From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (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 381263955CF; Wed, 13 May 2026 04:55:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778648128; cv=none; b=jWRlMMOxT4XXdsD9bB8ilDkJo2egzRJJMXS+NgSrnR3l3ffZxEp8RsPiyoBt2aih26FLQk8/N3M7T/9jhKj8dU1qkiEzXSB/0DRC7WoUO8fnjbcUjuGFdiwGRvCzjPG7y/9sj4yVR4JjSYInM/2rhvyvXWahF5CSHN1ZJ+VZ23Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778648128; c=relaxed/simple; bh=c2xTnTzkyzBGw2ozDRDzC6y/qz/0wJKDkOMCKy4LZJs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mfHwZ7X5O7QqQ7mJ3pzM80FpZXS/c80Ipae+AJ+CxOVJL/xDhR702St4mO9L4QHhOXNFuInH4pEQHQAGw39qsBcU+3BN76//m4bZvBR/GFEX7IY/dpPPkms8OTpH9mMD5A9JIBn8xzZUDwnECmwyMzPf1myBZ5MeF7WregjdHTs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=l4ST8cDo; arc=none smtp.client-ip=192.198.163.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="l4ST8cDo" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1778648126; x=1810184126; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=c2xTnTzkyzBGw2ozDRDzC6y/qz/0wJKDkOMCKy4LZJs=; b=l4ST8cDoVYNlr09mhqW78vB3pECRHAWoutl4mztDkSHKLw0rPTcUwQYl P8b/v/EFs3uWFj7FbxX5iFa2DRCQt2NEZLRYjbkIKhi1uupDcCJan+6cQ ZiB/GHrDPH90pJb6N9I49AjwML9T/XtLrhviFHoyrTRGWCIoHeGGYGojm D66RL/XcQX5Z4KXtKQNZ8p3mi29F8VXQQZliGI4xWAxHhC2V8mvLhxB0v 6nR7tu2tWfvZOqA02d6LRy7L8AdG8bH+MxPFFKOIYDypNBNGgy44ka49B N4Mjj7cyKj2XKhGTYZ6gwab0HF9jMnutpvSNTiNgcEr4AbEJR9nqq5ymK Q==; X-CSE-ConnectionGUID: kHD6yRbHSHarN4zx9ok78w== X-CSE-MsgGUID: duhmR6Z+RE6k4PQCjA01fQ== X-IronPort-AV: E=McAfee;i="6800,10657,11784"; a="67096195" X-IronPort-AV: E=Sophos;i="6.23,232,1770624000"; d="scan'208";a="67096195" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 May 2026 21:55:24 -0700 X-CSE-ConnectionGUID: GF/zgovUQPS73lh5i0rZaA== X-CSE-MsgGUID: 8z8lBThQS+e48YzOt9t5aQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,232,1770624000"; d="scan'208";a="268313952" Received: from black.igk.intel.com ([10.91.253.5]) by orviesa002.jf.intel.com with ESMTP; 12 May 2026 21:55:21 -0700 Received: by black.igk.intel.com (Postfix, from userid 1001) id 74F9695; Wed, 13 May 2026 06:55:20 +0200 (CEST) Date: Wed, 13 May 2026 06:55:20 +0200 From: Mika Westerberg To: Odoben Cc: Wolfram Sang , Niels Franke , westeri@kernel.org, linux-i2c@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] i2c: acpi: Add ELAN0678 to i2c_acpi_force_100khz_device_ids Message-ID: <20260513045520.GF84797@black.igk.intel.com> References: <20260418053719.15766-1-nielsfranke@gmail.com> <1453fe0d-230c-4655-93ad-3f685b8ab713@flipperpa.ws> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1453fe0d-230c-4655-93ad-3f685b8ab713@flipperpa.ws> Hi, On Tue, May 12, 2026 at 11:36:26PM +0200, Odoben wrote: > Hi, > > I have what appears to be the same issue on a ThinkPad X13 Gen 2 with > Intel i5-1145G7, but with ACPI HID ELAN0676 instead of ELAN0678. > > The touchpad is: > > ELAN0676:00 04F3:3195 Touchpad > > libinput reports: > > Id: i2c:04f3:3195 > > dmesg shows: > > i2c_designware.0 -> i2c-ELAN0676:00 -> hid-multitouch > > The ACPI table contains: > > Package (0x06) > { > 0x04F3, > 0x3195, > 0x15, > One, > One, > "ELAN0676" > } > > and the surrounding firmware logic maps the fifth field to speed: > > Local5 == Zero -> SPED = 0x000186A0 = 100 kHz > Local5 == One -> SPED = 0x00061A80 = 400 kHz > > So this machine also configures the 04F3:3195 ELAN touchpad at 400 kHz. The > symptom is very frequent rubbery/sluggish pointer movement, consistent with > the excessive smoothing described for ELAN0678. > > Would it make sense to include ELAN0676 in the > same i2c_acpi_force_100khz_device_ids quirk? Did you try 100Hz and it made the problem go away? In that case yes it makes sense to add the quirk.