From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brad Baker Subject: Goodix touchscreen works intermittently, fails reading config info. Date: Sat, 10 Sep 2016 18:21:07 -0300 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: Received: from mail-qt0-f170.google.com ([209.85.216.170]:35793 "EHLO mail-qt0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753141AbcIJVVJ (ORCPT ); Sat, 10 Sep 2016 17:21:09 -0400 Received: by mail-qt0-f170.google.com with SMTP id 93so56955357qtg.2 for ; Sat, 10 Sep 2016 14:21:08 -0700 (PDT) Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: bastien nocera Cc: linux-input@vger.kernel.org Summary: Goodix touchscreen works intermittently, fails reading config info. https://bugzilla.kernel.org/show_bug.cgi?id=156511 Description: Chuwi Hi12 tablet with Intel cherry-trail Atom Z8300, the touchscreen does work after bootup most of the time, but sometimes it does not work without running modprobe. When it fails the dmesg log shows the error "Invalid config, using defaults" and when it works this error is not present. Module: goodix, goodix_backport Linux version 4.8.0-040800rc5-generic (kernel@tangerine) (gcc version 6.2.0 20160830 (Ubuntu 6.2.0-2ubuntu11) ) #201609041832 SMP Sun Sep 4 22:34:01 UTC 2016 dmesg log when it's failing: [ 10.012314] Goodix-TS i2c-GDIX1001:00: ID 9111, version: 1060 [ 10.017711] Goodix-TS i2c-GDIX1001:00: Invalid config, using defaults [ 10.018021] input: Goodix Capacitive TouchScreen as /devices/pci0000:00/808622C1:05/i2c-13/i2c-GDIX1001:00/input/input6 details given in bugzilla #156511