxr9gplhhMwjPme44MoJqHLTKtIw=; h=From:To:Subject:Date:Message-ID:Content-Type:MIME-Version; b=bsse4DrKt+IWjUQevfOI69+/+4IimjB01iozZz3LVqhznnztOkveBZpIIi2ZkwJ4UHB2Wjghfh+YhtWL14O5vDRuenJoMM5EsSrUQCxLb2VphS9DJwyeX3EqaAPwQRQcH0t/oD4TXp+Vbj9pi6kkyBmfVO+cl1gOAp/tm1Zd6tQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qoBQ0zul; 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="qoBQ0zul" Received: by smtp.kernel.org (Postfix) with ESMTPS id AE337C2BCF5 for ; Wed, 9 Sep 2026 23:06:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1788995216; bh=79eJRxI5tPmqoEztxr9gplhhMwjPme44MoJqHLTKtIw=; h=From:To:Subject:Date:From; b=qoBQ0zultZmsPEb4TSuUVoaFzZAK0BBEPskt05/sHdRKtJuNRbqLRIJtBXimp03dg 0xxEyAHR42cojrtRUDr4CsI82Tu75UZjaXyewxkBgLfqR1iiATpKKEGfYIP5F094hr ZkgULf/+HlhyfrJv5yip071ZYwMtgrW2PdCyJA/SX/B0vXh9fTMs6+YTsOO6XuYKSE Zork5mXqJy80x7te5yvNLjZdNKoMnM0XAV2RWnecHHJBbWa90tGZdMpVQG5T12//aQ Fw1Wdgw3RkpWK1udh8xra2Tb+svsZy55Jhhls7WSs4innynsAzLjHYi8GSQPZhmeaU SfDDqzn1gHaOA== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 868A7C3279F; Wed, 9 Sep 2026 23:06:56 +0000 (UTC) From: bugzilla-daemon@kernel.org To: platform-driver-x86@vger.kernel.org Subject: [Bug 221993] New: [ideapad-laptop] Missing driver support for IDEA2008 / Ambient Light Sensor on Yoga Slim 7 14AKP9 Date: Wed, 09 Sep 2026 23:06:56 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: AssignedTo drivers_platform_x86@kernel-bugs.osdl.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: Platform_x86 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: dadodasyra.pro@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_platform_x86@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter cf_regression attachments.created Message-ID: 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: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221993 Bug ID: 221993 Summary: [ideapad-laptop] Missing driver support for IDEA2008 / Ambient Light Sensor on Yoga Slim 7 14AKP9 Product: Drivers Version: 2.5 Hardware: AMD OS: Linux Status: NEW Severity: normal Priority: P3 Component: Platform_x86 Assignee: drivers_platform_x86@kernel-bugs.osdl.org Reporter: dadodasyra.pro@gmail.com Regression: No Created attachment 310826 --> https://bugzilla.kernel.org/attachment.cgi?id=3D310826&action=3Dedit Decompiled ACPI table Created attachment: SSDT2.dsl (Decompiled ACPI table) Hardware: Lenovo Yoga Slim 7 14AKP9 (MT: 83JY) OS: Fedora (Kernel 7.1.x) The Ambient Light Sensor (ALS) on this laptop model is currently completely non-functional on Linux. The sensor is not exposed via standard ACPI (_ALI) methods, nor is it routed through the AMD Sensor Fusion Hub / amd_pmf. (The amd-pmf TA session initializes cleanly with the correct firmware, but regis= ters no IIO devices). ACPI dumping reveals the sensor is gated behind proprietary Lenovo ACPI dev= ices that currently lack driver bindings in `ideapad-laptop`: - IDEA2008 (ITSD - Integrated Thermal/Sensor Device): _STA returns 0x0F. - IDEA2002 (LISD): _STA returns 0x00. In the attached `SSDT2.dsl`, IDEA2008 defines an interface directly to the Embedded Controller: Device (ITSD) { Name (_HID, "IDEA2008")=20 Method (_STA, 0, NotSerialized) { Return (0x0F) } } // ... OperationRegion (ECF2, EmbeddedControl, Zero, 0xFF) Field (ECF2, ByteAcc, Lock, Preserve) { Offset (0x00),=20 VCMD, 8,=20 VDAT, 8,=20 VSTA, 8 } Steps to reproduce: 1. Boot Linux on Lenovo Yoga Slim 7 14AKP9. 2. Observe that no ALS appears in /sys/bus/iio/devices/. 3. Check /sys/bus/acpi/devices/IDEA2008:00/status (returns 15). 4. No driver claims the device. Expected behavior: `ideapad-laptop` (or a dedicated sensor driver) should bind to IDEA2008, interface with the EC (VCMD/VDAT), and expose the ambient light readings to= the `iio` subsystem so userspace tools like iio-sensor-proxy can manage automat= ic screen brightness. I don't know much about drivers and new to linux environment on physical devices. This was mainly AI generated after many back and forth. I am available to test any patches or probe EC registers if maintainers can provide instructions. --=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.=