Comment 9 for bug 23346

(In reply to comment #6)
> (In reply to comment #5)
> > If possible, please upgrade to Dapper's 2.6.15-7 kernel. If you do not want to
> > upgrade to Dapper, then you can also wait for the Dapper Flight 2 CD's, which
> > are due out within the next few days.
> >
> > Let me know if this bug still exists with this kernel.
>
> I've just tested with the Dapper Flight 2 live CD and it looks like the bug
> still exists.

Dapper is showing a completely different problem for you (oopses)

Try disabling the ehci_hcd by doing:

echo blacklist ehci_hcd > /etc/modprobe.d/blacklist.ehci
update-initramfs -u

Then reboot. The drive will be slower, but it should work.