I've 'fixed' this by changing the 'policy_battery' from 'ondemand' to 'powersave'. If you're still interested in debugging this further, please let me know. File requested is attached.
Thank you, Joss ** Attachment added: "gpm.log" http://launchpadlibrarian.net/18582633/gpm.log -- CPU scheduling causes temporary freeze when unplugged from AC https://bugs.launchpad.net/bugs/248893 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
