[ale] New 2.0 USB hub

Chris Fowler cfowler at outpostsentinel.com
Sat May 30 20:29:17 EDT 2009


I bought a new 2.0 USB hub to attach a SeaLink USB serial device and a
printer to the same port.  When I was trying to use some software that
uses the serial device it kept going back and forth between USB0 and
USB1.  In the end I had to connect it directly to the computer.  


[884884.225044] hub 2-3:1.0: port 1 disabled by hub (EMI?),
re-enabling...
[884884.228032] usb 2-3.1: USB disconnect, address 34
[884884.228339] ftdi_sio 2-3.1:1.0: device disconnected
[884884.503048] usb 2-3.1: new full speed USB device using ohci_hcd and
address 35
[884884.625211] usb 2-3.1: configuration #1 chosen from 1 choice
[884884.634812] ftdi_sio 2-3.1:1.0: FTDI USB Serial Device converter
detected
[884884.634856] usb 2-3.1: Detected FT232BM
[884884.634968] usb 2-3.1: FTDI USB Serial Device converter now attached
to ttyUSB0
[884890.856920] ftdi_sio ttyUSB1: FTDI USB Serial Device converter now
disconnected from ttyUSB1
[884898.564045] usb 2-3.3: USB disconnect, address 31
[884898.567124] usblp0: removed
[884912.801051] hub 2-3:1.0: port 1 disabled by hub (EMI?),
re-enabling...
[884912.804036] usb 2-3.1: USB disconnect, address 35
[884912.804884] ftdi_sio 2-3.1:1.0: device disconnected
[884913.054042] usb 2-3.1: new full speed USB device using ohci_hcd and
address 36
[884913.184198] usb 2-3.1: configuration #1 chosen from 1 choice
[884913.196158] ftdi_sio 2-3.1:1.0: FTDI USB Serial Device converter
detected
[884913.200833] usb 2-3.1: Detected FT232BM
[884913.200974] usb 2-3.1: FTDI USB Serial Device converter now attached
to ttyUSB1
[884916.377366] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now
disconnected from ttyUSB0
[884923.031831] usb 2-3: USB disconnect, address 29
[884923.031839] usb 2-3.1: USB disconnect, address 36
[884923.032286] ftdi_sio ttyUSB1: FTDI USB Serial Device converter now
disconnected from ttyUSB1
[884923.032312] ftdi_sio 2-3.1:1.0: device disconnected
[884928.964045] usb 2-3: new full speed USB device using ohci_hcd and
address 37
[884929.184739] usb 2-3: configuration #1 chosen from 1 choice
[884929.187184] ftdi_sio 2-3:1.0: FTDI USB Serial Device converter
detected
[884929.187230] usb 2-3: Detected FT232BM
[884929.187324] usb 2-3: FTDI USB Serial Device converter now attached
to ttyUSB0

This serial converter has acted strangely on hubs and I need to attach
it directly to the computer.  Maybe it requires the full 500ma?


Chris



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