Per penalvch's recommendation : Installed latest upstream kernel http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7-rc6-yakkety/ and booted. Still exhibits bug dmesg :
[ 28.340550] usb 2-1: new SuperSpeed USB device number 2 using xhci_hcd [ 28.362325] usb 2-1: New USB device found, idVendor=0bc2, idProduct=ab24 [ 28.362329] usb 2-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1 [ 28.362331] usb 2-1: Product: BUP Slim BK [ 28.362332] usb 2-1: Manufacturer: Seagate [ 28.362333] usb 2-1: SerialNumber: NA7LYM08 I also tried enabling uas from the modprobe.d/ blacklist.conf, per google searching. It gets further but still will not mount the drive I confirmed this behavior is consistent with with rc3 and 4.4.0-24. [ 88.574108] usb 2-1: new SuperSpeed USB device number 2 using xhci_hcd [ 88.595434] usb 2-1: New USB device found, idVendor=0bc2, idProduct=ab24 [ 88.595440] usb 2-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1 [ 88.595443] usb 2-1: Product: BUP Slim BK [ 88.595444] usb 2-1: Manufacturer: Seagate [ 88.595446] usb 2-1: SerialNumber: NA7LYM08 [ 88.626473] scsi host33: uas [ 88.626755] usbcore: registered new interface driver uas [ 88.628897] scsi 33:0:0:0: Direct-Access Seagate BUP Slim BK 0302 PQ: 0 ANSI: 6 [ 88.655532] sd 33:0:0:0: Attached scsi generic sg4 type 0 [ 88.656083] sd 33:0:0:0: [sdd] Spinning up disk... [ 89.682395] .ready [ 89.683600] sd 33:0:0:0: [sdd] 3907029167 512-byte logical blocks: (2.00 TB/1.82 TiB) [ 89.683605] sd 33:0:0:0: [sdd] 4096-byte physical blocks [ 90.882771] sd 33:0:0:0: [sdd] Write Protect is off [ 90.882779] sd 33:0:0:0: [sdd] Mode Sense: 4f 00 00 00 [ 90.883914] sd 33:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 90.885177] sd 33:0:0:0: tag#0 data cmplt err -71 uas-tag 1 inflight: CMD [ 90.885183] sd 33:0:0:0: tag#0 CDB: Inquiry 12 01 00 00 40 00 [ 121.937783] sd 33:0:0:0: tag#0 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD [ 121.937792] sd 33:0:0:0: tag#0 CDB: Inquiry 12 01 00 00 40 00 [ 121.937909] scsi host33: uas_eh_bus_reset_handler start [ 122.052871] usb 2-1: reset SuperSpeed USB device number 2 using xhci_hcd [ 122.194535] usb 2-1: device firmware changed [ 124.818870] usb usb2-port1: Could not disable after 2000 ms [ 124.819015] scsi host33: uas_post_reset: alloc streams error -19 after reset [ 124.819210] usb 2-1: USB disconnect, device number 2 [ 130.770888] EXT4-fs (sdc1): recovery complete [ 130.770993] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null) [ 132.966110] EXT4-fs (sdc3): mounted filesystem with ordered data mode. Opts: (null) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1591521 Title: Kernel Does not recognize some USB 3.0 hard drives Status in linux package in Ubuntu: Incomplete Bug description: Connecting USB 3.0 external drive does not mount seems to choke at kernel level dmesg shows incomplete loading, never gets a device assigned. look at usb 4-1 in dmesg Running on 16,04 latest on vmware fusion on an apple mac book pro, confirmed works correctly in ubuntu 14.04 on vm AND vanilla kernel 4.4.13, confirmed bug on different HW with kernel 4.4.10 imac arch linux bare metal ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-24-generic 4.4.0-24.43 ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10 Uname: Linux 4.4.0-24-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: john 1836 F.... pulseaudio CurrentDesktop: XFCE Date: Sat Jun 11 07:31:18 2016 HibernationDevice: RESUME=UUID=814c9f61-7a4e-43bf-8a22-32628d812842 InstallationDate: Installed on 2014-07-20 (691 days ago) InstallationMedia: Lubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) IwConfig: ens33 no wireless extensions. lo no wireless extensions. MachineType: VMware, Inc. VMware Virtual Platform ProcFB: 0 svgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-24-generic root=UUID=7828d00a-d744-4ecf-a5f4-9f6fe0006ff6 ro quiet splash RelatedPackageVersions: linux-restricted-modules-4.4.0-24-generic N/A linux-backports-modules-4.4.0-24-generic N/A linux-firmware 1.157 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-05-19 (22 days ago) dmi.bios.date: 07/02/2015 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: 6.00 dmi.board.name: 440BX Desktop Reference Platform dmi.board.vendor: Intel Corporation dmi.board.version: None dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 1 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd07/02/2015:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A: dmi.product.name: VMware Virtual Platform dmi.product.version: None dmi.sys.vendor: VMware, Inc. 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