same problem here with an external usb hard disk. perfectly works under windows or after removing ehci_hcd (SLOW!). udev patch doesn't solve.
dmesg: usb 1-6: reset high speed USB device using ehci_hcd and address 3 usb 1-6: reset high speed USB device using ehci_hcd and address 3 usb 1-6: reset high speed USB device using ehci_hcd and address 3 usb 1-6: reset high speed USB device using ehci_hcd and address 3 usb 1-6: reset high speed USB device using ehci_hcd and address 3 usb 1-6: reset high speed USB device using ehci_hcd and address 3 usb 1-6: reset high speed USB device using ehci_hcd and address 3 usb 1-6: reset high speed USB device using ehci_hcd and address 3 usb 1-6: reset high speed USB device using ehci_hcd and address 3 lsusb: Bus 001 Device 003: ID 067b:2507 Prolific Technology, Inc. PL2507 Hi-speed USB to IDE bridge controller Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x067b Prolific Technology, Inc. idProduct 0x2507 PL2507 Hi-speed USB to IDE bridge controller bcdDevice 1.00 iManufacturer 1 iProduct 2 iSerial 3 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 32 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xc0 Self Powered MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 8 Mass Storage bInterfaceSubClass 6 SCSI bInterfaceProtocol 80 Bulk (Zip) iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT 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 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 -- USB Hard Drive Not Accessible, vol_id hangs https://bugs.launchpad.net/bugs/264789 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs