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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 882A9C47082 for ; Wed, 26 May 2021 17:08:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60C6C61184 for ; Wed, 26 May 2021 17:08:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234038AbhEZRKC (ORCPT ); Wed, 26 May 2021 13:10:02 -0400 Received: from confino.investici.org ([212.103.72.250]:32041 "EHLO confino.investici.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233955AbhEZRKB (ORCPT ); Wed, 26 May 2021 13:10:01 -0400 X-Greylist: delayed 419 seconds by postgrey-1.27 at vger.kernel.org; Wed, 26 May 2021 13:10:01 EDT Received: from mx1.investici.org (unknown [127.0.0.1]) by confino.investici.org (Postfix) with ESMTP id 4Fqy094hb5z10vC for ; Wed, 26 May 2021 17:01:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=autistici.org; s=stigmate; t=1622048489; bh=bLruLpmQOuAMRBQjh4mfDVoQQZmjHxD5mSXlyddpj+Y=; h=From:To:Subject:Date:From; b=OV+Q6DsZtSSa2WFieOJ9q1SEuuPUKxmNE6bPlmrYFxqyDCfznbeMC2aW0f18eLGOv Kci0+g9uGcqP4QNj/Xn41RZbPISL2FACXj7hnMVmyN8k631iVLc7VJ73HRpRlxLt+2 UD9Hrn88V56qWxofNuOQ7BIHy8o4EDElM9SPGCDw= Received: from [212.103.72.250] (mx1.investici.org [212.103.72.250]) (Authenticated sender: andrea.monaco@autistici.org) by localhost (Postfix) with ESMTPSA id 4Fqy093zHGz10v7 for ; Wed, 26 May 2021 17:01:29 +0000 (UTC) From: "Andrea G. Monaco" To: linux-input@vger.kernel.org Subject: Acer laptop, SYN1B7F Synaptics touchpad gets wild sometimes Date: Wed, 26 May 2021 19:01:28 +0200 Message-ID: <87mtshfmzb.fsf@autistici.org> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Hello, on Acer laptop, my SYN1B7F Synaptics touchpad quite often starts acting wild, moving and clicking and scrolling on its own. It uses HID over I2C interface. The kernel is 4.19.0 on Debian. This is an example of the evtest output in those moments, while I didn't touch the pad at all: Event: time 1622047857.609072, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42932700 Event: time 1622047857.609072, -------------- SYN_REPORT ------------ Event: time 1622047857.616372, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42939900 Event: time 1622047857.616372, -------------- SYN_REPORT ------------ Event: time 1622047857.623630, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42947100 Event: time 1622047857.623630, -------------- SYN_REPORT ------------ Event: time 1622047857.630933, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42954300 Event: time 1622047857.630933, -------------- SYN_REPORT ------------ Event: time 1622047857.638218, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42961500 Event: time 1622047857.638218, -------------- SYN_REPORT ------------ Event: time 1622047857.645786, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 489 Event: time 1622047857.645786, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 215 Event: time 1622047857.645786, type 3 (EV_ABS), code 0 (ABS_X), value 489 Event: time 1622047857.645786, type 3 (EV_ABS), code 1 (ABS_Y), value 215 Event: time 1622047857.645786, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42968700 Event: time 1622047857.645786, -------------- SYN_REPORT ------------ Event: time 1622047857.653065, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42975900 Event: time 1622047857.653065, -------------- SYN_REPORT ------------ Event: time 1622047857.660063, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 498 Event: time 1622047857.660063, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 181 Event: time 1622047857.660063, type 3 (EV_ABS), code 0 (ABS_X), value 498 Event: time 1622047857.660063, type 3 (EV_ABS), code 1 (ABS_Y), value 181 Event: time 1622047857.660063, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42983100 Event: time 1622047857.660063, -------------- SYN_REPORT ------------ Event: time 1622047857.667358, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 182 Event: time 1622047857.667358, type 3 (EV_ABS), code 1 (ABS_Y), value 182 Event: time 1622047857.667358, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 42990300 Event: time 1622047857.667358, -------------- SYN_REPORT ------------ I also noted that lots of those lonely MSC_TIMESTAMPs get emitted when the touchpad works fine too. Is this expected behavior? I would appreciate any pointer or feedback to help me work on it. Andrea Monaco