From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.infinitelytimeless.tech (mail.infinitelytimeless.tech [51.161.9.54]) (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 17B6C375F87 for ; Wed, 4 Mar 2026 03:42:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=51.161.9.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772595739; cv=none; b=DKqSK6pa6oM5CDPXtqbAu5Ko9d8QiIO5tyO2ThVpU0kvePCEG4BC86zMSS9pXXlN4pO73A2bR7HnTY5LCRVK+kqHv7W3fpqeyX0zqtTdEgeIm2owKxzHDtrJ2Z/bAQNLpZRf8FeSJLkqDopvi1Vn1X912LYgGk3LUYF+p9Qn/xg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772595739; c=relaxed/simple; bh=neHeZyfMO9x4wJeECH1IjqdFrHeMRFecPU3DQIooK0E=; h=Message-ID:Date:MIME-Version:To:Cc:From:Subject:Content-Type; b=hNHXa4g6GQwmXm+iF7OS4Q16lcuXY0mX8E3SjeCq+tGeCVhn856b4cG/jGgMs2N4rZnOyrk3LvuRyjd4Mht+dV1EJ6ctuhPxZ1QQoNoRI6jt/TgDdhOBJ9bocX99yPiPyWcXINw9pMZqibrVj6L0PVRW/qJZNVq5OM/Zaakxiik= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=infinitelytimeless.tech; spf=pass smtp.mailfrom=infinitelytimeless.tech; dkim=pass (2048-bit key) header.d=infinitelytimeless.tech header.i=@infinitelytimeless.tech header.b=YalU8t6+; arc=none smtp.client-ip=51.161.9.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=infinitelytimeless.tech Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=infinitelytimeless.tech Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infinitelytimeless.tech header.i=@infinitelytimeless.tech header.b="YalU8t6+" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=infinitelytimeless.tech; s=dkim; t=1772594132; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=PiQakduKmvE19CsxAA4psYJmGjZhOFdykpupah/VQ1g=; b=YalU8t6+xInVHOeZvswVod1BVaV8tpODEZSjC2tridRz7llagjnc1//cnCj8OlKhIvnWqQ Lsvchirm+wA9Cd/ovNvP5YLrQTkfUnsJZ1TQ6qL+33aQ+xsuOxqfKtiUfXhCIXvUnW/GhK ZIc0lC9P6p78NavejvrGMwUe3zS8X6hEoIJu7jGduwIkSe8Rv0MUfL93Bm0kmVT9HGMRh7 FS8ZHLDbgOstOz20kvFspJko7XHaOt5Ae+UQevRZdFbHzu/rskjzgwERsNEcQiW0RQRSxk AHwM5teaZSmrCDTKC5mD/NXMNN0TEvlqYmUSVTKBaX0e6BrZmLD0XG7yb+PUfw== Received: by mail.infinitelytimeless.tech (OpenSMTPD) with ESMTPSA id ac70f29b (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Tue, 3 Mar 2026 22:15:32 -0500 (EST) Message-ID: <1015ded1-c3f2-4b0d-92b8-15f413d1242b@infinitelytimeless.tech> Date: Tue, 3 Mar 2026 19:15:03 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Betterbird (Linux) Content-Language: en-US To: linux-kernel@vger.kernel.org Cc: chrome-platform@lists.linux.dev From: Aaron Burton Subject: cros_ec_lpcs breaking sleep mode on HP Elite Dragonfly Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hello, I'm reaching out in regards to an issue I've been trying to troubleshoot running Fedora (6.18.13-200.fc43.x86_64) on a HP Elite Dragonfly Chromebook. I'm aware this is not relevant to ChromeOS, but I was hoping maybe I could get some insight on this sleep mode issue I've been experiencing. This affects basically every Linux distro I've tested thus far, where if I put this Chromebook to sleep, it will immediately wake up. dmesg output when attempting sleep mode: [ 1478.853982] PM: suspend entry (s2idle) [ 1478.876379] Filesystems sync: 0.022 seconds [ 1478.877848] Freezing user space processes [ 1478.885201] Freezing user space processes completed (elapsed 0.007 seconds) [ 1478.885217] OOM killer disabled. [ 1478.885220] Freezing remaining freezable tasks [ 1478.886503] Freezing remaining freezable tasks completed (elapsed 0.001 seconds) [ 1478.933986] PM: Some devices failed to suspend, or early wake event detected [ 1478.961519] PM: resume devices took 0.027 seconds [ 1478.961978] OOM killer enabled. [ 1478.961980] Restarting tasks: Starting [ 1478.963295] Restarting tasks: Done [ 1478.963339] random: crng reseeded on system resumption [ 1478.965350] PM: suspend exit I've tried troubleshooting via /proc/acpi/wakeup by disabling each device enabled one by one, then eventually everything listed, and putting it to sleep via systemctl suspend, the machine still wakes up instantly without any user input. I eventually stumbled across what was causing the issue and it's related to the cros_ec_lpcs kernel driver as unloading the driver allowed it to sleep properly, though this also has unwanted side effects like the power LED no longer working and some issues with USB-C ports. I'd like to find a proper fix for this Chromebook EC in the kernel driver, though I don't have much experience debugging low-level kernel drivers. I'd be more than happy to provide any debugging data to try to fix this issue if possible. Thanks Aaron