From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DEA1FC65BAF for ; Wed, 12 Dec 2018 14:25:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AB3A220880 for ; Wed, 12 Dec 2018 14:25:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AB3A220880 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727731AbeLLOZv convert rfc822-to-8bit (ORCPT ); Wed, 12 Dec 2018 09:25:51 -0500 Received: from mail-qt1-f180.google.com ([209.85.160.180]:46458 "EHLO mail-qt1-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726440AbeLLOZv (ORCPT ); Wed, 12 Dec 2018 09:25:51 -0500 Received: by mail-qt1-f180.google.com with SMTP id y20so20583163qtm.13 for ; Wed, 12 Dec 2018 06:25:50 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=vU/yUexu1CsHnx9wDhHHrayCuiSjyGBloT6TQP9FbVk=; b=KcHtl6+2maq/ZFPaoHnECIAtzP+TPgBO/wlGF0OvYnsnJufQvalHWg+8Bd5STi2pQb bSSU0en7oz74eA0QaoLANxqEl3TbKcdI04U1i3j2QsgPvw2VgLfnzqrJ1CrcKC+JmXdE fNnpnBNrTOa7kuYqOgU6RZ/t0VQmDGHkHVZzT3TFP5tIQlG+uQqaEyhqsNxYvXD3z8f/ rYff7yFbEo5pdtuleDIlpF6hzHEDNAuH1uc2HHY5B32XGaqmctEuj+S6az+0FUeqfuuq jKGZpw3I4KIPu3erZ5e0Vrf7BjcEwcYzuuhaG1WP9TGOyLay72OP6mddZc6n28Elvula /quQ== X-Gm-Message-State: AA+aEWabcEO4Jztka70KjtI4Xw/QBpJrV4TCOllonZgoZRaHaQZNx5mj nJtUs/f+o31CKAV6qaFP5QtiS3XowXozCTZc+P1BJQ== X-Google-Smtp-Source: AFSGD/WXfuCUEfWqknXmsM60n1B5YobrcTaG6qOD86cJil93TDSiiV1llPknDe4z1E5VxohnENV17SiiM/6lsIqYLoE= X-Received: by 2002:a0c:96c9:: with SMTP id b9mr18479485qvd.238.1544624750166; Wed, 12 Dec 2018 06:25:50 -0800 (PST) MIME-Version: 1.0 References: <6E2F161C-046B-4D5F-B831-B1308A554C40@canonical.com> In-Reply-To: <6E2F161C-046B-4D5F-B831-B1308A554C40@canonical.com> From: Benjamin Tissoires Date: Wed, 12 Dec 2018 15:25:38 +0100 Message-ID: Subject: Re: Elantech SMBus support regression To: Kai Heng Feng , Dmitry Torokhov Cc: "open list:HID CORE LAYER" , lkml Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, sorry for the late reply. I was always meaning to fix this the proper way but couldn't dedicate a full day of work to go to the bottom of elan_i2c. Meanwhile, I am thinking at simply having a blacklist of devices that we know are not working well (P52, L480, L580 and P72). Could you get the value of /sys/bus/serio/devices/serio1/firmware_id from all of these laptops? I know the P52 is LEN2131, but I don't seem to find the other PNPIds. Cheers, Benjamin On Thu, Nov 22, 2018 at 5:22 AM Kai Heng Feng wrote: > > Hi Benjamin, > > It appears the Elantech SMBus support breaks some users’ touchpad. > > Please have a look at [1] [2], thanks! > > [1] https://bugs.launchpad.net/bugs/1803600 > [2] https://bugs.archlinux.org/task/59714 > > Kai-Heng