So you normally have psmouse loaded? Run this command: lsmod | grep psmouse
Generally, this is force loaded via an entry in /etc/modules, which is added there from installer. I suspect you are just missing psmouse as a module, and that connecting the USBPS2 adapter is causing the module to be autoloaded. If it is not present in /etc/modules, then add it there. Rejecting the bug report. Please set the status to Confirmed if this is not the case. ** Changed in: linux-source-2.6.15 (Ubuntu) Status: Needs Info => Rejected -- original HP keybord bundled with HP dc7600 doesn't work https://launchpad.net/bugs/52546 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs