Well, the stack trace looks similar, but not identical. As some additional information, this happened to me on Ubuntu Desktop 12.04. This trace seems to indicate that the Keyspan USB serial device was closed right before the panic.
** Attachment added: "Picture of stack trace" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/1018241/+attachment/3679967/+files/IMG-20130517-00186.jpg -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-input-evdev in Ubuntu. https://bugs.launchpad.net/bugs/1018241 Title: Kernel panic with ppp and keyspan usa-19hs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/1018241/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
