It appears a bug existed but was fixed. Check this duplicate issue.
You can also use the resource posted in the Ubuntu Wiki.
If you have a 2-button mouse and need middle-mouse emulation, here are the steps to follow to request adding a quirk for your hardware:
- Create a file named /usr/share/X11/xorg.conf.d/middle-mouse-button.conf with the following contents:
Identifier "middle button emulation class"
Option "Emulate3Buttons" "on"
- If you use GNOME 3 or Unity, an additional step is needed. Execute the following command
gsettings set org.gnome.settings-daemon.peripherals.mouse middle-button-enabled true
Otherwise, GNOME 3's settings will override X's.
Restart X, and verify this works.
File a bug with the title "Quirk for 2-button mouse ", like this:
- Attach to the bug report the output of 'sudo lsinput' and 'sudo dmidecode'