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 5A131CA6F for ; Sat, 18 Oct 2025 01:38:05 +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=1760751487; cv=none; b=S8ZkiN4zUin2M9B6QkBS1UAauLZeJHHQQHRC1H6Wmwpu1HKipmTI6qxBlk0UVO7XT+rnEdqMlBVRN3q0o3SEo1POGpQGSJsA7UtGVKYm5zrTKn8NOTgPFc79xr/bPUUD+TDw1LumEqP/iIXHFsz5nxq25OYcbS5+IbsbF1nVCZo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760751487; c=relaxed/simple; bh=/ViPKXp7jKlDfNztsCVCeDvq4pSxmMoPgY6I9dhz548=; h=From:To:Subject:Date:Message-ID:Content-Type:MIME-Version; b=nuZSf2PxK0XU2vNHWiPKXpOf7bi/hgMR7YWD1n845uzUFPpEqL44XuE0SULBFu83bNX9i0SarGbbZV0CoJt5H2WX9YXG27Ag9ZgDPqt11l/x85Wlmcw/awsjzog0Qe+SLv4ApUPjaAayskpJ1Ty77lkSLCbQkvHZrTcdj2zGAqY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ywy9/Qlf; 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="Ywy9/Qlf" Received: by smtp.kernel.org (Postfix) with ESMTPS id A6FBCC4CEE7 for ; Sat, 18 Oct 2025 01:38:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760751485; bh=/ViPKXp7jKlDfNztsCVCeDvq4pSxmMoPgY6I9dhz548=; h=From:To:Subject:Date:From; b=Ywy9/QlfSWp4/2EoO1iWXagr/y7j2kwz6tivrf7AquFyvP3F+4Fi4n7t8+HUM+tKh BuwrJZ36PdsZPorRh4yvpEiSAbdgINUMWYX6mKx//FX7njSsxayh9oD7mkH/eyZR9T je63IOgA0+uCqYW8H4uFfQsnQ8jkWwqt820M+9KNRlgnmTOa2v4S2hoiYxZXgB/I5B 1bO7IFNxnGnVm8kzHXswzm+0Imu/9d+RaafenQEAf8CrFn4+w2KVEuYzfqSRPD0nP6 aqf1/Y5n4J2cM0HYpLBnfG1OaBJQfg2de8EUsTl+p73ox9lykqCIC3LKMUWVpSi7I7 VrmpRQokRu3Lw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 95A99C4160E; Sat, 18 Oct 2025 01:38:05 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-iio@vger.kernel.org Subject: [Bug 220678] New: XPS 9440 ALS value spikes Date: Sat, 18 Oct 2025 01:38:05 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: AssignedTo drivers_iio@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: IIO X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: boliverworK@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_iio@kernel-bugs.kernel.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 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: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D220678 Bug ID: 220678 Summary: XPS 9440 ALS value spikes Product: Drivers Version: 2.5 Hardware: Intel OS: Linux Status: NEW Severity: normal Priority: P3 Component: IIO Assignee: drivers_iio@kernel-bugs.kernel.org Reporter: boliverworK@gmail.com Regression: No # Dell XPS 9440: Ambient Light Sensor wildly incorrect values ## Summary Ambient light sensor reports increasingly erratic values over time, spiking from ~15 lux to millions. Worsens with uptime, clears on reboot - suggests driver state corruption. ## System Info - **Model**: Dell XPS 9440 - **OS**: Fedora-based (Project Bluefin) - **Kernel**: [INSERT: uname -r] - **Device**: `/sys/bus/iio/devices/iio:device0` (name: "als") - **Sensor Hub**: Intel ISH (hid-sensor-hub 001F:8087:0AC2) ## Problem Raw kernel values from `/sys/bus/iio/devices/iio:device0/in_illuminance_raw= `: ``` Normal: 15000 Spike: 1596251 Normal: 15000 Spike: 778328 ``` Progressively worsens without reboot. Scale factor constant at 0.001. ## Logs ``` iio-sensor-prox[1502]: Buffer '/dev/iio:device0' did not have data within 0= .5s iio-sensor-prox[1502]: Invalid bitmask entry for /sys/devices/LNXSYSTM:00/.../event7 ``` ## Verification Raw kernel IIO values spike (not just userspace). Bug is in ISH kernel driv= er. ## Impact Function key backlight and screen brightness flicker unpredictably. ## Workaround ```bash sudo systemctl mask iio-sensor-proxy ``` ## Notes Progressive degradation pattern suggests ISH driver state corruption or mem= ory leak. May affect other Dell XPS models with Intel ISH. --=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.=