I have a laptop that has USB 3.0 ports only and my portable HD doesn't work on it. I have a desktop that runs the same version of Kubuntu and same kernel version but has USB 2.0 ports, the portable drive works fine there.
Portable Drive: Western Digital My Passport 1.0 TB
Kubuntu Version: quantal 12.10
Kernel Version: 3.5.0-17-generic
When I use
lsusb right after connecting the portable drive, it is read. After 10 seconds it disappears.
fdisk -l doesn't see the drive at all.
Please note that I have installed
ntfs-config and blacklisted
UPDATE: I plugged a USB 1.0 hub into the laptop and connected the Portable HDD through it, it worked. But the Portable HDD still doesn't work when connected to the laptop USB 3.0 port directly.