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Ubuntu 9.10

I first started using my Huawei E220 HSDPA modem since the release of Ubuntu 7.10 (Gutsy Gibbon), and while there were some problems with it at first, it was somehow fixed later on I've and been using it without problems, until I upgraded to Ubuntu 9.10. The kernel seems to have problems with the USB mass storage device; where it alternatingly detect the Huawei E220 modem as a modem, and as a storage, but not both at the same time. This is a problem because when it is detected as a storage device, it can't be used as a modem, thus can't be used to connect to the internet. This might better be explained by the following kernel log;

usb 6-1: new full speed USB device using uhci_hcd and address 5
usb 6-1: configuration #1 chosen from 1 choice
Initializing USB Mass Storage driver...
scsi13 : SCSI emulation for USB Mass Storage devices
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usb 6-1: USB disconnect, address 5
usb 6-1: new full speed USB device using uhci_hcd and address 6
usb 6-1: configuration #1 chosen from 1 choice
option 6-1:1.0: GSM modem (1-port) converter detected
usb 6-1: GSM modem (1-port) converter now attached to ttyUSB0
option 6-1:1.1: GSM modem (1-port) converter detected
usb 6-1: GSM modem (1-port) converter now attached to ttyUSB1
scsi14 : SCSI emulation for USB Mass Storage devices
scsi 14:0:0:0: CD-ROM            HUAWEI   Mass Storage     2.31 PQ: 0 ANSI: 2
sr1: scsi-1 drive
sr 14:0:0:0: Attached scsi generic sg2 type 5
sr: Sense Key : No Sense [current]
sr: Add. Sense: No additional sense information
sr: Sense Key : No Sense [current]
sr: Add. Sense: No additional sense information
sr: Add. Sense: No additional sense information
option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
option 6-1:1.0: device disconnected
option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
option 6-1:1.1: device disconnected
usb 6-1: reset full speed USB device using uhci_hcd and address 6
option 6-1:1.1: GSM modem (1-port) converter detected
usb 6-1: GSM modem (1-port) converter now attached to ttyUSB0
option 6-1:1.0: GSM modem (1-port) converter detected
usb 6-1: GSM modem (1-port) converter now attached to ttyUSB1
option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
option 6-1:1.0: device disconnected
option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
option 6-1:1.1: device disconnected
usb 6-1: reset full speed USB device using uhci_hcd and address 6
usb 6-1: USB disconnect, address 6

What I do to temporarily fix (it's just a workround actually, not really a fix) is to run the following command at the console, prior to plugging in the modem to the USB slot;

$ watch -n1 sudo rmmod usb-storage

This would remove the usb_storage module, and would make the device not detected as a USB storage device. From here I can connect to the internet using the Network Manager's Mobile Broadband as I normally would.

p/s: Do take note that this would make the system to not be able to detect any USB storage devices such as your thumb drives, till the rmmod command is killed.