I have this problem too with my WD passport external USB 3 HDD and USB 3 port of my Dell Inspiron 15 (2521)
i.e. the (USB 3) HDD is not recognized when plugged in USB 3 ports However USB 2 device device work fine on the USB 3 ports. Only USB 3 device are not recognized. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1242321 Title: USB 3.0 Harddrive not recognised To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1242321/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs