[Ftdi-usb-sio-devel] Connection losses on Sanguinololu

[JPT <j-...@gm...>]

Hi,

is this the driver that's still built into kernel 3.6?

I built a 3d printer using a Sanguinololu.
I am experiencing connection losses. This is very annyoing in the middle
of a print.

Sanguinololu has got an onboard FT232RL (Vendor=0403, Product=6001)

I tried to switch on debug log, but did not get additional output in syslog:
  sudo modprobe ftdi_sio vendor=0x403 product=0x6001 debug

When a connection loss occurs, the following is logged:

20:50:14 kernel: [245476.341732] usb 3-12: USB disconnect, device number 57
20:50:14 kernel: [245476.342111] ftdi_sio ttyUSB0: FTDI USB Serial
Device converter now disconnected from ttyUSB0
20:50:15 kernel: [245476.611948] usb 3-12: new full-speed USB device
number 58 using xhci_hcd
20:50:15 kernel: [245476.633980] usb 3-12: New USB device found,
idVendor=0403, idProduct=6001
20:50:15 kernel: [245476.633990] usb 3-12: New USB device strings:
Mfr=1, Product=2, SerialNumber=3
20:50:15 kernel: [245476.633995] usb 3-12: Product: FT232R USB UART
20:50:15 kernel: [245476.633999] usb 3-12: Manufacturer: FTDI
20:50:15 kernel: [245476.634003] usb 3-12: SerialNumber: AH01R0T7
20:50:15 kernel: [245476.636987] ftdi_sio 3-12:1.0: FTDI USB Serial
Device converter detected
20:50:15 kernel: [245476.637051] usb 3-12: Detected FT232RL
20:50:15 kernel: [245476.637056] usb 3-12: Number of endpoints 2
20:50:15 kernel: [245476.637060] usb 3-12: Endpoint 1 MaxPacketSize 64
20:50:15 kernel: [245476.637064] usb 3-12: Endpoint 2 MaxPacketSize 64
20:50:15 kernel: [245476.637068] usb 3-12: Setting MaxPacketSize 64
20:50:15 kernel: [245476.637423] usb 3-12: FTDI USB Serial Device
converter now attached to ttyUSB1

so, it's almost instantly reconnected, but with different device file,
because the old one is still in use by Pronterface.

How could I solve this problem?

thanks,

JPT