[ubuntu] No USB ports working

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http://ubuntuforums.org – I have Ubuntu 9.10 and a compaq presario sr1630wm desktop. I installed Ubuntu to the HD while the HD was in another computer and everything worked fine, but then i unplugged the HD and put it in the Compaq and now USB ports wont work I have read a couple threads and i think my issue is that i have an SB400 controller. i ran some commands and they dont all make sense to me but here they are: Code: chirag@chirag-desktop:~$ lspci -v 00:00.0 Host bridge: ATI Technologies Inc RS480 Host Bridge (rev 10)     Subsystem: Hewlett-Packard Co (Hardware)