After a fuck-tonne of Googling, I have a temporary workaround: sudo rmmod psmouse sudo modprobe psmouse
Simply unloading and reloading the mouse kernel module fixes the problem. This seems to be a kernel driver bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1276960 Title: Ubuntu 13.10 upgrade broke click-and-drag To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1276960/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs