problem at start up

i upgraded from ubuntu 8.04 to 8.10 using this command from the terminal: update-manager -d

during the install i had an error for ubuntustudio (a package of sound programs) but it continued and finished successfully.

now when ever i reboot the pc it stucks for a while at the ubuntustudio splash-screen and then does something in the command line,testing hardware and stuff,that takes 2 min every time.
it says among others ...: [34.7654739] usb 5-1: string descriptor 0read error: -110

i removed this ubuntu studio but doesnt change anything
i have no brocken packages
(eventually i can log into ubuntu)

thanx for the understanding.......