I have a Thinkpad T61, with the trackpad mouse key and an external USB mouse i'm experiencing the same problem. (Touchpad click and touchpad keys are working fine).
Running: DISTRIB_ID=Ubuntu DISTRIB_RELEASE=8.04 DISTRIB_CODENAME=hardy DISTRIB_DESCRIPTION="Ubuntu hardy (development branch)" Alpha 4... Xorg version: ii xorg 1:7.3+10ubuntu X.Org X Window System -- [Hardy] External mouse on laptop will only double-click https://bugs.launchpad.net/bugs/188351 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