When connecting a eternal usb dd Western Digital My Passport usb 3.0 dmesg shows the device is outlined, not ready after error recovery. Linux distro: Arch x64 Kernel: 3.11.2-1 Linux firmware: 20130903-1 Kmod: 15-1 Systemd: 207-5 Udisks2: 2.1.1-3 Udevil: 0.4.1-1 Dmesg: [ 1405.646775] usb 1-2: new high-speed USB device number 5 using xhci_hcd [ 1405.688101] usb-storage 1-2:1.0: USB Mass Storage device detected [ 1405.688445] scsi5 : usb-storage 1-2:1.0 [ 1427.738024] usb 1-2: reset high-speed USB device number 5 using xhci_hcd [ 1427.778025] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0100 [ 1427.778031] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0140 [ 1427.941242] usb 1-2: reset high-speed USB device number 5 using xhci_hcd [ 1427.981241] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0100 [ 1427.981246] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0140 [ 1434.141125] usb 1-2: reset high-speed USB device number 5 using xhci_hcd [ 1434.181127] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0100 [ 1434.181132] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0140 [ 1434.341019] usb 1-2: reset high-speed USB device number 5 using xhci_hcd [ 1434.381016] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0100 [ 1434.381021] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0140 [ 1434.544239] usb 1-2: reset high-speed USB device number 5 using xhci_hcd [ 1434.584255] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0100 [ 1434.584260] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801fd2b0140 [ 1434.584550] scsi 5:0:0:0: Device offlined - not ready after error recovery Lsusb -v: Bus 001 Device 004: ID 1058:0740 Western Digital Technologies, Inc. My Passport Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.10 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x1058 Western Digital Technologies, Inc. idProduct 0x0740 My Passport bcdDevice 10.19 iManufacturer 1 Western Digital iProduct 2 My Passport 0740 iSerial 5 575842314138313239363935 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 32 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 4 USB Mass Storage bmAttributes 0x80 (Bus Powered) MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 8 Mass Storage bInterfaceSubClass 6 SCSI bInterfaceProtocol 80 Bulk-Only iInterface 6 MSC Bulk-Only Transport Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Binary Object Store Descriptor: bLength 5 bDescriptorType 15 wTotalLength 22 bNumDeviceCaps 2 USB 2.0 Extension Device Capability: bLength 7 bDescriptorType 16 bDevCapabilityType 2 bmAttributes 0x00000002 Link Power Management (LPM) Supported SuperSpeed USB Device Capability: bLength 10 bDescriptorType 16 bDevCapabilityType 3 bmAttributes 0x00 wSpeedsSupported 0x000e Device can operate at Full Speed (12Mbps) Device can operate at High Speed (480Mbps) Device can operate at SuperSpeed (5Gbps) bFunctionalitySupport 1 Lowest fully-functional device speed is Full Speed (12Mbps) bU1DevExitLat 10 micro seconds bU2DevExitLat 32 micro seconds Device Status: 0x0000 (Bus Powered) Lspci -v: 00:14.0 USB controller: Intel Corporation Lynx Point-LP USB xHCI HC (rev 04) (prog-if 30 [XHCI]) Subsystem: Sony Corporation Device 90b6 Flags: bus master, medium devsel, latency 0, IRQ 56 Memory at f7f00000 (64-bit, non-prefetchable) [size=64K] Capabilities: [70] Power Management version 2 Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+ Kernel driver in use: xhci_hcd Kernel modules: xhci_hcd 00:1d.0 USB controller: Intel Corporation Lynx Point-LP USB EHCI #1 (rev 04) (prog-if 20 [EHCI]) Subsystem: Sony Corporation Device 90b6 Flags: bus master, medium devsel, latency 0, IRQ 23 Memory at f7f1b000 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 3 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci-pci Kernel modules: ehci_pci Lsmod xhci_hcd 91406 0 usbcore 177959 7 btusb,uvcvideo,usb_storage,ehci_hcd,ehci_pci,usbhid,xhci_hcd usb_common 1648 1 usbcore No UAS module Fdisk -l Disk /dev/sda: 128.0 GB, 128035676160 bytes, 250069680 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Identificador del disco: 0x0a756ec0 Disposit. Inicio Comienzo Fin Bloques Id Sistema /dev/sda1 1 4294967295 2147483647+ ee GPT It only detects the internal ssd. I'm using uefi at boot. Tried with kernel-lts 3.10.12 but got the same error. It gets detected in other non linux OSes and older kernels with bios at boot. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html