Comment 3 for bug 114762

Thanks for your bug report.

At this moment the xserver-xorg debconf template always manually configures a mouse with these options in /etc/X11/xorg.conf:
       Option "Device" "/dev/input/mice"
       Option "Protocol" "ImPS/2"

Normally Xorg should be able to autodetect the protocol of a PS/2 or USB
mouse using /dev/input/mice by putting protocol to "auto", can you try
this.

Please provide the following information:
1. How is your mouse connected to your PC: serial, PS/2, USB, USB wireless, ...
 For a USB mouse include the relevant output of the command lsusb on a terminal.
 What mechanism does your mouse use: ball mouse, optical, trackball, ...
 How many physical buttons and scrollwheels does you mouse have?
2. Open /etc/X11/xorg.conf and change the mouse protocol to:
      Option "Protocol" "auto"
3. Restart X with Ctrl-Alt-Backspace.
4. Open a terminal and enter the following commands:
  $ xmodmap -pp > ~/xmodmap-pp
  $ xev | grep button
 Put the mouse cursor into the rectangle and push your mouse buttons. Tell us which button number is reported, e.g. left = 1, scrollwheel up = 4, thumb button = 8, ...
5. Attach your /var/log/Xorg.0.log and ~/xmodmap-pp to this bug report.