DebuggingTouchpadDetection

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 1. The scrolling features of your touchpad don't work.  1. Some features of your touchpad like scrolling, tapping, dragging don't work (as expected).
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= How to file a bug report =
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##Before filing a bug please check the list of [#knownbugs known bugs] at the end of this document.

Touchpad related bugs should initially be filed against '''xserver-xorg-input-synaptics'''.
If the bug turns out to be a kernel bug or a bug in another package, bug triagers can assign the bug additionally to that package and mark the xserver-xorg-input-synaptics task as invalid.

[[Anchor(generalinfo)]]		 <<Anchor(generalinfo)>>
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 1. What brand and model is your laptop and other hardware details, open a terminal/console and enter the following command: {{{
$ sudo dmidecode > ~/dmidecode }}} What scrolling features does your touchpad have: only horizontal or horizontal and vertical?		  1. What brand and model is your laptop, open a terminal/console and enter the following command: {{{
$ cd /var/lib/acpi-support/; grep '.' *-* > ~/laptop }}} What features does your touchpad have: horizontal and vertical scrolling, tapping, dragging, ...
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 1. Attach {{{~/dmidecode}}}, {{{~/uname-a}}}, {{{~/version_signature}}} and {{{~/lspci-vvnn}}} to the bug report as seperate attachments.  1. If using Ubuntu 8.10 or later, run {{{ $ lshal > ~/lshal }}} and attach {{{~/lshal}}}.
 1. Attach {{{~/laptop}}}, {{{~/uname-a}}}, {{{~/version_signature}}} and {{{~/lspci-vvnn}}} to the bug report as separate attachments.
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 1. Provide the [#generalinfo general information].  1. File the bug against '''linux'''
 1. Provide the [[#generalinfo|general information]].
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 1. Attach {{{~/dmesg}}} and your {{{/var/log/Xorg.0.log}}} to the bug report in seperate attachments.  1. Attach {{{~/dmesg}}} and your {{{/var/log/Xorg.0.log}}} to the bug report in separate attachments.
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 1. Provide the [#generalinfo general information].  1. Provide the [[#generalinfo|general information]].
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== In case the scrolling features of your touchpad don't work == == In case some features of your touchpad like scrolling, tapping, dragging don't work (as expected) ==
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 1. Provide the [#generalinfo general information].
 1. Open a terminal and enter the following command: {{{		  1. File bug against '''xserver-xorg-input-synaptics'''
 1. Provide the [[#generalinfo|general information]].
 1. Open a terminal and enter the following commands: {{{
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 1. Attach {{{~/devices}}}, {{{~/dmesg}}} and your {{{/var/log/Xorg.0.log}}} to the bug report in seperate attachments.  1. Attach your {{{/var/log/Xorg.0.log}}}, {{{~/devices}}} and {{{~/dmesg}}} to the bug report in separate attachments.
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= Also see =

 * DebuggingProcedures
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CategoryBugSquad CategoryBugSquad CategoryDebugging

Debugging Central

This page is part of the debugging series — pages with debugging details for a variety of Ubuntu packages.

Introduction

Problems with touchpad detection typically fall into one off these categories:

  1. Your touchpad doesn't work at all.
  2. Your touchpad stops working after a while.
  3. Some features of your touchpad like scrolling, tapping, dragging don't work (as expected).

General information

For all bug categories the following general information should be provided:

  1. What brand and model is your laptop, open a terminal/console and enter the following command: 

    $ cd /var/lib/acpi-support/; grep '.' *-* > ~/laptop
    What features does your touchpad have: horizontal and vertical scrolling, tapping, dragging, ...

  2. Open a terminal/console and enter the following commands (minimal information as described in KernelTeamBugPolicies): 

    $ uname -a > ~/uname-a
$ cat /proc/version_signature > ~/version_signature
$ sudo lspci -vvnn > ~/lspci-vvnn

  3. If using Ubuntu 8.10 or later, run  $ lshal > ~/lshal  and attach ~/lshal.

  4. Attach ~/laptop, ~/uname-a, ~/version_signature and ~/lspci-vvnn to the bug report as separate attachments.

In case your touchpad doesn't work at all

  1. File the bug against linux

  2. Provide the general information.

  3. Enter the following command in a terminal/console: 

    $ dmesg > ~/dmesg

  4. Attach ~/dmesg and your /var/log/Xorg.0.log to the bug report in separate attachments.

In case your touchpad stops working after a while

  1. Provide the general information.

  2. Direct after logging in to GNOME, KDE or Xfce open a terminal and enter the following commands: 

    $ dmesg > ~/dmesg_boot
$ cp /var/log/Xorg.0.log ~/Xorg.0.log
  3. Wait until your touchpad stops working.
  4. Open a Virtual Terminal by pressing Ctrl-Alt-F1.

  5. Enter the following commands: 

    $ LANG=C
$ dmesg > ~/dmesg
$ diff -ns ~/dmesg_boot ~/dmesg > ~/dmesg_diff
$ cp /var/log/Xorg.0.log ~/Xorg.0.log_tmp
$ diff -ns ~/Xorg.0.log ~/Xorg.0.log_tmp > ~/Xorg.0.log_diff

  6. Attach ~/dmesg_boot, ~/dmesg_diff, ~/Xorg.0.log and ~/Xorg.0.log_diff to the bug report in separate attachments.

In case some features of your touchpad like scrolling, tapping, dragging don't work (as expected)

  1. File bug against xserver-xorg-input-synaptics

  2. Provide the general information.

  3. Open a terminal and enter the following commands: 

    $ cat /proc/bus/input/devices > ~/devices
$ dmesg > ~/dmesg

  4. Attach your /var/log/Xorg.0.log, ~/devices and ~/dmesg to the bug report in separate attachments.

CategoryBugSquad CategoryDebugging

DebuggingTouchpadDetection (last edited 2019-02-26 09:05:55 by anthonywong)