I've tried with the kernel you supposed. The problem persists, the external hdd is not auto-mounted.
Part of dmesg: [ 254.776764] xhci_hcd 0000:03:00.0: Timeout while waiting for address device command [ 274.974366] xhci_hcd 0000:03:00.0: Timeout while waiting for address device command [ 275.178297] usb 4-1: device not accepting address 2, error -62 [ 295.171938] xhci_hcd 0000:03:00.0: Timeout while waiting for a slot [ 295.171945] hub 4-0:1.0: couldn't allocate port 1 usb_device [ 315.421546] xhci_hcd 0000:03:00.0: Timeout while waiting for a slot [ 315.421553] hub 3-0:1.0: couldn't allocate port 1 usb_device I now get this timout again like it's mentioned in Bug #775543 $ lsusb Bus 002 Device 003: ID 05af:0408 Jing-Mold Enterprise Co., Ltd Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1031982 Title: 174c:5106 USB 3.0 port does not work with external hard disk To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1031982/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
