Arch Linux

kayrune

Member

Registered: 2007-12-15

Posts: 43

USB device problem

I have a phoenix USB cardreader connected to my arch computer, I have it set up perfectly. And the interface software works fine. But then the problem starts. suddenly the device change from USB0 to USB1, I havn't done anything, and it's the only USB device connected to the computer. Then a few hours later it change back to USB0.

Any idea what could be wrong ?

This is the output of dmesg, i've tried to change usb port to see if it helps

hub 1-0:1.0: port 1 disabled by hub (EMI?), re-enabling...
usb 1-1: USB disconnect, address 4
ftdi_sio 1-1:1.0: device disconnected
usb 1-1: new full speed USB device using uhci_hcd and address 5
usb 1-1: configuration #1 chosen from 1 choice
ftdi_sio 1-1:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232BM
usb 1-1: FTDI USB Serial Device converter now attached to ttyUSB1
ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
hub 1-0:1.0: port 1 disabled by hub (EMI?), re-enabling...
usb 1-1: USB disconnect, address 5
ftdi_sio 1-1:1.0: device disconnected
usb 1-1: new full speed USB device using uhci_hcd and address 6
usb 1-1: configuration #1 chosen from 1 choice
ftdi_sio 1-1:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232BM
usb 1-1: FTDI USB Serial Device converter now attached to ttyUSB0
ftdi_sio ttyUSB1: FTDI USB Serial Device converter now disconnected from ttyUSB1
usb 1-1: USB disconnect, address 6
ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
ftdi_sio 1-1:1.0: device disconnected
usb 1-2: new full speed USB device using uhci_hcd and address 7
usb 1-2: configuration #1 chosen from 1 choice
ftdi_sio 1-2:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232BM
usb 1-2: FTDI USB Serial Device converter now attached to ttyUSB0

lilsirecho

Veteran

Registered: 2003-10-24

Posts: 5,000

Re: USB device problem

Perhaps a bad cable...or if using hub...a reset occured....overload of the 5v current limit

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