just installed 13.10 on my HP Envy M6 laptop and have no mouse pointer. My USB mouse does not work and neither does the track pad. When I booted from a USB key everything worked OK but once installed it seems to have broken the mouse. Unlike other posts, there is no flicker, it simply doesn't work at all. My laptop is an i5 with 6gb and dual Intel and AMD radeon graphics. Any help would be gratefully received as I really can't stand Windows 8 any longer. Thanks.
sorry for previously posting an answer without actually answering - I would have made it a comment to the question, but either this feature is disabled here on askubuntu.com or I don't have the permission to comment on questions..
But now I've got a real answer, at least one that worked for me (on my Dell Inspiron 1520):