Re: Ubuntu USB-Serial port install procedure

followed instructions but adapter not working

[ 3878.944100] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 3878.956085] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 3878.968082] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 3878.980113] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 3878.992085] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 4018.910082] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 4018.922077] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 4018.934090] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 4018.946087] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 4018.958100] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 4018.970090] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 4018.982087] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 4018.994110] mct_u232 ttyUSB0: usb_submit_urb(read bulk) failed pipe 0x40410880 err -22
[ 6765.692623] handle_rx_packet: invalid, small RX packet : 1
[ 6792.986818] usb 2-1: USB disconnect, address 9
[ 6795.736066] usb 2-1: new full speed USB device using ohci_hcd and address 10
[ 7005.597043] CE: hpet increased min_delta_ns to 7500 nsec
[ 7273.164806] usb 2-2: USB disconnect, address 8
[ 7273.165406] mct_u232 ttyUSB0: MCT U232 converter now disconnected from ttyUSB0
[ 7273.165449] mct_u232 2-2:1.0: device disconnected
[ 7274.945662] usb 2-1: USB disconnect, address 10
[ 7288.772075] usb 2-2: new full speed USB device using ohci_hcd and address 11
[ 8053.399703] usb 2-2: USB disconnect, address 11
[ 8057.568071] usb 2-2: new full speed USB device using ohci_hcd and address 12
[ 8386.616091] usb 1-1: new high speed USB device using ehci_hcd and address 14
[ 8387.260592] Initializing USB Mass Storage driver...
[ 8387.260878] scsi4 : usb-storage 1-1:1.0
[ 8387.261368] usbcore: registered new interface driver usb-storage
[ 8387.261375] USB Mass Storage support registered.
[ 8390.324739] scsi 4:0:0:0: Direct-Access Lexar USB Flash Drive 3000 PQ: 0 ANSI: 0 CCS
[ 8390.326629] sd 4:0:0:0: Attached scsi generic sg2 type 0
[ 8394.444645] sd 4:0:0:0: [sdb] 31326208 512-byte logical blocks: (16.0 GB/14.9 GiB)
[ 8394.446085] sd 4:0:0:0: [sdb] Write Protect is off
[ 8394.446101] sd 4:0:0:0: [sdb] Mode Sense: 43 00 00 00
[ 8394.446109] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[ 8394.451175] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[ 8394.451209] sdb: sdb1
[ 8394.458094] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[ 8394.458114] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[ 8842.244373] handle_rx_packet: invalid, small RX packet : 1
[ 8885.032491] handle_rx_packet: invalid, small RX packet : 1
[ 8887.574753] handle_rx_packet: invalid, small RX packet : 1
[ 8890.738889] handle_rx_packet: invalid, small RX packet : 1
[10077.803837] usb 1-1: USB disconnect, address 14
[10085.201188] usb 2-2: USB disconnect, address 12
[10091.252091] usb 2-2: new full speed USB device using ohci_hcd and address 13
[10286.526161] usb 2-2: USB disconnect, address 13
[10288.772097] usb 2-1: new full speed USB device using ohci_hcd and address 14


any help would be appreciated?