Somehow the bug is related to some kind of mice. I changed my mouse from a Targus one (see previous lsusb) to a Logitech G5 and the middle button works perfectly with it, whereas it's still unfunctionnal with the Targus ! I didn't change anything to my Xorg.conf and I hotplugged the Logitech without restarting X or the box.
Attached you'll find my lsusb -v output with that new mouse. Below the lsusb output : $ lsusb Bus 002 Device 001: ID 0000:0000 Bus 001 Device 006: ID 046d:c041 Logitech, Inc. Bus 001 Device 003: ID 06f8:c000 Guillemot Corp. Bus 001 Device 001: ID 0000:0000 ** Attachment added: "lsusb -v" http://librarian.launchpad.net/7127019/lsusb.out -- [Feisty] Middle click fails with no action https://bugs.launchpad.net/bugs/83571 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs