Introduction

If you have a laptop and your touchpad is not detected please follow the steps described here: DebuggingTouchpadDetection.

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

1. Your mouse doesn't work at all.
2. Your mouse stops working after a while.
3. Some mouse buttons/scrollwheel don't work (as expected).

How to file a bug report

Before filing a bug please check the list of [#knownbugs known bugs] at the end of this document.

Mouse related bugs should initially be filed against xserver-xorg-input-mouse. 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-mouse task as invalid.

Anchor(generalinfo)

General information

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

1. What brand and model is your mouse.BRHow is your mouse connected to your PC: serial, PS/2, USB, USB wireless, ...BRWhat mechanism does your mouse use: ball mouse, optical, trackball, ...BRHow many physical buttons and scrollwheels does you mouse have?

2. For a USB mouse enter the following command on a terminal/console:

   $ lsusb -v > ~/lsusb-v 

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

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

4. Attach ~/lsusb-v, ~/uname-a, ~/version and ~/lspci-vvnn to the bug report as seperate attachments.

In case your mouse is not detected at all

1. Provide the [#generalinfo general information].
2. If you have a PS/2 mouse make sure it was connected before booting Ubuntu, if you have a USB mouse unplug it and replug it to see if it starts working.

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

   $ dmesg > ~/dmesg 

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

In case your mouse stops working after a while

1. Provide the [#generalinfo 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 mouse stops working. If you have a USB mouse unplug it an replug it to see if it starts working again.
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 mouse buttons/scrollwheel don't work (as expected)

1. Provide the [#generalinfo general information].

2. Open a terminal and enter the following commands:

   $ xmodmap -pp > ~/xmodmap-pp
   $ xev | grep -i button 

   Put the mouse cursor into the rectangle and push your mouse buttons. Mention in the bug report which button number is reported, e.g. left = 1, scrollwheel up = 4, horizontal scrollwheel left = 6, thumb button = 8, pinkie button = 9, ...

3. Attach your /var/log/Xorg.0.log and ~/xmodmap-pp to the bug report in seperate attachments.

Anchor(knownbugs)

Known bugs

Description of known issues, how to recognise them and stock responses/actions.

Open

Also see

• DebuggingProcedures

CategoryBugSquad